Забытые 1 и 2 лабы

lab1/.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

lab1/build.gradle

@@ -0,0 +1,27 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.2.2'
+	id 'io.spring.dependency-management' version '1.1.4'
+}
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	sourceCompatibility = '17'
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.3.0'
+
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

lab1/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

lab1/gradlew

@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

lab1/gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

lab1/index.html

@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <p id="out">Push the button</p>
+    <input id="name"/>
+    <br/>
+    <button onclick="get()">Get</button>
+    <br/>
+    <button onclick="getTest()">Get Test</button>
+    <br/>
+    <button onclick="post()">Post</button>
+    <br/>
+    <button onclick="put()">Put</button>
+</body>
+<script>
+    const url = "http://localhost:8080/api";
+    const out = document.getElementById("out");
+    const name = document.getElementById("name");
+    const get = async () => {
+        const res = await fetch(`${url}?name=${name.value}`);
+        const text = await res.text();
+        out.innerText = text;
+    }
+    const getTest = async () => {
+        const res = await fetch(`${url}/test`);
+        const text = await res.text();
+        out.innerText = text;
+    }
+    const post = async () => {
+        if (!name.value) {
+            alert("Name is required");
+            return;
+        }
+        const res = await fetch(url, {
+            method: 'post', 
+            headers: {'Content-Type': 'application/json'}, 
+            body: name.value
+        });
+        const text = await res.text();
+        out.innerText = text;
+    }
+    const put = async () => {
+        if (!name.value) {
+            alert("Name is required");
+            return;
+        }
+        const res = await fetch(`${url}/${name.value}`, {
+            method: 'put', 
+            headers: {'Content-Type': 'application/json'}, 
+            body: name.value
+        });
+        const text = await res.text();
+        out.innerText = text;
+    }
+</script>
+</html>

lab1/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'demo'

lab1/src/main/java/com/example/demo/ApiController.java

@@ -0,0 +1,49 @@
+package com.example.demo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/book")
+public class ApiController {
+    private final List<BookDto> books = new ArrayList<>();
+
+    @GetMapping
+    public List<BookDto> getBooks() {
+        return books;
+    }
+
+    @GetMapping("/{id}")
+    public BookDto getBook(@PathVariable(name = "id") int id) {
+        return books.get(id);
+    }
+
+    @PostMapping
+    public BookDto postMap(@RequestBody BookDto bookDto) {
+        books.add(bookDto);
+        return bookDto;
+    }
+
+    @PutMapping("/{id}")
+    public BookDto putMap(@RequestBody BookDto bookDto, @PathVariable(name = "id") int id) {
+        books.set(id, bookDto);
+        return bookDto;
+    }
+
+    @DeleteMapping("/{id}")
+    public BookDto delete(@RequestParam(name = "id") int id) {
+        BookDto bk = books.get(id);
+        books.remove(id);
+        return bk;
+    }
+}

lab1/src/main/java/com/example/demo/BookDto.java

@@ -0,0 +1,49 @@
+package com.example.demo;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class BookDto {
+    private String name;
+    private String author;
+    private String genre;
+    private String year;
+    private String description;
+
+    public BookDto() {
+    }
+
+    @JsonCreator
+    public BookDto(
+            @JsonProperty(value = "name") String name,
+            @JsonProperty(value = "author") String author,
+            @JsonProperty(value = "genre") String genre,
+            @JsonProperty(value = "year") String year,
+            @JsonProperty(value = "description") String description) {
+        this.name = name;
+        this.author = author;
+        this.genre = genre;
+        this.year = year;
+        this.description = description;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public String getGenre() {
+        return genre;
+    }
+
+    public String getYear() {
+        return year;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}

lab1/src/main/java/com/example/demo/DemoApplication.java

@@ -0,0 +1,12 @@
+package com.example.demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class DemoApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(DemoApplication.class, args);
+	}
+}

lab1/src/main/java/com/example/demo/WebConfig.java

@@ -0,0 +1,15 @@
+package com.example.demo;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.lang.NonNull;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+    @Override
+    public void addCorsMappings(@NonNull CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedMethods("GET", "POST", "PUT", "DELETE");
+    }
+}

lab1/src/main/resources/application.properties

@@ -0,0 +1 @@
+

lab1/src/test/java/com/example/demo/DemoApplicationTests.java

@@ -0,0 +1,13 @@
+package com.example.demo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class DemoApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

lab2/.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

lab2/build.gradle

@@ -0,0 +1,29 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.2.3'
+	id 'io.spring.dependency-management' version '1.1.4'
+}
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	sourceCompatibility = '17'
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.3.0'
+	implementation 'org.modelmapper:modelmapper:3.2.0'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

lab2/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

lab2/gradlew

@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

lab2/gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

lab2/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'demo'

