How can I check if an element is require using Protractor in angular2?

问题

How can I check if an element(input field or drop down list) is require using Protractor in angular 2?

    expect(helpers.hasClass(element(by.id('datasourceName')), 'ng-invalid')).toBe(true);

i'm using helper from below: https://www.npmjs.com/package/protractor-helpers

no idea whether it's correct way or not.

回答1:

locate the input and check with the getAttribute method:

expect(inputElement.getAttribute("required")).toBe("true");

来源：https://stackoverflow.com/questions/41401433/how-can-i-check-if-an-element-is-require-using-protractor-in-angular2