Add tests for CompressionConnectorCustomizer

Closes gh-16515

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/tomcat/CompressionConnectorCustomizerTests.java

+/*
+ * Copyright 2012-2019 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
+ *
+ *      https://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.boot.web.embedded.tomcat;
+
+import org.apache.catalina.connector.Connector;
+import org.apache.coyote.http11.AbstractHttp11Protocol;
+import org.apache.coyote.http2.Http2Protocol;
+import org.junit.Before;
+import org.junit.Test;
+
+import org.springframework.boot.web.server.Compression;
+import org.springframework.util.unit.DataSize;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link CompressionConnectorCustomizer}
+ *
+ * @author Rudy Adams
+ */
+public class CompressionConnectorCustomizerTests {
+
+	private static final int MIN_SIZE = 100;
+
+	private final String[] mimeTypes = { "text/html", "text/xml", "text/xhtml" };
+
+	private final String[] excludedUserAgents = { "SomeUserAgent", "AnotherUserAgent" };
+
+	private Compression compression;
+
+	@Before
+	public void setup() {
+		this.compression = new Compression();
+		this.compression.setEnabled(true);
+		this.compression.setMinResponseSize(DataSize.ofBytes(MIN_SIZE));
+		this.compression.setMimeTypes(this.mimeTypes);
+		this.compression.setExcludedUserAgents(this.excludedUserAgents);
+	}
+
+	@Test
+	public void shouldCustomizeCompressionForHttp1AndHttp2Protocol() {
+		CompressionConnectorCustomizer compressionConnectorCustomizer = new CompressionConnectorCustomizer(
+				this.compression);
+		Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
+		connector.addUpgradeProtocol(new Http2Protocol());
+		compressionConnectorCustomizer.customize(connector);
+		AbstractHttp11Protocol abstractHttp11Protocol = (AbstractHttp11Protocol) connector
+				.getProtocolHandler();
+		verifyHttp1(abstractHttp11Protocol);
+		Http2Protocol http2Protocol = (Http2Protocol) connector.findUpgradeProtocols()[0];
+		verifyHttp2Upgrade(http2Protocol);
+	}
+
+	private void verifyHttp1(AbstractHttp11Protocol protocol) {
+		compressionOn(protocol.getCompression());
+		minSize(protocol.getCompressionMinSize());
+		mimeType(protocol.getCompressibleMimeTypes());
+		excludedUserAgents(protocol.getNoCompressionUserAgents());
+	}
+
+	private void verifyHttp2Upgrade(Http2Protocol protocol) {
+		compressionOn(protocol.getCompression());
+		minSize(protocol.getCompressionMinSize());
+		mimeType(protocol.getCompressibleMimeTypes());
+		excludedUserAgents(protocol.getNoCompressionUserAgents());
+		excludedUserAgents(protocol.getNoCompressionUserAgents());
+	}
+
+	private void compressionOn(String compression) {
+		assertThat(compression).isEqualTo("on");
+	}
+
+	private void minSize(int minSize) {
+		assertThat(minSize).isEqualTo(MIN_SIZE);
+	}
+
+	private void mimeType(String[] mimeTypes) {
+		assertThat(mimeTypes).isEqualTo(mimeTypes);
+	}
+
+	private void excludedUserAgents(String combinedUserAgents) {
+		assertThat(combinedUserAgents).isEqualTo("SomeUserAgent,AnotherUserAgent");
+	}
+
+}