lab2/src/main/java/com/example/demo/DemoApplication.java

@@ -0,0 +1,50 @@
+package com.example.demo;
+
+import java.util.Objects;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+import com.example.demo.books.model.BookEntity;
+import com.example.demo.books.service.BookService;
+import com.example.demo.genres.model.GenreEntity;
+import com.example.demo.genres.service.GenreService;
+
+@SpringBootApplication
+public class DemoApplication implements CommandLineRunner {
+	private final Logger log = LoggerFactory.getLogger(DemoApplication.class);
+
+	private final GenreService genreService;
+	private final BookService bookService;
+
+	public DemoApplication(GenreService genreService, BookService bookService) {
+		this.genreService = genreService;
+		this.bookService = bookService;
+	}
+
+	public static void main(String[] args) {
+		SpringApplication.run(DemoApplication.class, args);
+	}
+
+	@Override
+	public void run(String... args) throws Exception {
+		if (args.length > 0 && Objects.equals("--populate", args[0])) {
+			log.info("Create default genres values");
+			final var genre1 = genreService.create(new GenreEntity(null, "Роман"));
+			final var genre2 = genreService.create(new GenreEntity(null, "Фэнтези"));
+			final var genre3 = genreService.create(new GenreEntity(null, "Трагедия"));
+
+			log.info("Create default books values");
+			bookService.create(new BookEntity(null, genre1, "g", "g", "g", "g"));
+			bookService.create(new BookEntity(null, genre1, "q", "y", "q", "y"));
+			bookService.create(new BookEntity(null, genre2, "w", "t", "w", "t"));
+			bookService.create(new BookEntity(null, genre2, "e", "r", "e", "r"));
+			bookService.create(new BookEntity(null, genre3, "r", "e", "r", "e"));
+			bookService.create(new BookEntity(null, genre3, "t", "w", "t", "w"));
+			bookService.create(new BookEntity(null, genre1, "y", "q", "y", "q"));
+		}
+	}
+}

lab2/src/main/java/com/example/demo/books/api/BookController.java

@@ -0,0 +1,71 @@
+package com.example.demo.books.api;
+
+import java.util.List;
+
+import org.modelmapper.ModelMapper;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.example.demo.genres.service.GenreService;
+import com.example.demo.core.configuration.Constants;
+import com.example.demo.books.model.BookEntity;
+import com.example.demo.books.service.BookService;
+
+import jakarta.validation.Valid;
+
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.PutMapping;
+
+@RestController
+@RequestMapping(Constants.API_URL + "/book")
+public class BookController {
+    private final BookService bookService;
+    private final GenreService genreService;
+    private final ModelMapper modelMapper;
+
+    public BookController(BookService bookService, GenreService genreService, ModelMapper modelMapper) {
+        this.modelMapper = modelMapper;
+        this.genreService = genreService;
+        this.bookService = bookService;
+    }
+
+    private BookDto toDto(BookEntity entity) {
+        return modelMapper.map(entity, BookDto.class);
+    }
+
+    private BookEntity toEntity(BookDto dto) {
+        final BookEntity entity = modelMapper.map(dto, BookEntity.class);
+        entity.setGenre(genreService.get(dto.getGenreId()));
+        return entity;
+    }
+
+    @GetMapping
+    public List<BookDto> getAll(@RequestParam(name = "genreId", defaultValue = "0") Integer genreId) {
+        return bookService.getAll(genreId).stream().map(this::toDto).toList();
+    }
+
+    @GetMapping("/{id}")
+    public BookDto get(@PathVariable(name = "id") Integer id) {
+        return toDto(bookService.get(id));
+    }
+
+    @PostMapping
+    public BookDto create(@RequestBody @Valid BookDto dto) {
+        return toDto(bookService.create(toEntity(dto)));
+    }
+
+    @PutMapping("/{id}")
+    public BookDto update(@PathVariable(name = "id") Integer id, @RequestBody BookDto dto) {
+        return toDto(bookService.update(id, toEntity(dto)));
+    }
+
+    @DeleteMapping("/{id}")
+    public BookDto delete(@PathVariable(name = "id") Integer id) {
+        return toDto(bookService.delete(id));
+    }
+}

lab2/src/main/java/com/example/demo/books/api/BookDto.java

@@ -0,0 +1,76 @@
+package com.example.demo.books.api;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+
+public class BookDto {
+    private Integer id;
+
+    @NotNull
+    @Min(1)
+    private Integer genreId;
+
+    @NotBlank
+    private String name;
+
+    @NotBlank
+    private String author;
+
+    @NotBlank
+    private String year;
+
+    @NotBlank
+    private String description;
+
+    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getGenreId() {
+        return genreId;
+    }
+
+    public void setGenreId(Integer genreId) {
+        this.genreId = genreId;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public String getYear() {
+        return year;
+    }
+
+    public void setYear(String year) {
+        this.year = year;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+}

