оно работает!!!

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

@@ -0,0 +1,63 @@
+package com.example.demo.DemoApplicationTests;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.ArrayList;
+
+    @SpringBootTest
+    class PostsServiceTest {
+        @Autowired
+        private PostService newsService;
+
+        @Autowired
+        private TageService tageService;
+
+        List<TageEntity> tages = new ArrayList<>();
+
+        @AfterEach
+        void removeData() {
+            newsService.getAll().forEach(item -> newsService.delete(item.getId()));
+            tageService.getAll().forEach(i -> tageService.delete(i.getId()));
+        }
+
+        @Test
+        void getTest() {
+            Assertions.assertThrows(NotFoundException.class, () -> newsService.get(0L));
+        }
+
+        @Test
+        void CreateUpdateDelete() {
+            //create
+            removeData();
+
+            var tage1 = tageService.create(new TageEntity("праздник"));
+            var tage2 = tageService.create(new TageEntity("сессия"));
+            tages.add(tage1);
+            tages.add(tage2);
+
+            // create
+            var post1 = newsService.create(new PostEntity(
+                    "Название", new Date(), "текст новости", tages));
+            var post2 = newsService.create(new PostEntity(
+                    "9 апреля", new Date(), "просто наступил апрель", tages));
+
+            Assertions.assertEquals(2L, newsService.getAll().size());
+
+            //update
+            var post2new = newsService.update(post2.getId(), new PostEntity(
+                    "2 июня", new Date(), "просто наступил ИЮНЬ"
+            ));
+            Assertions.assertEquals(2L, newsService.getAll().size());
+
+            // delete
+            newsService.delete(post2new.getId());
+            Assertions.assertEquals(1L, newsService.getAll().size());
+            final var lastNew = newsService.get(post1.getId());
+            Assertions.assertEquals(lastNew.getText(), post1.getText());
+        }
+    }
+}