在为Angular Scenario Runner编写E2E测试时,我遇到了一个query()方法：
element(selector,label).query(fn)
Executes the function fn(selectedElements,done),where selectedElements are the elements that match the given jQuery selector and done is a function that is called at the end of the fn function. The label is used for test output.
所以我在html页面上为一组按钮写了一个it-case：
it('should display all buttons on page load',function () {
var buttonText = ['1','2','3','4','5','6','7','8','9','0'];
element('button','UI elements').query(function (selectedElements,done) {
selectedElements.each(function (idx,elm) {
expect(elm.innerText in buttonText).toEqual(true);
});
done();
});
});
作为测试执行的结果,我收到了10个带有文本的失败expect-clauses的列表：
expected true but was undefined
中间调试显示buttonText条件下的elm.innerText是真实的.
所以我的问题是,出了什么问题？是不正确的使用done()方法？
解决方法
你不能在element().query()函数中调用expect().
但是你可以做到以下几点
var promise = element('SELECTOR').query(function(selectedElements,done) {
// We are in JQuery land.
if (selectedElements < 1) {
done('ERROR MESSAGE')
} else {
done(null,selectedElements[0].innerText)
}
// For documentation only.
// Don't return anything... just continue.
done()
})
expect(promise).toEqual('i am waiting for you')
您可以将承诺和期望结合到一个电话中.
