public ExecOutput execWithFailure(XcodeAction action) {
        withArgument(action.toString());
        return findXcodeBuild().execWithFailure(args, buildEnvironment(testDirectory));
    }

    public ExecutionFailure fails(XcodeAction action) {
        withArgument(action.toString());
        ExecOutput result = findXcodeBuild().execWithFailure(args, buildEnvironment(testDirectory));