initial tests

application/module-exercise/src/test/java/org/fuseri/moduleexercise/exercise/ExerciseTest.java

+package org.fuseri.moduleexercise.exercise;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.persistence.EntityNotFoundException;
+import org.fuseri.model.dto.exercise.ExerciseCreateDto;
+import org.fuseri.model.dto.exercise.ExerciseDto;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.equalTo;
+//import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.patch;
+//import static org.assertj.core.api.ClassBasedNavigableIterableAssert.assertThat;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+
+
+
+@SpringBootTest
+@AutoConfigureMockMvc
+public class ExerciseTest {
+    @Autowired
+    ObjectMapper objectMapper;
+    @Autowired
+    private MockMvc mockMvc;
+
+    public static String asJsonString(final Object obj) {
+        try {
+            return new ObjectMapper().writeValueAsString(obj);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+
+
+    @Test
+    void getExercise() {
+        var postExercise = new ExerciseCreateDto("idioms","exercise on basic idioms",2,"0");
+
+        String id = "";
+
+        try {
+           var dis = mockMvc.perform(post("/exercises")
+                    .content(asJsonString(postExercise))
+                    .contentType(MediaType.APPLICATION_JSON));
+           var ok = dis.andReturn().getResponse().getContentAsString();
+
+            var ll = objectMapper.readValue(ok,ExerciseDto.class);
+
+            id = ll.getId();
+        }
+             catch (Exception e) {
+            assert(false);
+        }
+
+
+//      no underlying database
+        try {
+            var theId = String.format("/exercises/%s",id);
+            var smth = mockMvc.perform(get(theId));
+
+        } catch (Exception e) {
+//            throw new RuntimeException(e);
+        }
+
+
+    }
+
+    @Test
+    void testCreateExercise() throws Exception {
+        var expectedResponse = new ExerciseDto();
+
+
+
+        var postExercise = new ExerciseCreateDto("idioms","exercise on basic idioms",2,"0");
+
+        mockMvc.perform(post("/exercises")
+                        .content(asJsonString(postExercise))
+                        .contentType(MediaType.APPLICATION_JSON))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.name").value("idioms"))
+                .andExpect(jsonPath("$.description").value("exercise on basic idioms"))
+                .andExpect(jsonPath("$.difficulty").value(2))
+                .andExpect(jsonPath("$.courseId").value("0"))
+                .andReturn().getResponse().getContentAsString();
+    }
+
+}