/*******************************************************************************
 *
 * Copyright (c) 2011 Oracle Corporation.
 *
 * 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:
 *
 *    Anton Kozak
 *
 *******************************************************************************/
package hudson.scm;

import hudson.FilePath;
import hudson.Launcher;
import hudson.model.AbstractBuild;
import hudson.model.AbstractProject;
import hudson.model.BuildListener;
import hudson.model.TaskListener;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

import static org.junit.Assert.assertEquals;

/**
 * Test to verify {@link NullSCM}
 */
@RunWith(Parameterized.class)
public class NullScmTest {
    private SCM scm1;
    private SCM scm2;
    private boolean expectedResult;

    public NullScmTest(SCM scm1, SCM scm2, boolean expectedResult) {
        this.scm1 = scm1;
        this.scm2 = scm2;
        this.expectedResult = expectedResult;
    }

    @Parameterized.Parameters
    public static Collection generateData() {
        return Arrays.asList(new Object[][]{
            {new NullSCM(), new NullSCM(), true},
            {new NullSCM(), null, false},
            {new NullSCM(), new FakeSCM(), false}
        });

    }

    @Test
    public void testEquals() {
        assertEquals(expectedResult, scm1.equals(scm2));
    }

    @Test
    public void testHashCode() {
        assertEquals(expectedResult, scm1.hashCode() == (scm2 == null? 0: scm2).hashCode());
    }

    private static class FakeSCM extends SCM {
        @Override
        public SCMRevisionState calcRevisionsFromBuild(AbstractBuild<?, ?> build, Launcher launcher,
                                                       TaskListener listener)
            throws IOException, InterruptedException {
            return null;
        }

        @Override
        protected PollingResult compareRemoteRevisionWith(AbstractProject<?, ?> project, Launcher launcher,
                                                          FilePath workspace, TaskListener listener,
                                                          SCMRevisionState baseline)
            throws IOException, InterruptedException {
            return null;
        }

        @Override
        public boolean checkout(AbstractBuild<?, ?> build, Launcher launcher, FilePath workspace,
                                BuildListener listener,
                                File changelogFile) throws IOException, InterruptedException {
            return false;
        }

        @Override
        public ChangeLogParser createChangeLogParser() {
            return null;
        }
    }
}