content: /*******************************************************************************
   * Copyright (c) 2009, 2019 Mountainminds GmbH & Co. KG and Contributors
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *    Marc R. Hoffmann - initial API and implementation
   *
   *******************************************************************************/
  package org.jacoco.cli.internal.commands;
  
  import static org.junit.Assert.assertEquals;
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.jacoco.cli.internal.CommandTestBase;
  import org.jacoco.core.data.ExecutionData;
  import org.jacoco.core.data.ExecutionDataWriter;
  import org.jacoco.core.tools.ExecFileLoader;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  
  /**
   * Unit tests for {@link Merge}.
   */
  public class MergeTest extends CommandTestBase {
  
  	@Rule
  	public TemporaryFolder tmp = new TemporaryFolder();
  
  	@Test
  	public void should_print_usage_when_no_options_are_given()
  			throws Exception {
  		execute("merge");
  
  		assertFailure();
  		assertContains("\"--destfile\"", err);
  		assertContains("java -jar jacococli.jar merge [<execfiles> ...]", err);
  	}
  
  	@Test
  	public void should_print_warning_when_no_exec_files_are_provided()
  			throws Exception {
  		File dest = new File(tmp.getRoot(), "merged.exec");
  		execute("merge", "--destfile", dest.getAbsolutePath());
  
  		assertOk();
  		assertContains("[WARN] No execution data files provided.", out);
  		Set<String> names = loadExecFile(dest);
  		assertEquals(Collections.emptySet(), names);
  	}
  
  	@Test
  	public void should_merge_exec_files() throws Exception {
  		File a = createExecFile("a");
  		File b = createExecFile("b");
  		File c = createExecFile("c");
  		File dest = new File(tmp.getRoot(), "merged.exec");
  
  		execute("merge", "--destfile", dest.getAbsolutePath(),
  				a.getAbsolutePath(), b.getAbsolutePath(), c.getAbsolutePath());
  
  		assertOk();
  		Set<String> names = loadExecFile(dest);
  		assertEquals(new HashSet<String>(Arrays.asList("a", "b", "c")), names);
  	}
  
  	private File createExecFile(String name) throws IOException {
  		File file = new File(tmp.getRoot(), name + ".exec");
  		final FileOutputStream execout = new FileOutputStream(file);
  		ExecutionDataWriter writer = new ExecutionDataWriter(execout);
  		writer.visitClassExecution(new ExecutionData(name.hashCode(), name,
  				new boolean[] { true }));
  		execout.close();
  		return file;
  	}
  
  	private Set<String> loadExecFile(File file) throws IOException {
  		ExecFileLoader loader = new ExecFileLoader();
  		loader.load(file);
  		Set<String> names = new HashSet<String>();
  		for (ExecutionData d : loader.getExecutionDataStore().getContents()) {
  			names.add(d.getName());
  		}
  		return names;
  	}
  
  }
  