Question

我有一个简单的场景，我想测试我是否能够删除一些对象。所以场景如下：

1通过休息添加一些独特的对象（不使用浏览器，我不想在每个/所有之前使用，因为它仅适用于此测试）

2删除Web应用程序中的上述对象

所以我写了我的代码模拟：

it('test promise', function(done) {
    console.log('start');
    d = protractor.promise.defer();
    setTimeout(function() {
        console.log("rest call");
        d.fulfill('ok');
        done();
    }, 3000);
    console.log('before expect');
    expect(d).toBe('ok'); //code should be stoped here till rest above finish
    console.log('after expect');
    console.log('rest test based on deffer result');
    console.log('change tab... find elements... click to delete...');
});

此代码的输出是：

start
before expect
after expect
change tab... find elements... click to delete...
rest call

因此，您可以看到在我将执行所有webdriver操作后运行休息呼叫... 一些想法？

编辑：

我添加了控制流，但它仍然不起作用。代码：

it('test promise', function(done) {
    console.log('start');
    flow = protractor.promise.controlFlow();
    var d = protractor.promise.defer();
    var restCall = function _makeRestCall() {
        setTimeout(function () {
            console.log("rest call");
            d.fulfill('ok');
        }, 3000);
        return d.promise
    };
    console.log('before expect');
    flow.execute(restCall);
    // expect(d).toBe('ok'); //version 1 not work
    expect(restCall).toBe('ok'); //version 2 not work
    console.log('after expect');
    console.log('rest test based on deffer result');
});

输出：

start
before expect
after expect
rest test based on deffer result
rest call

Answer 1

你创造承诺的方式绝对正确

唯一需要的更改是将其添加到Protractor Control Flow。它需要添加两个步骤，并且几乎不需要重构代码

步骤1：启动量角器控制流程，然后使用flow.execute()插入任何async function which returns promise into Control Flow

describe('sample test', function(){
    flow = protractor.promise.controlFlow();

var restCall = function _makeRestCall() {
                var d = protractor.promise.defer();
                setTimeout(function () {
                    console.log("rest call");
                    d.fulfill('ok');
                }, 3000);
                return d.promise
            }
            flow.execute(restCall)

这会将您的异步调用放入控制流中，只有在解析了承诺后，浏览器命令才会执行

更新：添加了测试用例的完整流程

describe('sample test', function(){
    it('test promise', function() {
        browser.get('')
        console.log('start');
        flow = protractor.promise.controlFlow();
        var d = protractor.promise.defer();
        var restCall = function _makeRestCall() {
            setTimeout(function () {
                console.log("rest call");
                d.fulfill('ok');
            }, 3000);
            return d.promise
        };
        console.log('before expect');

        // Can directly add expect here as flow.execute() returns promise 
        expect(flow.execute(restCall)).toBe('ok');

        // All subsequent browser command part of Protractor Control Flow will be executed only after the promise of restCall is resolved

        browser.getCurrentUrl().then(function(value) {
            console.log('after expect');
            console.log('rest test based on deffer result');
        });

    });
});

量角器等待休息呼叫结束

1 个答案: