21 lines
665 B
TypeScript
21 lines
665 B
TypeScript
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/**
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* Matches the expected date within an optional ms precision
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* @param received The received date
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* @param expected The expected date
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* @param msPrecision The optional precision in milliseconds
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*/
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export const toAlmostEqual: jest.CustomMatcher = function (
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received: Date,
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expected: Date,
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msPrecision: number = 10,
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) {
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const receivedTime = received.getTime();
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const expectedTime = expected.getTime();
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const difference = Math.abs(receivedTime - expectedTime);
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return {
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pass: difference <= msPrecision,
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message: () =>
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`expected ${received} to be within ${msPrecision}ms of ${expected} (actual difference: ${difference}ms)`,
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};
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};
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