@Test( expected = MojoFailureException.class )
public void testEmptyTargetProject() throws Exception {

	ValidateTargetMojo mojo = (ValidateTargetMojo) super.findMojo( "target-ok-single", "validate-target" );
	MavenProject project = (MavenProject) this.rule.getVariableValueFromObject( mojo, "project" );
	Assert.assertNotNull( project );
	// Do NOT copy the resources
	Utils.createDirectory( new File( project.getBuild().getOutputDirectory()));
	// Execute
	mojo.execute();
}