lab2/src/main/java/com/example/demo/books/model/BookEntity.java

@@ -0,0 +1,87 @@
+package com.example.demo.books.model;
+
+import java.util.Objects;
+
+import com.example.demo.core.model.BaseEntity;
+import com.example.demo.genres.model.GenreEntity;
+
+public class BookEntity extends BaseEntity {
+    private GenreEntity genre;
+    private String name;
+    private String author;
+    private String year;
+    private String description;
+
+    public BookEntity() {
+        super();
+    }
+
+    public BookEntity(Integer id, GenreEntity genre, String name, String author, String year, String description) {
+        super(id);
+        this.genre = genre;
+        this.name = name;
+        this.author = author;
+        this.year = year;
+        this.description = description;
+    }
+
+    public GenreEntity getGenre() {
+        return genre;
+    }
+
+    public void setGenre(GenreEntity genre) {
+        this.genre = genre;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getYear() {
+        return year;
+    }
+
+    public void setYear(String year) {
+        this.year = year;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, genre, name, author, year, description);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null || getClass() != obj.getClass())
+            return false;
+        final BookEntity other = (BookEntity) obj;
+        return Objects.equals(other.getId(), id)
+                && Objects.equals(other.getGenre(), genre)
+                && Objects.equals(other.getName(), name)
+                && Objects.equals(other.getAuthor(), author)
+                && Objects.equals(other.getYear(), year)
+                && Objects.equals(other.getDescription(), description);
+    }
+}

lab2/src/main/java/com/example/demo/books/repository/BookRepository.java

@@ -0,0 +1,11 @@
+package com.example.demo.books.repository;
+
+import org.springframework.stereotype.Repository;
+
+import com.example.demo.core.repository.MapRepository;
+import com.example.demo.books.model.BookEntity;
+
+@Repository
+public class BookRepository extends MapRepository<BookEntity> {
+
+}

lab2/src/main/java/com/example/demo/books/service/BookService.java

@@ -0,0 +1,57 @@
+package com.example.demo.books.service;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+import org.springframework.stereotype.Service;
+
+import com.example.demo.core.error.NotFoundException;
+import com.example.demo.books.model.BookEntity;
+import com.example.demo.books.repository.BookRepository;
+
+@Service
+public class BookService {
+    private final BookRepository repository;
+
+    public BookService(BookRepository repository) {
+        this.repository = repository;
+    }
+
+    public List<BookEntity> getAll(Integer genreId) {
+        if (Objects.equals(genreId, 0)) {
+            return repository.getAll();
+        }
+        return repository.getAll().stream()
+                .filter(book -> book.getGenre().getId().equals(genreId))
+                .toList();
+    }
+
+    public BookEntity get(Integer id) {
+        return Optional.ofNullable(repository.get(id))
+                .orElseThrow(() -> new NotFoundException(id));
+    }
+
+    public BookEntity create(BookEntity entity) {
+        return repository.create(entity);
+    }
+
+    public BookEntity update(Integer id, BookEntity entity) {
+        final BookEntity existsEntity = get(id);
+        existsEntity.setGenre(entity.getGenre());
+        existsEntity.setName(entity.getName());
+        existsEntity.setAuthor(entity.getAuthor());
+        existsEntity.setYear(entity.getYear());
+        existsEntity.setDescription(entity.getDescription());
+        return repository.update(existsEntity);
+    }
+
+    public BookEntity delete(Integer id) {
+        final BookEntity existsEntity = get(id);
+        return repository.delete(existsEntity);
+    }
+
+    public void deleteAll() {
+        repository.deleteAll();
+    }
+}

lab2/src/main/java/com/example/demo/core/configuration/Constants.java

@@ -0,0 +1,8 @@
+package com.example.demo.core.configuration;
+
+public class Constants {
+    public static final String API_URL = "/api";
+
+    private Constants() {
+    }
+}

lab2/src/main/java/com/example/demo/core/configuration/MapperConfiguration.java

@@ -0,0 +1,13 @@
+package com.example.demo.core.configuration;
+
+import org.modelmapper.ModelMapper;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MapperConfiguration {
+    @Bean
+    ModelMapper modelMapper() {
+        return new ModelMapper();
+    }
+}

lab2/src/main/java/com/example/demo/core/configuration/WebConfiguration.java

@@ -0,0 +1,15 @@
+package com.example.demo.core.configuration;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.lang.NonNull;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebConfiguration implements WebMvcConfigurer {
+    @Override
+    public void addCorsMappings(@NonNull CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedMethods("GET", "POST", "PUT", "DELETE");
+    }
+}

lab2/src/main/java/com/example/demo/core/error/NotFoundException.java

@@ -0,0 +1,7 @@
+package com.example.demo.core.error;
+
+public class NotFoundException extends RuntimeException {
+    public NotFoundException(Integer id) {
+        super(String.format("Entity with id [%s] is not found or not exists", id));
+    }
+}

lab2/src/main/java/com/example/demo/core/model/BaseEntity.java

@@ -0,0 +1,23 @@
+package com.example.demo.core.model;
+
+public class BaseEntity {
+
+    public Integer id;
+
+    protected BaseEntity() {
+
+    }
+
+    protected BaseEntity(Integer id) {
+        this.id = id;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+}

lab2/src/main/java/com/example/demo/core/repository/CommonRepository.java

@@ -0,0 +1,17 @@
+package com.example.demo.core.repository;
+
+import java.util.List;
+
+public interface CommonRepository<E, T> {
+    List<E> getAll();
+
+    E get(T id);
+
+    E create(E entity);
+
+    E update(E entity);
+
+    E delete(E entity);
+
+    void deleteAll();
+}

