CommandLineParameterRequirementsTest

//2012-03-20 johnpfeiffer
import static org.junit.Assert.*;
import org.junit.Test;

public class CommandLineParameterRequirementsTest
{
    CommandLineParameterRequirements tester = null;
    public static final String classVersion = "0.2";

    @Test   public void testCommandLineParameterRequirements()
    {
         try
       {    tester = new CommandLineParameterRequirements( 0 , null );
       }
       catch( NullPointerException npe )
       {    return;
       }
         fail("Expected NullPointerException");

         try
       {    tester = new CommandLineParameterRequirements( -1 , null );
       }
       catch( IllegalArgumentException npe )
       {    return;
       }
         fail("Expected IllegalArgumentException");
    }

    @Test public void testGetVersion()
    {
        tester = new CommandLineParameterRequirements( 1 , "testGetVersion" );
        assertEquals( classVersion , tester.getVersion() );
    }

    //does not impose a maximum limit
    @Test public void testGetRequiredCount()
    {
        int resultCount = -1;

        tester = new CommandLineParameterRequirements( 1 , "error message" );
        assertEquals( 1 , tester.getRequiredCount() );

        try
    {   tester = new CommandLineParameterRequirements( -1 , "error" );
    }
    catch( IllegalArgumentException npe )
    {   return;
    }
      fail("Expected IllegalArgumentException");

    }

    @Test public void testGetErrorMessage()
    {
        String result = null;

        tester = new CommandLineParameterRequirements( 1 , "errormessage" );
        assertEquals( "errormessage" ,  tester.getErrorMessage() );

        try
    {   tester = new CommandLineParameterRequirements( -1 , null );
    }
    catch( IllegalArgumentException npe )
    {   return;
    }
      fail("Expected IllegalArgumentException");

        result = tester.getErrorMessage();
        assertNotNull( result );
    }

    @Test public void testIsValid()
    {
    tester = new CommandLineParameterRequirements( 0 , "error message" );
      assertFalse( tester.isValid( null , System.out ) );

      String testargs[] = new String[ ] { "string" };
      tester = new CommandLineParameterRequirements( 1 , "error message" );
      assertTrue( tester.isValid( testargs , System.out ) );
    }

} //end class