test: add SwaggerResponseCustomizer unit test, extend CustomerControllerIT with extra scenarios, and add CustomerServiceApplicationIT for context load

Author: barissayli

customer-service/src/test/java/io/github/bsayli/customerservice/CustomerServiceApplicationIT.java

@@ -10,9 +10,9 @@
 @DisplayName("Integration Test: Application Context")
 class CustomerServiceApplicationIT {
 
-    @Test
-    @DisplayName("Spring context should load without issues")
-    void contextLoads() {
-        // If the context fails to start, this test will fail
-    }
-}
+  @Test
+  @DisplayName("Spring context should load without issues")
+  void contextLoads() {
+    // If the context fails to start, this test will fail
+  }
+}

customer-service/src/test/java/io/github/bsayli/customerservice/api/controller/CustomerControllerIT.java

@@ -169,27 +169,24 @@ void deleteCustomer_ok200() throws Exception {
   void createCustomer_badJson_notReadable() throws Exception {
     var malformed = "{ \"name\": \"John\", \"email\": }"; // invalid JSON
 
-    mvc.perform(
-                    post("/v1/customers")
-                            .contentType(MediaType.APPLICATION_JSON)
-                            .content(malformed))
-            .andExpect(status().isBadRequest())
-            .andExpect(content().contentType(MediaType.APPLICATION_JSON))
-            .andExpect(jsonPath("$.message").value("BAD_REQUEST"))
-            .andExpect(jsonPath("$.data.code").value("VALIDATION_FAILED"))
-            .andExpect(jsonPath("$.data.violations").isArray());
+    mvc.perform(post("/v1/customers").contentType(MediaType.APPLICATION_JSON).content(malformed))
+        .andExpect(status().isBadRequest())
+        .andExpect(content().contentType(MediaType.APPLICATION_JSON))
+        .andExpect(jsonPath("$.message").value("BAD_REQUEST"))
+        .andExpect(jsonPath("$.data.code").value("VALIDATION_FAILED"))
+        .andExpect(jsonPath("$.data.violations").isArray());
   }
 
   @Test
   @DisplayName("GET /v1/customers/{id} -> 400 Bad Request on @Min violation (id=0)")
   void getCustomer_constraintViolation_min() throws Exception {
     mvc.perform(get("/v1/customers/{id}", 0)) // @Min(1) violated
-            .andExpect(status().isBadRequest())
-            .andExpect(content().contentType(MediaType.APPLICATION_JSON))
-            .andExpect(jsonPath("$.message").value("BAD_REQUEST"))
-            .andExpect(jsonPath("$.data.code").value("VALIDATION_FAILED"))
-            .andExpect(jsonPath("$.data.violations").isArray())
-            .andExpect(jsonPath("$.data.violations[0].message").exists());
+        .andExpect(status().isBadRequest())
+        .andExpect(content().contentType(MediaType.APPLICATION_JSON))
+        .andExpect(jsonPath("$.message").value("BAD_REQUEST"))
+        .andExpect(jsonPath("$.data.code").value("VALIDATION_FAILED"))
+        .andExpect(jsonPath("$.data.violations").isArray())
+        .andExpect(jsonPath("$.data.violations[0].message").exists());
   }
 
   @Test
@@ -198,11 +195,11 @@ void getCustomer_internalServerError_generic() throws Exception {
     when(customerService.getCustomer(1)).thenThrow(new RuntimeException("Boom"));
 
     mvc.perform(get("/v1/customers/{id}", 1))
-            .andExpect(status().isInternalServerError())
-            .andExpect(content().contentType(MediaType.APPLICATION_JSON))
-            .andExpect(jsonPath("$.message").value("INTERNAL_ERROR"))
-            .andExpect(jsonPath("$.data.code").value("INTERNAL_ERROR"))
-            .andExpect(jsonPath("$.data.message").value("Boom"));
+        .andExpect(status().isInternalServerError())
+        .andExpect(content().contentType(MediaType.APPLICATION_JSON))
+        .andExpect(jsonPath("$.message").value("INTERNAL_ERROR"))
+        .andExpect(jsonPath("$.data.code").value("INTERNAL_ERROR"))
+        .andExpect(jsonPath("$.data.message").value("Boom"));
   }
 
   @AfterEach

customer-service/src/test/java/io/github/bsayli/customerservice/common/openapi/SwaggerResponseCustomizerTest.java

@@ -43,7 +43,7 @@ void shouldNotOverrideExistingSchemas() {
     customizer.customise(openAPI);
 
     Schema<?> result =
-            openAPI.getComponents().getSchemas().get(OpenApiSchemas.SCHEMA_SERVICE_RESPONSE);
+        openAPI.getComponents().getSchemas().get(OpenApiSchemas.SCHEMA_SERVICE_RESPONSE);
     assertSame(existing, result, "Existing schema should remain unchanged");
   }
-}
+}