javascript - AngularJS Protractor 测试: function should return a promise

Question

我有一个函数可以将一些值输入到表单中。这应该返回一个 promise ，因此我的测试会等到函数完成并将值输入到表单中。如何在 Protractor 测试中做到这一点？

function enterSomeValuesIntoForm() {
    // do some stuff
    element(by.id('value1')).sendKeys('hello');
    element(by.id('value2')).sendKeys('is it me you looking for?');
    element(by.id('submitButton')).click();
});

Answer 1

据我了解，您实际上不需要从此函数返回 promise 。函数调用期间执行的所有操作都将由 Control Flow 控制和排队。 :

WebDriverJS (and thus, Protractor) APIs are entirely asynchronous. All functions return promises.

WebDriverJS maintains a queue of pending promises, called the control flow, to keep execution organized.

您仍然可以返回由 click() 返回的 promise :

function enterSomeValuesIntoForm() {
    // do some stuff
    element(by.id('value1')).sendKeys('hello');
    element(by.id('value2')).sendKeys('is it me you looking for?');
    return element(by.id('submitButton')).click();
});

以便您稍后可以明确解析:

enterSomeValuesIntoForm().then(function () {
    // form is submitted at this point
});