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Fix Jest 28+ expect.extend is not a function error #3559

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Merged
piaskowyk merged 2 commits into from
Nov 3, 2022
Merged

Fix Jest 28+ expect.extend is not a function error #3559

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1145262
Fix Jest 28+ `expect.extend is not a function` error
yusufyildirim Sep 10, 2022
d6c60ff
If undefined try to get default (jest 28)
piaskowyk Nov 2, 2022
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20 changes: 14 additions & 6 deletions src/reanimated2/jestUtils.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -188,13 +188,21 @@ export const advanceAnimationByFrame = (count) => {
};

export const setUpTests = (userConfig = {}) => {
let expect;
try {
expect = require('expect');
} catch (_) {
// for Jest in version 28+
const { expect: expectModule } = require('@jest/globals');
let expect = global.expect;
if (expect === undefined) {
const expectModule = require('expect');
expect = expectModule;
// Starting from Jest 28, "expect" package uses named exports instead of default export.
// So, requiring "expect" package doesn't give direct access to "expect" function anymore.
// It gives access to the module object instead.
// We use this info to detect if the project uses Jest 28 or higher.
if (typeof expect === 'object') {
const jestGlobals = require('@jest/globals');
expect = jestGlobals.expect;
}
if (expect === undefined || expect.extend === undefined) {
expect = expectModule.default;
}
}

require('setimmediate');
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