A Jasmine instruction to ease setting up asynchronous pre-conditions before, during and after tests
Since Jasmine 2.0, the
waitsFor methods have been removed in favor of allowing functions run as part of the spec to receive and invoke a
done callback. This new approach is described at Upgrading Jasmine - Asynchronous Specs.
done callback works great for asynchronous features with a callback (such as AJAX, jQuery animations or anything else with promises). However, there are yet other asynchronous features that will complete on their own and would be using
waitsFor before Jasmine 2.0, like rendering Google Maps, images or anything else that can change both the DOM and the CSSOM.
While it is utterly possible to re-implement
waitsFor I believe that Jasmine 2.0 direction is more towards stepping away from this idea and instead taking more advantage of
done callbacks, like putting one
it block as a pre-condition for another.
preCondition instruction defined here will simply poll a given conditional function at a certain time interval, and once its condition is met the callback
done will be fired off.
npm install jasmine-precondition
preCondition(condition, done, interval);
condition: a conditional function that shall only return
truewhen the condition you are expecting for is met.
afterEachmust be passed here.
interval(optional): a time interval in milliseconds between two
conditionexecutions. Default is 100.