/*
 * Copyright 2012-2017 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.boot.gradle.docs;

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

import org.junit.Rule;
import org.junit.Test;

import org.springframework.boot.gradle.testkit.GradleBuild;
import org.springframework.util.FileCopyUtils;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * Tests for the packaging documentation.
 *
 * @author Andy Wilkinson
 */
public class PackagingDocumentationTests {

	@Rule
	public GradleBuild gradleBuild = new GradleBuild();

	@Test
	public void warContainerDependencyEvaluatesSuccessfully() {
		this.gradleBuild
				.script("src/main/gradle/packaging/war-container-dependency.gradle")
				.build();
	}

	@Test
	public void bootJarMainClass() throws IOException {
		this.gradleBuild.script("src/main/gradle/packaging/boot-jar-main-class.gradle")
				.build("bootJar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".jar");
		assertThat(file).isFile();
		try (JarFile jar = new JarFile(file)) {
			assertThat(jar.getManifest().getMainAttributes().getValue("Start-Class"))
					.isEqualTo("com.example.ExampleApplication");
		}
	}

	@Test
	public void bootJarManifestMainClass() throws IOException {
		this.gradleBuild
				.script("src/main/gradle/packaging/boot-jar-manifest-main-class.gradle")
				.build("bootJar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".jar");
		assertThat(file).isFile();
		try (JarFile jar = new JarFile(file)) {
			assertThat(jar.getManifest().getMainAttributes().getValue("Start-Class"))
					.isEqualTo("com.example.ExampleApplication");
		}
	}

	@Test
	public void applicationPluginMainClass() throws IOException {
		this.gradleBuild
				.script("src/main/gradle/packaging/application-plugin-main-class.gradle")
				.build("bootJar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".jar");
		assertThat(file).isFile();
		try (JarFile jar = new JarFile(file)) {
			assertThat(jar.getManifest().getMainAttributes().getValue("Start-Class"))
					.isEqualTo("com.example.ExampleApplication");
		}
	}

	@Test
	public void bootWarIncludeDevtools() throws IOException {
		new File(this.gradleBuild.getProjectDir(),
				"spring-boot-devtools-1.2.3.RELEASE.jar").createNewFile();
		this.gradleBuild
				.script("src/main/gradle/packaging/boot-war-include-devtools.gradle")
				.build("bootWar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".war");
		assertThat(file).isFile();
		try (JarFile jar = new JarFile(file)) {
			assertThat(jar.getEntry("WEB-INF/lib/spring-boot-devtools-1.2.3.RELEASE.jar"))
					.isNotNull();
		}
	}

	@Test
	public void bootJarRequiresUnpack() throws IOException {
		this.gradleBuild
				.script("src/main/gradle/packaging/boot-jar-requires-unpack.gradle")
				.build("bootJar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".jar");
		assertThat(file).isFile();
		try (JarFile jar = new JarFile(file)) {
			JarEntry entry = jar.getJarEntry("BOOT-INF/lib/jruby-complete-1.7.25.jar");
			assertThat(entry).isNotNull();
			assertThat(entry.getComment()).startsWith("UNPACK:");
		}
	}

	@Test
	public void bootJarIncludeLaunchScript() throws IOException {
		this.gradleBuild
				.script("src/main/gradle/packaging/boot-jar-include-launch-script.gradle")
				.build("bootJar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".jar");
		assertThat(file).isFile();
		assertThat(FileCopyUtils.copyToString(new FileReader(file)))
				.startsWith("#!/bin/bash");
	}

	@Test
	public void bootJarLaunchScriptProperties() throws IOException {
		this.gradleBuild
				.script("src/main/gradle/packaging/boot-jar-launch-script-properties.gradle")
				.build("bootJar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".jar");
		assertThat(file).isFile();
		assertThat(FileCopyUtils.copyToString(new FileReader(file)))
				.contains("example-app.log");
	}

	@Test
	public void bootJarCustomLaunchScript() throws IOException {
		File customScriptFile = new File(this.gradleBuild.getProjectDir(),
				"src/custom.script");
		customScriptFile.getParentFile().mkdirs();
		FileCopyUtils.copy("custom", new FileWriter(customScriptFile));
		this.gradleBuild
				.script("src/main/gradle/packaging/boot-jar-custom-launch-script.gradle")
				.build("bootJar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".jar");
		assertThat(file).isFile();
		assertThat(FileCopyUtils.copyToString(new FileReader(file))).startsWith("custom");
	}

	@Test
	public void bootWarPropertiesLauncher() throws IOException {
		this.gradleBuild
				.script("src/main/gradle/packaging/boot-war-properties-launcher.gradle")
				.build("bootWar");
		File file = new File(this.gradleBuild.getProjectDir(),
				"build/libs/" + this.gradleBuild.getProjectDir().getName() + ".war");
		assertThat(file).isFile();
		try (JarFile jar = new JarFile(file)) {
			assertThat(jar.getManifest().getMainAttributes().getValue("Main-Class"))
					.isEqualTo("org.springframework.boot.loader.PropertiesLauncher");
		}
	}

}
