/*
 * Copyright 2012-2017 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * Thermostat 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.common.cli;

import static com.redhat.thermostat.testutils.Asserts.assertCommandIsRegistered;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.mock;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.osgi.framework.InvalidSyntaxException;

import com.redhat.thermostat.testutils.StubBundleContext;

public class CommandRegistryImplTest {

    private CommandRegistryImpl commandRegistry;

    private StubBundleContext bundleContext;

    @Before
    public void setUp() {
        bundleContext = new StubBundleContext();
        commandRegistry = new CommandRegistryImpl(bundleContext);
    }

    @After
    public void tearDown() {
        bundleContext = null;
    }

    @Test
    public void testRegisterCommands() {
        Command cmd1 = mock(Command.class);
        String name1 = "test1";
        Command cmd2 = mock(Command.class);
        String name2 = "test2";

        commandRegistry.registerCommand(name1, cmd1);
        commandRegistry.registerCommand(name2, cmd2);

        assertCommandIsRegistered(bundleContext, "test1", cmd1.getClass());
        assertCommandIsRegistered(bundleContext, name2, cmd2.getClass());

        assertEquals(2, bundleContext.getAllServices().size());
    }

    @Test
    public void testUnregisterCommand() throws InvalidSyntaxException {
        Command cmd1 = mock(Command.class);
        String name1 = "test1";
        Command cmd2 = mock(Command.class);
        String name2 = "test2";

        commandRegistry.registerCommand(name1, cmd1);
        commandRegistry.registerCommand(name2, cmd2);

        assertEquals(2, bundleContext.getAllServices().size());

        commandRegistry.unregisterCommands();

        assertEquals(0, bundleContext.getAllServices().size());
    }
    
    @Test
    public void testUnregisterCommandsMultipleTimes() {
        Command cmd1 = mock(Command.class);
        String name1 = "test1";
        Command cmd2 = mock(Command.class);
        String name2 = "test2";

        commandRegistry.registerCommand(name1, cmd1);
        commandRegistry.registerCommand(name2, cmd2);

        assertEquals(2, bundleContext.getAllServices().size());

        commandRegistry.unregisterCommands();

        assertEquals(0, bundleContext.getAllServices().size());
        
        try {
            commandRegistry.unregisterCommands();
            // pass
        } catch (Exception e) {
            e.printStackTrace();
            fail("unregistering commands should have cleared services registrations");
        }
        assertEquals(0, bundleContext.getAllServices().size());
    }

}