org.sonar.api.utils.log.LogTester Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of sonar-plugin-api Show documentation
The newest version!
/*
 * SonarQube
 * Copyright (C) 2009-2022 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.api.utils.log;

import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

/**
 * For tests only
 * 

 * This JUnit rule allows to configure and access logs in tests. By default
 * trace level is enabled.
 * 

 * Warning - not compatible with parallel execution of tests in the same JVM fork.
 * 

 * Example:
 *  * public class MyClass {
 *   private final Logger logger = Loggers.get("logger_name");
 *
 *   public void doSomething() {
 *     logger.info("foo");
 *   }
 * }
 *
 * public class MyTest {
 *   @org.junit.Rule
 *   public LogTester logTester = new LogTester();
 *
 *   @org.junit.Test
 *   public void test_log() {
 *     new MyClass().doSomething();
 *
 *     assertThat(logTester.logs()).containsOnly("foo");
 *   }
 * }
 * 
 *
 * @since 5.1
 */
public class LogTester extends AbstractLogTester implements TestRule {
  public Statement apply(Statement base, Description description) {
    return statement(base);
  }

  private Statement statement(final Statement base) {
    return new Statement() {
      @Override
      public void evaluate() throws Throwable {
        before();
        try {
          base.evaluate();
        } finally {
          after();
        }
      }
    };
  }
}