Function done

src/test/run.js:159–166

(error)

    var step = currentStep;
    var doneCalled = false;
    var done = function(error) {
        if (doneCalled) return;
        if (error) step.error = error;
        step.passed = !step.error;
        step.time = Date.now() - t;
        doneCalled = true;
        resume();
    };
    var t = Date.now();

    step.passed = false;