Adds response timeout test

fixes gh-518

spring-cloud-gateway-core/src/test/java/org/springframework/cloud/gateway/filter/NettyRoutingFilterIntegrationTests.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2013-2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.springframework.cloud.gateway.filter;
+
+import java.util.Map;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.gateway.test.BaseWebClientTests;
+import org.springframework.context.annotation.Import;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(properties = "spring.cloud.gateway.httpclient.response-timeout=3s", webEnvironment = RANDOM_PORT)
+@DirtiesContext
+@SuppressWarnings("unchecked")
+public class NettyRoutingFilterIntegrationTests extends BaseWebClientTests {
+
+	@Test
+	public void responseTimeoutWorks() {
+		testClient.get()
+				.uri("/delay/5")
+				.exchange()
+				.expectStatus().is5xxServerError()
+				.expectBody(Map.class)
+				.consumeWith(result -> {
+					Map body = result.getResponseBody();
+					assertThat(body).containsEntry("message", "Response took longer than timeout: PT3S");
+				});
+	}
+
+	@EnableAutoConfiguration
+	@SpringBootConfiguration
+	@Import(DefaultTestConfig.class)
+	public static class TestConfig {
+	}
+
+}