Does the built-in waiting mechanism in Protractor automatically handle promises?

While browsing through Stack Overflow, I stumbled upon this response in a discussion about Protractor tests and asynchronous solutions:

'AFAIK expect waits internally for the related promises.'

I have tried looking through the official Protractor documentation to confirm this information, but haven't had much success. Can anyone guide me to the specific section in the documentation where this is mentioned?

If this statement holds true, it could greatly simplify my workload! With over two hundred tests on hand, I am currently modifying such calls as:

expect(parentDialog.getAttribute('class')).toContain('k-window-maximized');

To follow this pattern instead:

parentDialog.getAttribute('class').then(function(cls) { 
   expect(cls).toContain('k-window-maximized');
});
javascriptseleniumpromiseprotractor

Answer №1

It is without a doubt true. The function expect() is modified by jasminewd/jasminewd2 (utilized internally by protractor) to automatically resolve promises. As stated in the README:

Enhances expect so that it automatically unwraps promises before performing the assertion.

Additional documentation reference can be found here:

In simple terms, if you do not need an actual resolved value for future actions or calculations, you can confidently pass a promise into expect():

expect(parentDialog.getAttribute('class')).toContain('k-window-maximized');

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