Interface SpyAnd<Fn>

By chaining the spy with and.callFake, all calls to the spy will delegate to the supplied function.

By chaining the spy with and.callThrough, the spy will still track all calls to it but in addition it will delegate to the actual implementation.

Tell the spy to return a promise rejecting with the specified value when invoked.

Tell the spy to return a promise resolving to the specified value when invoked.

By chaining the spy with and.returnValue, all calls to the function will return a specific value.

By chaining the spy with and.returnValues, all calls to the function will return specific values in order until it reaches the end of the return values list.

When a calling strategy is used for a spy, the original stubbing behavior can be returned at any time with and.stub.

By chaining the spy with and.throwError, all calls to the spy will throw the specified value.