/**
  * Tests that {@link phpucConsoleInputDefinition::addArgument()} stores
  * a valid argument. 
  *
  * @return void
  */
 public function testAddArgument()
 {
     $definition = new phpucConsoleInputDefinition();
     $definition->addCommand('manuel', 'Hello World.');
     $this->assertFalse($definition->hasArgument('manuel', 'foo'));
     $definition->addArgument('manuel', 'foo', 'Hello World.');
     $this->assertTrue($definition->hasArgument('manuel', 'foo'));
 }