BAEL-4085: First Draft completed (#9532)

* BAEL-4085: First Draft completed

* BAEL-4085: used ternary operator for if condition

Co-authored-by: Vikas Ramsingh Rajput <vikas.rajput@crownconsult.com>

spring-mvc-java-2/src/main/java/com/baeldung/multiparttesting/MultipartPostRequestController.java

@@ -0,0 +1,17 @@
+package com.baeldung.multiparttesting;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+@RestController
+public class MultipartPostRequestController {
+
+    @PostMapping(path = "/upload")
+    public ResponseEntity<String> uploadFile(@RequestParam("file") MultipartFile file) {
+        return file.isEmpty() ? new ResponseEntity<String>(HttpStatus.NOT_FOUND) : new ResponseEntity<String>(HttpStatus.OK);
+    }
+}

spring-mvc-java-2/src/test/java/com/baeldung/multiparttesting/MultipartPostRequestUnitTest.java

@@ -0,0 +1,35 @@
+package com.baeldung.multiparttesting;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.multipart;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.mock.web.MockMultipartFile;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import com.baeldung.matrix.config.MatrixWebConfig;
+
+@WebAppConfiguration
+@ContextConfiguration(classes = { MatrixWebConfig.class, MultipartPostRequestController.class })
+@RunWith(SpringJUnit4ClassRunner.class)
+public class MultipartPostRequestUnitTest {
+
+    @Autowired
+    private WebApplicationContext webApplicationContext;
+
+    @Test
+    public void whenFileUploaded_thenVerifyStatus() throws Exception {
+        MockMultipartFile file = new MockMultipartFile("file", "hello.txt", MediaType.TEXT_PLAIN_VALUE, "Hello, World!".getBytes());
+
+        MockMvc mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
+        mockMvc.perform(multipart("/upload").file(file)).andExpect(status().isOk());
+    }
+}