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Mock the window.setTimeout in a Jasmine test to avoid waiting

, 21 Aug 2014 CPOL 2.1K
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Originally posted on: http://geekswithblogs.net/Aligned/archive/2014/08/21/mock-the-window.settimeout-in-a-jasmine-test-to-avoid-waiting.aspxJasmine has a clock mocking feature, but I was unable to make it work in a function that I’m calling and want to test. The example only shows using clock for a

Originally posted on: http://geekswithblogs.net/Aligned/archive/2014/08/21/mock-the-window.settimeout-in-a-jasmine-test-to-avoid-waiting.aspx

Jasmine has a clock mocking feature, but I was unable to make it work in a function that I’m calling and want to test. The example only shows using clock for a setTimeout in the spec tests and I couldn’t find a good example. Here is my current and slightly limited approach.

 

If we have a method we want to test:

<span class="kwrd" style="color: #0000ff">var</span>
};

Here’s my testing code:

<span class="kwrd" style="color: #0000ff">var</span>

I got a good pointer from Andreas in this StackOverflow question.

This would also work for window.setInterval.

Other possible approaches:

  • create a wrapper module of setTimeout and setInterval methods that can be mocked. This can be mocked with RequireJS or passed into the constructor.
  • pass the window.setTimeout function into the method (this could get messy)

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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