lab2/src/main/java/com/example/demo/core/repository/MapRepository.java

@@ -0,0 +1,63 @@
+package com.example.demo.core.repository;
+
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+import com.example.demo.core.model.BaseEntity;
+
+public abstract class MapRepository<E extends BaseEntity> implements CommonRepository<E, Integer> {
+    private final Map<Integer, E> entities = new TreeMap<>();
+    private Integer lastId = 0;
+
+    private boolean checkNull(E entity) {
+        if (get(entity.getId()) == null)
+            return false;
+        return true;
+    }
+
+    protected MapRepository() {
+    }
+
+    @Override
+    public List<E> getAll() {
+        return entities.values().stream().toList();
+    }
+
+    @Override
+    public E get(Integer id) {
+        return entities.get(id);
+    }
+
+    @Override
+    public E create(E entity) {
+        lastId++;
+        entity.setId(lastId);
+        entities.put(lastId, entity);
+        return entity;
+    }
+
+    @Override
+    public E update(E entity) {
+        if (checkNull(entity)) {
+            entities.put(entity.getId(), entity);
+            return entity;
+        }
+        return null;
+    }
+
+    @Override
+    public E delete(E entity) {
+        if (checkNull(entity)) {
+            entities.remove(entity.getId());
+            return entity;
+        }
+        return null;
+    }
+
+    @Override
+    public void deleteAll() {
+        entities.clear();
+        lastId = 0;
+    }
+}

lab2/src/main/java/com/example/demo/genres/api/GenreController.java

@@ -0,0 +1,64 @@
+package com.example.demo.genres.api;
+
+import java.util.List;
+
+import org.modelmapper.ModelMapper;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.example.demo.core.configuration.Constants;
+import com.example.demo.genres.model.GenreEntity;
+import com.example.demo.genres.service.GenreService;
+
+import jakarta.validation.Valid;
+
+@RestController
+@RequestMapping(Constants.API_URL + "/genre")
+public class GenreController {
+    private final GenreService genreService;
+    private final ModelMapper modelMapper;
+
+    public GenreController(GenreService genreService, ModelMapper modelMapper) {
+        this.genreService = genreService;
+        this.modelMapper = modelMapper;
+    }
+
+    private GenreDto toDto(GenreEntity entity) {
+        return modelMapper.map(entity, GenreDto.class);
+    }
+
+    private GenreEntity toEntity(GenreDto dto) {
+        return modelMapper.map(dto, GenreEntity.class);
+    }
+
+    @GetMapping
+    public List<GenreDto> getAll() {
+        return genreService.getAll().stream().map(this::toDto).toList();
+    }
+
+    @GetMapping("/{id}")
+    public GenreDto get(@PathVariable(name = "id") Integer id) {
+        return toDto(genreService.get(id));
+    }
+
+    @PostMapping
+    public GenreDto create(@RequestBody @Valid GenreDto dto) {
+        return toDto(genreService.create(toEntity(dto)));
+    }
+
+    @PutMapping("/{id}")
+    public GenreDto update(@PathVariable(name = "id") Integer id, @RequestBody GenreDto dto) {
+        return toDto(genreService.update(id, toEntity(dto)));
+    }
+
+    @DeleteMapping("/{id}")
+    public GenreDto delete(@PathVariable(name = "id") Integer id) {
+        return toDto(genreService.delete(id));
+    }
+}

lab2/src/main/java/com/example/demo/genres/api/GenreDto.java

@@ -0,0 +1,28 @@
+package com.example.demo.genres.api;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import jakarta.validation.constraints.NotBlank;
+
+public class GenreDto {
+    private Integer id;
+    @NotBlank
+    private String name;
+
+    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

lab2/src/main/java/com/example/demo/genres/model/GenreEntity.java

@@ -0,0 +1,41 @@
+package com.example.demo.genres.model;
+
+import java.util.Objects;
+
+import com.example.demo.core.model.BaseEntity;
+
+public class GenreEntity extends BaseEntity {
+    private String name;
+
+    public GenreEntity() {
+        super();
+    }
+
+    public GenreEntity(Integer id, String name) {
+        super(id);
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, name);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null || getClass() != obj.getClass())
+            return false;
+        final GenreEntity other = (GenreEntity) obj;
+        return Objects.equals(other.getId(), id) && Objects.equals(other.getName(), name);
+    }
+}

lab2/src/main/java/com/example/demo/genres/repository/GenreRepository.java

@@ -0,0 +1,10 @@
+package com.example.demo.genres.repository;
+
+import org.springframework.stereotype.Repository;
+
+import com.example.demo.core.repository.MapRepository;
+import com.example.demo.genres.model.GenreEntity;
+
+@Repository
+public class GenreRepository extends MapRepository<GenreEntity> {
+}

lab2/src/main/java/com/example/demo/genres/service/GenreService.java

@@ -0,0 +1,46 @@
+package com.example.demo.genres.service;
+
+import org.springframework.stereotype.Service;
+import java.util.List;
+import java.util.Optional;
+
+import com.example.demo.core.error.NotFoundException;
+import com.example.demo.genres.model.GenreEntity;
+
+import com.example.demo.genres.repository.GenreRepository;
+
+@Service
+public class GenreService {
+    private final GenreRepository repository;
+
+    public GenreService(GenreRepository repository) {
+        this.repository = repository;
+    }
+
+    public List<GenreEntity> getAll() {
+        return repository.getAll();
+    }
+
+    public GenreEntity get(Integer id) {
+        return Optional.ofNullable(repository.get(id)).orElseThrow(() -> new NotFoundException(id));
+    }
+
+    public GenreEntity create(GenreEntity entity) {
+        return repository.create(entity);
+    }
+
+    public GenreEntity update(Integer id, GenreEntity entity) {
+        final GenreEntity exisEntity = get(id);
+        exisEntity.setName(entity.getName());
+        return repository.update(exisEntity);
+    }
+
+    public GenreEntity delete(Integer id) {
+        final GenreEntity existEntity = get(id);
+        return repository.delete(existEntity);
+    }
+
+    public void deleteAll() {
+        repository.deleteAll();
+    }
+}

lab2/src/main/java/com/example/demo/users/api/UserController.java

@@ -0,0 +1,85 @@
+package com.example.demo.users.api;
+
+import java.util.List;
+
+import org.modelmapper.ModelMapper;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.example.demo.books.model.BookEntity;
+import com.example.demo.books.service.BookService;
+import com.example.demo.core.configuration.Constants;
+import com.example.demo.users.model.UserEntity;
+import com.example.demo.users.service.UserService;
+
+import jakarta.validation.Valid;
+
+@RestController
+@RequestMapping(Constants.API_URL + "/user")
+public class UserController {
+    private final UserService userService;
+    private final ModelMapper modelMapper;
+    private final BookService bookService;
+
+    public UserController(UserService userService, ModelMapper modelMapper, BookService bookService) {
+        this.modelMapper = modelMapper;
+        this.userService = userService;
+        this.bookService = bookService;
+    }
+
+    private UserDto toDto(UserEntity entity) {
+        // return modelMapper.map(entity, UserDto.class);
+        final var dto = new UserDto();
+        dto.setId(entity.getId());
+        dto.setUsername(entity.getUsername());
+        dto.setPassword(entity.getPassword());
+        dto.setIsAdmin(entity.getIsAdmin());
+        dto.setBooks(entity.getBooks().stream().map(BookEntity::getId).toList());
+        return dto;
+    }
+
+    private UserEntity toEntity(UserDto dto) {
+        return modelMapper.map(dto, UserEntity.class);
+    }
+
+    @GetMapping()
+    public List<UserDto> getAll() {
+        return userService.getAll().stream().map(this::toDto).toList();
+    }
+
+    @GetMapping("/{id}")
+    public UserDto get(@PathVariable(name = "id") Integer id) {
+        return toDto(userService.get(id));
+    }
+
+    @PostMapping
+    public UserDto create(@Valid @RequestBody UserDto dto) {
+        return toDto(userService.create(toEntity(dto)));
+    }
+
+    @PostMapping("/{id}/book/{bookId}")
+    public UserDto addBook(@PathVariable(name = "id") Integer id, @PathVariable(name = "bookId") Integer bookId) {
+        return toDto(userService.addBook(id, bookService.get(bookId)));
+    }
+
+    @PutMapping("/{id}")
+    public UserDto update(@PathVariable(name = "id") Integer id, @RequestBody UserDto userDto) {
+        return toDto(userService.update(id, toEntity(userDto)));
+    }
+
+    @DeleteMapping("/{id}")
+    public UserDto delete(@PathVariable(name = "id") Integer id) {
+        return toDto(userService.delete(id));
+    }
+
+    @DeleteMapping("/{id}/book/{bookId}")
+    public UserDto deleteBook(@PathVariable(name = "id") Integer id, @PathVariable(name = "bookId") Integer bookId) {
+        return toDto(userService.deleteBook(id, bookService.get(bookId)));
+    }
+}

lab2/src/main/java/com/example/demo/users/api/UserDto.java

@@ -0,0 +1,66 @@
+package com.example.demo.users.api;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+
+public class UserDto {
+    private Integer id;
+
+    @NotBlank
+    private String username;
+
+    @NotBlank
+    private String password;
+
+    @NotNull
+    private boolean isAdmin;
+
+    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
+    private List<Integer> books = new ArrayList<>();
+
+    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public boolean getIsAdmin() {
+        return isAdmin;
+    }
+
+    public void setIsAdmin(boolean isAdmin) {
+        this.isAdmin = isAdmin;
+    }
+
+    public List<Integer> getBooks() {
+        return books;
+    }
+
+    public void setBooks(List<Integer> list) {
+        this.books = list;
+    }
+}

