/*
* 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.devtools.tests;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
/**
* JUnit {@link TestRule} that launched a JVM and redirects its output to a test
* method-specific location.
*
* @author Andy Wilkinson
*/
class JvmLauncher implements TestRule {
private File outputDirectory;
@Override
public Statement apply(Statement base, Description description) {
this.outputDirectory = new File("target/output/"
+ description.getMethodName().replaceAll("[^A-Za-z]+", ""));
this.outputDirectory.mkdirs();
return base;
}
LaunchedJvm launch(String name, String classpath, String... args) throws IOException {
List<String> command = new ArrayList<>(Arrays
.asList(System.getProperty("java.home") + "/bin/java", "-cp", classpath));
command.addAll(Arrays.asList(args));
File standardOut = new File(this.outputDirectory, name + ".out");
Process process = new ProcessBuilder(command.toArray(new String[command.size()]))
.redirectError(new File(this.outputDirectory, name + ".err"))
.redirectOutput(standardOut).start();
return new LaunchedJvm(process, standardOut);
}
static class LaunchedJvm {
private final Process process;
private final File standardOut;
LaunchedJvm(Process process, File standardOut) {
this.process = process;
this.standardOut = standardOut;
}
Process getProcess() {
return this.process;
}
File getStandardOut() {
return this.standardOut;
}
}
}