why the main method are not covered? urgent, please help me
- by Mike.Huang
main method:
 public static void main(String[] args) throws Exception
{
    if (args.length != EXPECTED_NUMBER_OF_ARGUMENTS)
    {
        System.err.println("Usage - java XFRCompiler ConfigXML PackageXML XFR");
    }
    String configXML = args[0];
    String packageXML = args[1];
    String xfr = args[2];
    AutoConfigCompiler compiler = new AutoConfigCompiler();
    compiler.setConfigDocument(loadDocument(configXML));
    compiler.setPackageInfoDoc(loadDocument(packageXML));
    // compiler.setVisiblityDoc(loadDocument("VisibilityFilter.xml"));
    compiler.compileModel(xfr);     
}
private static Document loadDocument(String fileName) throws Exception
{
    TXDOMParser parser = (TXDOMParser) ParserFactory.makeParser(TXDOMParser.class.getName());
    InputSource source = new InputSource(new FileInputStream(fileName));
    parser.parse(source);
    return parser.getDocument();  
}
testcase:
@Test
public void testCompileModel() throws Exception
 {
  // construct parameters
  URL configFile = Thread.currentThread().getContextClassLoader().getResource("Ford_2008_Mustang_Config.xml");
  URL packageFile = Thread.currentThread().getContextClassLoader().getResource("Ford_2008_Mustang_Package.xml");
  File tmpFile = new File("Ford_2008_Mustang_tmp.xfr");
  if(!tmpFile.exists()) {
   tmpFile.createNewFile();
  }
String[] args = new String[]{configFile.getPath(),packageFile.getPath(),tmpFile.getPath()};
try {
   // test main method
   XFRCompiler.main(args);
  } catch (Exception e) {
   assertTrue(true);
  }
  try {
   // test args length is less than 3
   XFRCompiler.main(new String[]{"",""});
  } catch (Exception e) {
   assertTrue(true);
  }
  tmpFile.delete();
 }
coverage outputs displayed as the lines from “String configXML = args[0];" in main method 
are not covered