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package net.sourceforge.cruisecontrol.sourcecontrols;

import java.util.HashMap;
import java.util.Map;

import junit.framework.TestCase;
import net.sourceforge.cruisecontrol.CruiseControlException;
import net.sourceforge.cruisecontrol.util.OSEnvironment;

/**
 * @author <a href="mailto:j.c.yip@computer.org">Jason Che-han Yip</a>
 */
public class ConcurrentVersionsSystemValidationTest extends TestCase {

    private ConcurrentVersionsSystem cvs;

    protected void setUp() throws Exception {
        super.setUp();

        cvs = new ConcurrentVersionsSystem();
    }

    public void testPassesValidationIfCvsrootAndModuleSet() throws Exception {
        cvs.setCvsRoot("cvsroot");
        cvs.setModule("module");

        try {
            cvs.validate();
        } catch (CruiseControlException e) {
            fail("Should not have failed validation");
        }

    }

    public void testFailsValidationIfNeitherLocalWorkingCopyNorBothCvsrootAndModuleSet() throws Exception {
        final MockOSEnvironment env = new MockOSEnvironment();
        ConcurrentVersionsSystem mockEnvCvs = new ConcurrentVersionsSystem() {
            protected OSEnvironment getOSEnvironment() {
                return env;
            }
        };

        // set only module
        mockEnvCvs.setModule("module");

        assertFailsValidation(mockEnvCvs);

        // set only cvsroot as parameter
        mockEnvCvs.setModule(null);
        mockEnvCvs.setCvsRoot("cvsroot");

        assertFailsValidation(mockEnvCvs);

        // set only CVSROOT as environment variable
        mockEnvCvs.setCvsRoot(null);
        env.add("CVSROOT", "cvsroot");
        assertFailsValidation(mockEnvCvs);
    }

    public void testLocalWorkingCopyAndCvsrootModuleAreMutuallyExclusive() throws Exception {
        cvs.setLocalWorkingCopy("localWorkingCopy");
        cvs.setModule("module");
        cvs.setCvsRoot("cvsroot");

        assertFailsValidation(cvs);
    }

    public void testFailsValidationIfLocalWorkingCopyDoesNotExist() {
        cvs.setLocalWorkingCopy("localWorkingCopy");

        assertFailsValidation(cvs);
    }

    private void assertFailsValidation(ConcurrentVersionsSystem cvs) {
        try {
            cvs.validate();
            fail("Should fail validation");
        } catch (CruiseControlException e) {
            // expected
        }
    }

    private static class MockOSEnvironment extends OSEnvironment {
        private final Map<String, String> myVariables = new HashMap<String, String>();

        public void add(String variable, String value) {
            myVariables.put(variable, value);
        }

        public String getVariable(String variable) {
            return myVariables.get(variable);
        }
    }

}