lab2/src/main/java/com/example/demo/users/model/UserEntity.java

@@ -0,0 +1,82 @@
+package com.example.demo.users.model;
+
+import java.util.Objects;
+import java.util.Set;
+import java.util.LinkedHashSet;
+
+import com.example.demo.core.model.BaseEntity;
+import com.example.demo.books.model.BookEntity;
+
+public class UserEntity extends BaseEntity {
+
+    private String username;
+    private String password;
+    private boolean isAdmin;
+    private final Set<BookEntity> books = new LinkedHashSet<>();
+
+    public UserEntity() {
+        super();
+    }
+
+    public UserEntity(Integer id, String username, String password, boolean isAdmin) {
+        super(id);
+        this.username = username;
+        this.password = password;
+        this.isAdmin = isAdmin;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public boolean getIsAdmin() {
+        return isAdmin;
+    }
+
+    public void setIsAdmin(boolean isAdmin) {
+        this.isAdmin = isAdmin;
+    }
+
+    public Set<BookEntity> getBooks() {
+        return books;
+    }
+
+    public void addBook(BookEntity book) {
+        books.add(book);
+    }
+
+    public void deleteBook(BookEntity book) {
+        books.remove(book);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, username);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null || getClass() != obj.getClass())
+            return false;
+        final UserEntity other = (UserEntity) obj;
+        return Objects.equals(other.getId(), id) &&
+                Objects.equals(other.getUsername(), username) &&
+                Objects.equals(other.getIsAdmin(), isAdmin) &&
+                Objects.equals(other.getPassword(), password) &&
+                Objects.equals(other.getBooks(), books);
+    }
+}

lab2/src/main/java/com/example/demo/users/repository/UserRepository.java

@@ -0,0 +1,11 @@
+package com.example.demo.users.repository;
+
+import org.springframework.stereotype.Repository;
+
+import com.example.demo.core.repository.MapRepository;
+import com.example.demo.users.model.UserEntity;
+
+@Repository
+public class UserRepository extends MapRepository<UserEntity> {
+
+}

lab2/src/main/java/com/example/demo/users/service/UserService.java

@@ -0,0 +1,61 @@
+package com.example.demo.users.service;
+
+import java.util.List;
+import java.util.Optional;
+
+import org.springframework.stereotype.Service;
+
+import com.example.demo.books.model.BookEntity;
+import com.example.demo.core.error.NotFoundException;
+import com.example.demo.users.model.UserEntity;
+import com.example.demo.users.repository.UserRepository;
+
+@Service
+public class UserService {
+    private final UserRepository repository;
+
+    public UserService(UserRepository repository) {
+        this.repository = repository;
+    }
+
+    public List<UserEntity> getAll() {
+        return repository.getAll();
+    }
+
+    public UserEntity get(Integer id) {
+        return Optional.ofNullable(repository.get(id)).orElseThrow(() -> new NotFoundException(id));
+    }
+
+    public UserEntity create(UserEntity entity) {
+        return repository.create(entity);
+    }
+
+    public UserEntity update(Integer id, UserEntity entity) {
+        final UserEntity existedEntity = get(id);
+        existedEntity.setUsername(entity.getUsername());
+        existedEntity.setPassword(entity.getPassword());
+        existedEntity.setIsAdmin(entity.getIsAdmin());
+        return repository.update(existedEntity);
+    }
+
+    public UserEntity delete(Integer id) {
+        final UserEntity existsentity = get(id);
+        return repository.delete(existsentity);
+    }
+
+    public UserEntity addBook(Integer id, BookEntity book) {
+        final UserEntity existedEntity = get(id);
+        existedEntity.addBook(book);
+        return existedEntity;
+    }
+
+    public UserEntity deleteBook(Integer id, BookEntity book) {
+        final UserEntity existedEntity = get(id);
+        existedEntity.deleteBook(book);
+        return existedEntity;
+    }
+
+    public void deleteAll() {
+        repository.deleteAll();
+    }
+}

