/*
 * 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());
	}

	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(this.mimeTypes);
	}

	private void excludedUserAgents(String combinedUserAgents) {
		assertThat(combinedUserAgents).isEqualTo("SomeUserAgent,AnotherUserAgent");
	}

}
