Protractor browser.wait doesn't wait

Question

I am assuming that browser.wait should be a blocking call, but it is not working as I expected. Here is my sample:

descr         


        

Answer 1

It is all about promises (actually every protractor question is about promises).

browser.wait() is not a blocking call, it schedules a command to wait for a condition:

Schedules a command to wait for a condition to hold, as defined by some user supplied function. If any errors occur while evaluating the wait, they will be allowed to propagate. In the event a condition returns a webdriver.promise.Promise, the polling loop will wait for it to be resolved and use the resolved value for evaluating whether the condition has been satisfied. The resolution time for a promise is factored into whether a wait has timed out.

It would not call the function you are passing in immediately, it would schedule a command and wait for promise to be resolved (if the function inside returns a promise).

You can use then() to have a correct order in this case:

beforeEach(function() {
    browser.wait(function() {
        console.log('1 - BeforeEach WAIT');
        return true;
    }).then(function () {
        console.log('2 - BeforeEach after wait');
    });
});

See the use cases here:

• How can I wait for a condition?

Answer 2

Wait function will hold execution for that particular function, But JavaScript work in async way. So sometime there might be chance your function gets executed before wait function. To understand it better you need to read Promises in angular/protractor.

To get your code working you need to .then(function(){}); (asking function 2 to wait until 1st complete.

browser.wait(function() {
    console.log('1 - BeforeEach WAIT');
    return true;
}).then(function () {
    console.log('2 - BeforeEach after wait');
});