Add first correct test

Author: zahar.kalosha

src/test/java/com/example/postgresdemo/controller/QuestionControllerTest.java

@@ -2,44 +2,100 @@
 
 import com.example.postgresdemo.model.Question;
 import com.example.postgresdemo.repository.QuestionRepository;
+
+import org.hamcrest.Matchers;
 import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageImpl;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.http.MediaType;
 import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.ResultMatcher;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
 import org.springframework.web.context.WebApplicationContext;
 
+
+import java.util.Arrays;
 import java.util.List;
 
-import static org.junit.Assert.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.mockito.Mockito.when;
+import static org.springframework.test.web.client.match.MockRestRequestMatchers.jsonPath;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@SpringBootTest
 
-//@SpringBootTest
-//@WebMvcTest
-@WebMvcTest(QuestionController.class)
+@AutoConfigureMockMvc
 public class QuestionControllerTest {
-//    private QuestionRepository questionRepository;
+    @Autowired
+    private QuestionRepository questionRepository;
 
     @Autowired
     private WebApplicationContext webApplicationContext;
 
     @Autowired
     private MockMvc mockMvc;
+    @Autowired
+    private QuestionController questionController;
 
     @Test
     public void testCreateMockMvc() {
         assertNotNull(mockMvc);
     }
 
+    private boolean fillQuestions(Integer number) {
+        try {
+            for (int i = 0; i < number; i++) {
+                Question question = new Question();
+                question.setTitle("Question " + i);
+                question.setDescription("Description " + i);
+                questionRepository.save(question);
+            }
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    private boolean deleteQuestions() {
+        try {
+            questionRepository.deleteAll();
+            return true;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
     @Test
     public void testGetQuestions() throws Exception {
-//        when(questionRepository.findAll()).thenReturn(List.of(new Question()));
+        for (int assertionNumber = 0; assertionNumber < 100; assertionNumber++) {
+            int pageSize = 20;
 
-        this.mockMvc
-                .perform(MockMvcRequestBuilders.get("/questions"))
-                .andExpect(MockMvcResultMatchers.status().isOk());
+            if (!fillQuestions(assertionNumber)) {
+                throw new Exception("Failed to fill questions");
+            }
+
+            mockMvc.perform(get("/questions")
+                            .contentType(MediaType.APPLICATION_JSON))
+                    .andExpect(status().isOk())
+                    .andExpect(content().contentType(MediaType.APPLICATION_JSON_VALUE))
+                    .andExpect(MockMvcResultMatchers.jsonPath("$.content.length()", Matchers.equalTo(Math.min(assertionNumber, pageSize))))
+                    .andExpect(MockMvcResultMatchers.jsonPath("$.totalElements", Matchers.equalTo(assertionNumber))) // Assert total elements
+                    .andExpect(MockMvcResultMatchers.jsonPath("$.totalPages", Matchers.equalTo((int) Math.ceil(assertionNumber / (double) pageSize)))); // Assert total pages for 10 items per page
+
+            if (!deleteQuestions()) {
+                throw new Exception("Failed to delete questions");
+            }
+        }
     }
+
 }