BAEL-1273: add two test of the articles feed controller

spring-mvc-simple/src/main/java/com/baeldung/spring/configuration/ApplicationConfiguration.java

@@ -24,7 +24,7 @@ import java.util.List;
 @Configuration
 @EnableWebMvc
 @ComponentScan(basePackages = { "com.baeldung.springmvcforms", "com.baeldung.spring.controller", "com.baeldung.spring.validator" })
-class ApplicationConfiguration extends WebMvcConfigurerAdapter {
+public class ApplicationConfiguration extends WebMvcConfigurerAdapter {
 
     @Override
     public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {

spring-mvc-simple/src/test/java/com/baeldung/controller/rss/ArticleRssIntegrationTest.java

@@ -0,0 +1,45 @@
+package com.baeldung.controller.rss;
+
+import com.baeldung.spring.configuration.ApplicationConfiguration;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.junit.jupiter.web.SpringJUnitWebConfig;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+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;
+
+@SpringJUnitWebConfig(ApplicationConfiguration.class)
+public class ArticleRssIntegrationTest {
+    public static final String APPLICATION_RSS_XML = "application/rss+xml";
+    public static final String APPLICATION_RSS_JSON = "application/rss+json";
+    public static final String APPLICATION_RSS_XML_CHARSET_UTF_8 = "application/rss+xml;charset=UTF-8";
+
+    @Autowired
+    private WebApplicationContext webAppContext;
+    private MockMvc mockMvc;
+
+    @BeforeEach
+    public void setup() {
+        mockMvc = MockMvcBuilders.webAppContextSetup(webAppContext)
+            .build();
+    }
+
+    @Test
+    public void whenRequestingXMLFeed_thenContentTypeIsOk() throws Exception {
+        mockMvc.perform(get("/rss2").accept(APPLICATION_RSS_XML))
+            .andExpect(status().isOk())
+            .andExpect(content().contentType(APPLICATION_RSS_XML_CHARSET_UTF_8));
+    }
+
+    @Test
+    public void whenRequestingJSONFeed_thenContentTypeIsOk() throws Exception {
+        mockMvc.perform(get("/rss2").accept(APPLICATION_RSS_JSON))
+            .andExpect(status().isOk())
+            .andExpect(content().contentType(APPLICATION_RSS_JSON));
+    }
+}