javascript - Jasmine + TypeScript, can`t find the withArgs () method of the Spy class - Stack Overflow

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According to the Jasmine documentation, the Spy object has a method withArgs ()

spyOn (someObj, 'func'). withArgs (1, 2, 3) .and.returnValue (42);

I can`t find this method in the version adapted for TypeScript. My project was created with angular-cli(ng new), Jasmine was provided from the box. When I try to call the withArgs() method, Visual Code writes to me that this method does not exist in the Spy class...

According to the Jasmine documentation, the Spy object has a method withArgs ()

spyOn (someObj, 'func'). withArgs (1, 2, 3) .and.returnValue (42);

I can`t find this method in the version adapted for TypeScript. My project was created with angular-cli(ng new), Jasmine was provided from the box. When I try to call the withArgs() method, Visual Code writes to me that this method does not exist in the Spy class...

• javascript
• angular
• typescript
• jasmine

Share Improve this question Follow asked May 11, 2018 at 10:26 Evgeniy MiroshnichenkoEvgeniy Miroshnichenko 1,86322 gold badges2020 silver badges3232 bronze badges 1

• 1 The @types/jasmine node package seems to be out of date with the current latest version of Jasmine, 3.1. I've opened an issue on the GitHub repo so it can be addressed. – Jacob Stamm Commented Aug 7, 2018 at 17:33

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2 Answers 2

Sorted by: Reset to default 5

It's likely that you are either using an old version of jasmine, or an old version of the jasmine typings library. This particular method was introduced in Jasmine 3.0. Notice that in the Jasmine 2.9 docs, the method does not exist.

All you need to do is update your Jasmine and jasmine typings libraries. Assuming you are using npm, you can do something like this:

npm i -D jasmine@latest jasmine-core@latest @types/jasmine@latest

This updates all jasmine related libraries to their latest version and saves it as devDependencies.

In my case, updating the Jasmine library was no option within the delivery time span due to pany policies. Hence I could not use withArgs. I solved it by using callFake and manually check the argument there.Like this:

mockAuthenticationService = jasmine.createSpyObj<AuthenticationService>('authenticationService', ['hasPermission']);
mockAuthenticationService.hasPermission.and.callFake((permission) => {
  return (permission === 'MyPermission');
});

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