Added example for spring boot exception handling

spring-boot-rest/src/test/java/com/baeldung/errorhandling/boot/ErrorHandlingLiveTest.java

@@ -0,0 +1,65 @@
+package com.baeldung.errorhandling.boot;
+
+import static io.restassured.RestAssured.given;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.hamcrest.Matchers.hasKey;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.isA;
+import static org.hamcrest.Matchers.not;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+
+import com.gargoylesoftware.htmlunit.WebClient;
+import com.gargoylesoftware.htmlunit.html.HtmlPage;
+
+public class ErrorHandlingLiveTest {
+
+    private static final String BASE_URL = "http://localhost:8080";
+    private static final String EXCEPTION_ENDPOINT = "/exception";
+
+    private static final String ERROR_RESPONSE_KEY_PATH = "error";
+    private static final String XML_RESPONSE_KEY_PATH = "xmlkey";
+    private static final String LOCALE_RESPONSE_KEY_PATH = "locale";
+    private static final String CAUSE_RESPONSE_KEY_PATH = "cause";
+    private static final String RESPONSE_XML_ROOT = "Map";
+    private static final String XML_RESPONSE_KEY_XML_PATH = RESPONSE_XML_ROOT + "." + XML_RESPONSE_KEY_PATH;
+    private static final String LOCALE_RESPONSE_KEY_XML_PATH = RESPONSE_XML_ROOT + "." + LOCALE_RESPONSE_KEY_PATH;
+    private static final String CAUSE_RESPONSE_KEY_XML_PATH = RESPONSE_XML_ROOT + "." + CAUSE_RESPONSE_KEY_PATH;
+    private static final String CAUSE_RESPONSE_VALUE = "Error in the faulty controller!";
+    private static final String XML_RESPONSE_VALUE = "the XML response is different!";
+
+    @Test
+    public void whenRequestingFaultyEndpointAsJson_thenReceiveDefaultResponseWithConfiguredAttrs() {
+        given().header(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+            .get(EXCEPTION_ENDPOINT)
+            .then()
+            .body("$", hasKey(LOCALE_RESPONSE_KEY_PATH))
+            .body(CAUSE_RESPONSE_KEY_PATH, is(CAUSE_RESPONSE_VALUE))
+            .body("$", not(hasKey(ERROR_RESPONSE_KEY_PATH)))
+            .body("$", not(hasKey(XML_RESPONSE_KEY_PATH)));
+    }
+
+    @Test
+    public void whenRequestingFaultyEndpointAsXml_thenReceiveXmlResponseWithConfiguredAttrs() {
+        given().header(HttpHeaders.ACCEPT, MediaType.APPLICATION_XML_VALUE)
+            .get(EXCEPTION_ENDPOINT)
+            .then()
+            .body(LOCALE_RESPONSE_KEY_XML_PATH, isA(String.class))
+            .body(CAUSE_RESPONSE_KEY_XML_PATH, is(CAUSE_RESPONSE_VALUE))
+            .body(RESPONSE_XML_ROOT, not(hasKey(ERROR_RESPONSE_KEY_PATH)))
+            .body(XML_RESPONSE_KEY_XML_PATH, is(XML_RESPONSE_VALUE));
+    }
+
+    @Test
+    public void whenRequestingFaultyEndpointAsHtml_thenReceiveWhitelabelPageResponse() throws Exception {
+        try (WebClient webClient = new WebClient()) {
+            webClient.getOptions()
+                .setThrowExceptionOnFailingStatusCode(false);
+            HtmlPage page = webClient.getPage(BASE_URL + EXCEPTION_ENDPOINT);
+            assertThat(page.getBody()
+                .asText()).contains("Whitelabel Error Page");
+        }
+    }
+}

spring-boot-rest/src/test/java/com/baeldung/web/SpringContextIntegrationTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.boot.rest;
+package com.baeldung.web;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;