Test for Feign compression interceptors

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/feign/FeignCompressionTests.java

+/*
+ *
+ *  * Copyright 2013-2017 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.netflix.feign;
+
+import feign.Client;
+import feign.RequestInterceptor;
+import feign.httpclient.ApacheHttpClient;
+
+import java.util.Map;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.cloud.ClassPathExclusions;
+import org.springframework.cloud.FilteredClassPathRunner;
+import org.springframework.cloud.netflix.archaius.ArchaiusAutoConfiguration;
+import org.springframework.cloud.netflix.feign.encoding.FeignAcceptGzipEncodingAutoConfiguration;
+import org.springframework.cloud.netflix.feign.encoding.FeignAcceptGzipEncodingInterceptor;
+import org.springframework.cloud.netflix.feign.encoding.FeignContentGzipEncodingAutoConfiguration;
+import org.springframework.cloud.netflix.feign.encoding.FeignContentGzipEncodingInterceptor;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * @author Ryan Baxter
+ */
+@RunWith(FilteredClassPathRunner.class)
+@ClassPathExclusions({"ribbon-loadbalancer-{version:\\d.*}.jar"})
+public class FeignCompressionTests {
+
+	private ConfigurableApplicationContext context;
+
+	@Before
+	public void setUp() {
+		context = new SpringApplicationBuilder().properties("feign.compression.response.enabled=true",
+				"feign.compression.request.enabled=true", "feign.okhttp.enabled=false").sources(PropertyPlaceholderAutoConfiguration.class,
+				ArchaiusAutoConfiguration.class, FeignAutoConfiguration.class, PlainConfig.class, FeignContentGzipEncodingAutoConfiguration.class,
+				FeignAcceptGzipEncodingAutoConfiguration.class).web(false).run();
+	}
+
+	@After
+	public void tearDown() {
+		if(context != null) {
+			context.close();
+		}
+	}
+
+	@Test
+	public void testInterceptors() {
+		FeignContext feignContext = context.getBean(FeignContext.class);
+		Map<String, RequestInterceptor> interceptors = feignContext.getInstances("foo", RequestInterceptor.class);
+		assertEquals(2, interceptors.size());
+		assertTrue(FeignAcceptGzipEncodingInterceptor.class.isInstance(interceptors.get("feignAcceptGzipEncodingInterceptor")));
+		assertTrue(FeignContentGzipEncodingInterceptor.class.isInstance(interceptors.get("feignContentGzipEncodingInterceptor")));
+	}
+
+	@Configuration
+	protected static class PlainConfig {
+
+		@Autowired
+		private Client client;
+
+		@Bean
+		public ApacheHttpClient client() {
+			/* We know our client is an AppacheHttpClient because we disabled the OK HTTP client.  FeignAcceptGzipEncodingAutoConfiguration
+			 * won't load unless there is a bean of type ApacheHttpClient (not Client) in this test because the bean is not
+			 * yet created and so the application context doesnt know that the Client bean is actually an instance of ApacheHttpClient,
+			 * therefore FeignAcceptGzipEncodingAutoConfiguration will not be loaded.  We just create a bean here of type
+			 * ApacheHttpClient so that the configuration will be loaded correctly.
+			 */
+			return (ApacheHttpClient)client;
+		}
+	}
+}