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Custom Asymmetric Matchers #5503

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Merged
cpojer merged 7 commits into from
Mar 8, 2018
Merged

Custom Asymmetric Matchers #5503

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ec54411
test
aymericbouzy Feb 9, 2018
e6e008f
define asymmetric matchers
aymericbouzy Feb 9, 2018
fb98903
Merge master
aymericbouzy Mar 5, 2018
23d316b
more
aymericbouzy Mar 5, 2018
eaf6b04
correction
aymericbouzy Mar 5, 2018
50d1e16
trying to fix flow
aymericbouzy Mar 5, 2018
3ed393f
flow fix
aymericbouzy Mar 5, 2018
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test
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@aymericbouzy
aymericbouzy committed Feb 9, 2018
commit ec544110a871d505f4e4229d4a5868c05f6eacf0
8 changes: 8 additions & 0 deletions packages/expect/src/__tests__/extend.test.js
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Expand Up @@ -70,3 +70,11 @@ it('exposes an equality function to custom matchers', () => {

expect(() => jestExpect().toBeOne()).not.toThrow();
});

it('defines asymmetric matchers', () => {
jestExpect({value: 2}).toEqual({value: expect.toBeDivisibleBy(2)});
jestExpect({value: 3}).toEqual({value: expect.not.toBeDivisibleBy(2)});
expect(() =>
jestExpect({value: 3}).toEqual({value: expect.toBeDivisibleBy(2)}),
).toThrowErrorMatchingSnapshot();
});