lab2/src/main/resources/application.properties

@@ -0,0 +1 @@
+

lab2/src/test/java/com/example/demo/BookServiceTests.java

@@ -0,0 +1,139 @@
+package com.example.demo;
+
+import org.junit.jupiter.api.TestMethodOrder;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import com.example.demo.genres.model.GenreEntity;
+import com.example.demo.genres.service.GenreService;
+import com.example.demo.core.error.NotFoundException;
+import com.example.demo.books.model.BookEntity;
+import com.example.demo.books.service.BookService;
+
+@SpringBootTest
+@TestMethodOrder(OrderAnnotation.class)
+public class BookServiceTests {
+    @Autowired
+    private BookService bookService;
+    @Autowired
+    private GenreService genreService;
+
+    @Test
+    void getTest() {
+        Assertions.assertThrows(NotFoundException.class, () -> bookService.get(0));
+    }
+
+    @Test
+    @Order(1)
+    void createTest() {
+        genreService.deleteAll();
+        bookService.deleteAll();
+
+        genreService.create(new GenreEntity(null, "Роман"));
+        genreService.create(new GenreEntity(null, "Комедия"));
+        genreService.create(new GenreEntity(null, "Трагедия"));
+
+        bookService.create(
+                new BookEntity(null, genreService.get(1), "Гордость и предубеждение", "автор1", "год1", "описание"));
+
+        bookService.create(new BookEntity(null, genreService.get(2), "Недоросль", "автор2", "год1", "описание"));
+
+        final BookEntity last = bookService
+                .create(new BookEntity(null, genreService.get(3), "Грозовой перевал", "автор3", "год1", "описание"));
+
+        // проверка, что кол-во игр в хранилище равно кол-ву добавленных (проверка, что
+        // все добавились)
+        Assertions.assertEquals(3, bookService.getAll(0).size());
+        // проверка, что в хранилище последняя игра та, которую добавили последней
+        // (проверка, что всё правильно добавилось)
+        Assertions.assertEquals(last, bookService.get(3));
+    }
+
+    @Test
+    @Order(2)
+    void update() {
+        // на какой жанр будем менять (со Стратегии на FMV)
+        final GenreEntity testEntity = genreService.get(1);
+
+        // на какое название будем менять название игры
+        final String testName = "Война и мир";
+
+        // на какое название будем менять название игры
+        final String testAuthor = "Л.Н.Толстой";
+
+        // на какое название будем менять название игры
+        final String testYear = "1892";
+
+        // на какое описание будем менять описание игры
+        final String testDescription = "Много французских букв";
+
+        // получение последней в списке игры
+        final BookEntity entity = bookService.get(3);
+
+        // запоминание старого жанра игры
+        final GenreEntity oldGenreEntity = entity.getGenre();
+
+        // запоминание её названия до обновления
+        final String oldName = entity.getName();
+
+        // запоминание её цены до обновления
+        final String oldAuthor = entity.getAuthor();
+
+        // запоминание её описания до обновления
+        final String oldDescription = entity.getDescription();
+
+        // запоминание её описания до обновления
+        final String oldYear = entity.getYear();
+
+        // запоминание новых данных жанра
+        final BookEntity newEntity = bookService.update(3,
+                new BookEntity(1, testEntity, testName, testAuthor, testYear, testDescription));
+
+        // Проверка, что кол-во игр до сих пор 3
+        Assertions.assertEquals(3, bookService.getAll(0).size());
+
+        Assertions.assertEquals(newEntity, bookService.get(3));
+
+        // Проверка, что жанр поменялся
+        Assertions.assertEquals(testEntity, newEntity.getGenre());
+        Assertions.assertNotEquals(oldGenreEntity, newEntity.getGenre());
+
+        // Проверка, что название поменялось
+        Assertions.assertEquals(testName, newEntity.getName());
+        Assertions.assertNotEquals(oldName, newEntity.getName());
+
+        // Проверка, что название поменялось
+        Assertions.assertEquals(testAuthor, newEntity.getAuthor());
+        Assertions.assertNotEquals(oldAuthor, newEntity.getAuthor());
+
+        // Проверка, что цена поменялась
+        Assertions.assertEquals(testYear, newEntity.getYear());
+        Assertions.assertNotEquals(oldYear, newEntity.getYear());
+
+        // Проверка, что описание поменялось
+        Assertions.assertEquals(testDescription, newEntity.getDescription());
+        Assertions.assertNotEquals(oldDescription, newEntity.getDescription());
+    }
+
+    @Test
+    @Order(3)
+    void delete() {
+        bookService.delete(3);
+        // Проверка, что после удаления в хранилище осталось 2 игры
+        Assertions.assertEquals(2, bookService.getAll(0).size());
+
+        final BookEntity last = bookService.get(2);
+        Assertions.assertEquals(2, last.getId());
+
+        final BookEntity newEntity = bookService
+                .create(new BookEntity(null, genreService.get(3), "книжка", "автор3", "год1", "описание"));
+        // Проверка, что в хранилище теперь снова 3 игры
+        Assertions.assertEquals(3, genreService.getAll().size());
+        // Проверка, что id у добавленной игры стал 4
+        Assertions.assertEquals(4, newEntity.getId());
+    }
+}

