35 lines
882 B
TypeScript
35 lines
882 B
TypeScript
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/**
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* The inbuilt toEqual() matcher will always return TRUE when provided with 2 ArrayBuffers.
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* This is because an ArrayBuffer must be wrapped in a new Uint8Array to be accessible.
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* This custom matcher will automatically instantiate a new Uint8Array on the recieved value
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* (and optionally, the expected value) and then call toEqual() on the resulting Uint8Arrays.
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*/
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export const toEqualBuffer: jest.CustomMatcher = function (
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received: ArrayBuffer,
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expected: Uint8Array | ArrayBuffer
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) {
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received = new Uint8Array(received);
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if (expected instanceof ArrayBuffer) {
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expected = new Uint8Array(expected);
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}
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if (this.equals(received, expected)) {
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return {
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message: () => `expected
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${received}
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not to match
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${expected}`,
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pass: true,
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};
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}
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return {
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message: () => `expected
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${received}
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to match
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${expected}`,
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pass: false,
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};
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};
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