Sometimes, we want to modify Jasmine spies based on arguments with JavaScript.
In this article, we’ll look at how to modify Jasmine spies based on arguments with JavaScript.
How to modify Jasmine spies based on arguments with JavaScript?
To modify Jasmine spies based on arguments with JavaScript, we can use the withArgs method.
For instance, we write
describe("user test", () => {
it("gets user name and ID", () => {
spyOn(externalApi, "get")
.withArgs("abc")
.and.returnValue("Jane")
.withArgs("123")
.and.returnValue(98765);
});
});
to call withArgs with the arguments that we want to call externalApi.get with.
And then we call returnValue to mock the returned value given the argument we called withArgs with.
And we call withArgs and returnValue a 2nd time to call externalApi.get with the 2nd argument and mock its returned value given the argument.
Conclusion
To modify Jasmine spies based on arguments with JavaScript, we can use the withArgs method.