lab2/src/test/java/com/example/demo/GenreServiceTests.java

@@ -0,0 +1,74 @@
+package com.example.demo;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestMethodOrder;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import com.example.demo.genres.model.GenreEntity;
+import com.example.demo.genres.service.GenreService;
+import com.example.demo.core.error.NotFoundException;
+
+@SpringBootTest
+@TestMethodOrder(OrderAnnotation.class)
+public class GenreServiceTests {
+    @Autowired
+    private GenreService genreService;
+
+    @Test
+    void getTest() {
+        Assertions.assertThrows(NotFoundException.class, () -> genreService.get(0));
+    }
+
+    @Test
+    @Order(1)
+    void createTest() {
+        genreService.deleteAll();
+        genreService.create(new GenreEntity(null, "Роман"));
+        genreService.create(new GenreEntity(null, "Комедия"));
+        final GenreEntity last = genreService.create(new GenreEntity(null, "Трагедия"));
+
+        // Проверки, что значения равны. Первый параметр - эталон (ожидаемое значение),
+        // второй - получаемое значение
+        // проверка, что кол-во жанров в хранилище равно кол-ву добавленных (проверка,
+        // что все добавились)
+
+        Assertions.assertEquals(3, genreService.getAll().size());
+        // проверка, что в хранилище последний жанр тот жанр, который добавили последним
+        // (проверка, что всё правильно добавилось)
+        Assertions.assertEquals(last, genreService.get(3));
+    }
+
+    @Test
+    @Order(2)
+    void update() {
+        // на какое название будем менять название жанра
+        final String test = "Антиутопия";
+        // получение последнего в списке жанра
+        final GenreEntity entity = genreService.get(3);
+        // запоминание его названия до обновления
+        final String oldName = entity.getName();
+        // запоминание новых данных жанра
+        final GenreEntity newEntity = genreService.update(3, new GenreEntity(1, test));
+        // Проверка, что название поменялось
+        Assertions.assertEquals(test, newEntity.getName());
+        Assertions.assertNotEquals(oldName, newEntity.getName());
+    }
+
+    @Test
+    @Order(3)
+    void delete() {
+        genreService.delete(3);
+        // Проверка, что после удаления в хранилище осталось 2 жанра
+        Assertions.assertEquals(2, genreService.getAll().size());
+
+        final GenreEntity newEntity = genreService.create(new GenreEntity(null, "Стратегия"));
+        // Проверка, что в хранилище теперь снова 3 жанра
+        Assertions.assertEquals(3, genreService.getAll().size());
+        // Проверка, что id у добавленного жанра стал 4
+        Assertions.assertEquals(4, newEntity.getId());
+    }
+}

lab2/src/test/java/com/example/demo/UserServiceTests.java

@@ -0,0 +1,98 @@
+package com.example.demo;
+
+import org.junit.jupiter.api.TestMethodOrder;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import com.example.demo.books.model.BookEntity;
+import com.example.demo.books.service.BookService;
+import com.example.demo.core.error.NotFoundException;
+import com.example.demo.genres.model.GenreEntity;
+import com.example.demo.genres.service.GenreService;
+import com.example.demo.users.model.UserEntity;
+import com.example.demo.users.service.UserService;
+
+@SpringBootTest
+@TestMethodOrder(OrderAnnotation.class)
+public class UserServiceTests {
+    @Autowired
+    private UserService userService;
+    @Autowired
+    private BookService bookService;
+    @Autowired
+    private GenreService genreService;
+
+    @Test
+    void getTest() {
+        Assertions.assertThrows(NotFoundException.class, () -> userService.get(0));
+    }
+
+    @Test
+    @Order(1)
+    void createTest() {
+        genreService.deleteAll();
+        bookService.deleteAll();
+
+        genreService.create(new GenreEntity(null, "Роман"));
+        genreService.create(new GenreEntity(null, "Комедия"));
+        genreService.create(new GenreEntity(null, "Трагедия"));
+
+        bookService.create(new BookEntity(null, genreService.get(1), "Гордость и предубеждение", null, null, null));
+        bookService.create(new BookEntity(null, genreService.get(2), "Недоросль", null, null, null));
+        bookService.create(new BookEntity(null, genreService.get(3), "Грозовой перевал", null, null, null));
+
+        userService.create(new UserEntity(null, "Пупа", "password", false));
+        userService.create(new UserEntity(null, "Лупа", "password", false));
+
+        Assertions.assertEquals(2, userService.getAll().size());
+    }
+
+    @Test
+    @Order(2)
+    void update() {
+        // на какой ник будем менять ник пользователя
+        final String testName = "Вася";
+
+        // на какой пароль будем менять пароль пользователя
+        final String testPassword = "TEST PASSWORD";
+
+        // запоминание обновлённого пользователя
+        final UserEntity newEntity = userService.update(1, new UserEntity(1, testName, testPassword, true));
+
+        // Проверка, что кол-во пользователей до сих пор 2
+        Assertions.assertEquals(2, userService.getAll().size());
+
+        Assertions.assertEquals(newEntity, userService.get(1));
+
+        // Проверка, что у пользователя нет игр
+        Assertions.assertEquals(0, userService.get(1).getBooks().size());
+
+        // Добавление пользователю 2 игр
+        userService.addBook(1, bookService.get(3));
+        userService.addBook(1, bookService.get(2));
+        // Проверка, что у пользователя теперь есть 2 игры
+        Assertions.assertEquals(2, userService.get(1).getBooks().size());
+
+        // Удаление у пользователя игры
+        userService.deleteBook(1, bookService.get(2));
+        // Проверка, что у пользователя 1 игра
+        Assertions.assertEquals(1, userService.get(1).getBooks().size());
+    }
+
+    @Test
+    @Order(3)
+    void delete() {
+        userService.delete(1);
+        // Проверка, что после удаления в хранилище осталcя пользователей
+        Assertions.assertEquals(1, userService.getAll().size());
+
+        userService.create(new UserEntity(null, "Пупа", "password", false));
+        // Проверка, что в хранилище теперь снова 2 пользователя
+        Assertions.assertEquals(2, userService.getAll().size());
+    }
+}