Test case for unsupported media type error

spring-boot-rest-2/src/test/java/com/baeldung/unsupportedmedia/ApplicationTest.java

@@ -0,0 +1,59 @@
+package com.baeldung.unsupportedmedia;
+
+import com.baeldung.unsupportedmediatype.UserController;
+import org.junit.jupiter.api.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@RunWith(SpringRunner.class)
+@WebMvcTest(UserController.class)
+public class ApplicationTest {
+    @Autowired
+    private MockMvc mockMvc;
+
+    @Test
+    void JsonTestCase() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.post("/user/")
+                        .contentType(MediaType.APPLICATION_JSON_VALUE)
+                        .content("{\n" +
+                                "    \"name\": \"Andy\",\n" +
+                                "    \"age\": 1,\n" +
+                                "    \"address\": \"Hello world\"\n" +
+                                "}"))
+                .andExpect(status().isOk());
+    }
+
+    @Test
+    void JsonFailTestCase() throws Exception {// Because no content-type added
+        mockMvc.perform(MockMvcRequestBuilders.post("/user/")
+                        .content("{\n" +
+                                "    \"name\": \"Andy\",\n" +
+                                "    \"age\": 1,\n" +
+                                "    \"address\": \"Hello world\"\n" +
+                                "}"))
+                .andExpect(status().isUnsupportedMediaType());
+    }
+
+    @Test
+    void XmlTestCase() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.post("/user/")
+                        .contentType(MediaType.APPLICATION_XML_VALUE)
+                        .content("<user><name>Andy</name><age>1</age><address>Hello world</address></user>"))
+                .andExpect(status().isOk());
+    }
+
+    @Test
+    void StringTestCase() throws Exception {
+        mockMvc.perform(MockMvcRequestBuilders.post("/user/")
+                        .contentType(MediaType.TEXT_PLAIN_VALUE)
+                        .content("<user><name>Andy</name><age>1</age><address>Hello world</address></user>"))
+                .andExpect(status().isUnsupportedMediaType());
+    }
+}