Test Coverage on NgRX store selector Unit test

Bwizard 0
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My test is passing but I am unable to achieve test coverage on a NgRX store select. this.isNIAddress$ is set in ngOnInit.

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I am using Jest and setting the return value of this.isNIAddress$ within the test. If I do not do that then I get an error saying addresses inside the store is empty. How do I mock the getAllValidAddresses selector?

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Error if I add the component.ngOnInit()

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How do I properly test this store observable to obtain code coverage?

unit-testing jestjs typescript angular
1 Answers

As per comments you can have one spy object in your spec:

spyOn(component, 'isPostcodeNI').and.returnValue(true);
component.isPostcodeNI(NiAddress[0].postcode);
expect(component.isPostcodeNI).toHaveBeenCalled();

Now you can expect the spy has been called with the postcode.

userTxr40
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