Javascript 量角器-can'；t读取EC.texttobepresentElement的未定义属性绑定

我的规格：

  it('displays user details page of an active user', function () {
        var userDetailsPage = new UserDetailsPage();
        var usersPage = new UsersPage();
        expectVisibilityOf(usersPage.thirdRow, 'element firstRow was not visible ');
        var positionUsersTableThirdRow = usersPage.thirdRowPosition.getText();
        var idUsersTableThirdRow = usersPage.thirdRowId.getText();
        var emailUsersTableThirdRow = usersPage.thirdRowEmail.getText();
        clickWithWait(usersPage.thirdRow);
        browser.wait(EC.elementToBeClickable(userDetailsPage.position.value), WAIT_TIMEOUT, 'element position was not clickable ');
        browser.wait(EC.elementToBeClickable(userDetailsPage.id), WAIT_TIMEOUT, 'element id was not clickable ');
        browser.wait(EC.elementToBeClickable(userDetailsPage.email), WAIT_TIMEOUT, 'element email was not clickable ');

        browser.wait(EC.textToBePresentInElement(userDetailsPage.position, positionUsersTableThirdRow), 5000);
        browser.wait(EC.textToBePresentInElement(userDetailsPage.id, idUsersTableThirdRow), 5000);
        browser.wait(EC.textToBePresentInElement(userDetailsPage.email, emailUsersTableThirdRow), 5000);

        //expect(userDetailsPage.position.value.getText()).toEqual(positionUsersTableThirdRow);
        //expect(userDetailsPage.id.getText()).toEqual(idUsersTableThirdRow);
        //expect(userDetailsPage.email.getText()).toEqual(emailUsersTableThirdRow);
    });

问题是，当我使用

expect（element.getText（））.toEqual（）时，测试工作正常（这些注释项）但对于量角器ExpectedCondition，它会失败，并显示有关未定义绑定的消息-
失败：无法读取未定义的属性“bind”。
这里有什么问题？
我认为这是一个简单的复制粘贴错误。您需要使用
userDetailsPage.position.value
而不是
userDetailsPage.position
：

positionUsersTableThirdRow.then(function (value) {
    browser.wait(EC.textToBePresentInElement(userDetailsPage.position.value, value), 5000);
});

请注意，这里我使用
then（）
True显式解析
positionUsersTableThirdRow
，它解决了绑定异常，但这次出现了TimeoutError。就像它在等待一些不存在的东西。@Michal我不确定，但你不应该用
then（）
？…如何明确地解析
positionUsersTableThirdRow
？你能更正我的密码吗？我是js的新手。@Michal顺便说一句，有一个更新-你能检查一下它是否适合你吗？谢谢