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998 B
998 B
Suggest using toBeCalledWith()
or toHaveBeenCalledWith()
(prefer-called-with
)
The toBeCalled()
matcher is used to assert that a mock function has been
called one or more times, without checking the arguments passed. The assertion
is stronger when arguments are also validated using the toBeCalledWith()
matcher. When some arguments are difficult to check, using generic match like
expect.anything()
at least enforces number and position of arguments.
This rule warns if the form without argument checking is used, except for .not
enforcing a function has never been called.
Rule details
The following patterns are warnings:
expect(someFunction).toBeCalled();
expect(someFunction).toHaveBeenCalled();
The following patterns are not warnings:
expect(noArgsFunction).toBeCalledWith();
expect(roughArgsFunction).toBeCalledWith(expect.anything(), expect.any(Date));
expect(anyArgsFunction).toBeCalledTimes(1);
expect(uncalledFunction).not.toBeCalled();