JUnitMain.java

/*
 * Copyright 2014-present Facebook, Inc.
 *
 * 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 com.facebook.buck.testrunner;

/**
 * Launcher for JUnit.
 *
 * <p>Expected arguments are:
 *
 * <ul>
 *   <li>(string) output directory
 *   <li>(long) default timeout in milliseconds (0 for no timeout)
 *   <li>(string) newline separated list of test selectors
 *   <li>(string...) fully-qualified names of test classes
 * </ul>
 *
 * <p>IMPORTANT! This class limits itself to types that are available in both the JDK and Android
 * Java API. The objective is to limit the set of files added to the ClassLoader that runs the test,
 * as not to interfere with the results of the test.
 */
public class JUnitMain {

  private JUnitMain() {
    // Launcher class.
  }

  public static void main(String[] args) {
    // Ensure that both junit and hamcrest are on the classpath
    CheckDependency.isPresent("junit", "org.junit.Test");
    CheckDependency.isPresent("hamcrest", "org.hamcrest.Description");

    JUnitRunner runner = new JUnitRunner();
    runner.parseArgs(args);
    runner.runAndExit();
  }
}