Calling Through
Explore how to use Jasmine's callThrough and callFake methods to control spy behavior when testing Angular applications. Understand forwarding method calls to real implementations and creating custom fake methods to intercept and test function calls effectively.
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We'll cover the following...
A Jasmine object spy sits in front of the real object. When our test code calls a method on the underlying object, Jasmine will intercept that call and can take a number of actions. By default, Jasmine uses the stub strategy, which means it returns undefined and does not execute the underlying method.
Default stub strategy
We can also make use of the callThrough and callFake methods:
callThroughis used to forward a method call to the underlying object. The spy will record the method calls so we can make expectations in our test.
The callThrough strategy
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