org.jacoco.cli.test/src/org/jacoco/cli/internal/MainTest.java

/*******************************************************************************
 * Copyright (c) 2009, 2017 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;

import org.junit.Test;

/**
 * Unit tests for {@link Main}.
 */
public class MainTest extends CommandTestBase {

	@Test
	public void should_print_usage_when_no_arguments_given() throws Exception {
		execute();

		assertFailure();
		assertNoOutput(out);
		assertContains("Argument \"<command>\" is required", err);
		assertContains("Usage: java -jar jacococli.jar -help | <command>", err);
		assertContains("Command line interface for JaCoCo.", err);
	}

	@Test
	public void should_print_error_message_when_invalid_command_is_given()
			throws Exception {
		execute("foo");

		assertFailure();
		assertNoOutput(out);
		assertContains("\"foo\" is not a valid value for \"<command>\"", err);
		assertContains("Usage: java -jar jacococli.jar -help | <command>", err);
	}

	@Test
	public void should_print_general_usage_when_help_option_is_given()
			throws Exception {
		execute("-help");

		assertOk();
		assertNoOutput(err);
		assertContains("Usage: java -jar jacococli.jar -help | <command>", out);
		assertContains("<command> : dump|instrument|merge|report", out);
	}

	@Test
	public void should_print_command_usage_when_command_and_help_option_is_given()
			throws Exception {
		execute("dump", "-help");

		assertOk();
		assertNoOutput(err);
		assertContains("Usage: java -jar jacococli.jar dump", out);
		assertContains(
				"Request execution data from a JaCoCo agent running in 'tcpserver' output mode.",
				out);
	}

	@Test
	public void should_not_print_any_output_when_quiet_option_is_given()
			throws Exception {
		execute("version", "-quiet");

		assertOk();
		assertNoOutput(out);
		assertNoOutput(err);
	}

}