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fix(jest-binary-data-matchers): this.expand may be an undefined value #585

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merged 1 commit into from
Jan 1, 2023
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fix(jest-binary-data-matchers): this.expand may be an undefined value #585

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8 changes: 7 additions & 1 deletion packages/jest-matchers/binary-data/src/matchers.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,12 @@ import { BytesData, bytesEqual, byteSize, isBytesData, padTextColumns, toMessage
import { ensureBytes, ensureByteSizeOrBytes, printBytesDiff } from './utils/jest';
import type { MatcherHintOptions } from './utils/jest';

/**
* The optional property of matcher context is true if undefined.
* @see https://github.com/facebook/jest/blob/v27.0.6/packages/expect/src/matchers.ts#L57-L58
*/
const isExpand = (expand: boolean | undefined): boolean => expand !== false;

function createCompareByteSizeMatcher(
opts: {
matcherName: string;
Expand Down Expand Up @@ -111,7 +117,7 @@ export function toBytesEqual(
printBytesDiff(this.utils, expected, received, {
expectedLabel: 'Expected',
receivedLabel: 'Received',
expand: this.expand,
expand: isExpand(this.expand),
pass,
}),
]);
Expand Down