CODEWITHSUNDEEP
javascriptunit-testingjasminespy
wheresrhys
wheresrhys

Reputation: 23530

Spying on immutable native methods

I want to test if window.location.assign is being called, and so am trying to use spyOn(window.location, 'assign');, but the method isn't overwriteable.

Are there any other approaches I can use to spy on native methods that can't be overwritten?

Upvotes: 5

Views: 668

Answers (1)

Kaizo
Kaizo

Reputation: 4185

What you can do is to create a wrapper of the immutable function in your class:

MyClass.prototype.locationAssign = function () {
    window.location.assign.apply(window.location, arguments);
}

and spy on that method.

spyOn(MyClass, 'locationAssign');

Upvotes: 1

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