expect: Improve report when mock-spy matcher fails, part 3 #8697
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Summary
Throw matcher error if
n
is not a positive safe integer:toHaveBeenNthCalledWith
andnthCalledWith
toHaveNthReturnedWith
andnthReturnedWith
Because baseline code returns
pass: false
a negative assertion with invalidn
cannot fail :(Do y’all think to throw error instead of false negative (pardon pun) as:
For consistency with other matcher errors, display
received
instead ofjest.fn()
or mock namematcherName.slice(1)
is temporary until future pull requests which will delete period from names in calls to create matcher functions.Test plan
Example pictures baseline at left and improved at right
Examples of positive assertions:
Examples of negative assertions: