Created
August 1, 2017 21:04
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Jest - test same objects and use expect.extend for logging detailed error message.
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const firstArray = [{}, {}, {}]; | |
const secondArray = [firstArray[0], {}, firstArray[2]]; | |
test('Objects should be the same', () => { | |
expect.extend({ | |
toBeSameObject(received, errMsg) { | |
const result = { | |
pass: received, | |
message: () => errMsg | |
}; | |
return result; | |
} | |
}); | |
firstArray.forEach((e, i) => { | |
const errMsg = ` | |
Objects are different. | |
First value: ${JSON.stringify(e)} | |
Second value: ${JSON.stringify(secondArray[i])} | |
Index: ${i} | |
`; | |
expect(e === secondArray[i]).toBeSameObject(errMsg); | |
}); | |
}); |
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