So I am writing unit test using "react-testing-library" on Jest and I have this error:
Test suite failed to run
ReferenceError: global is not defined
at Object.<anonymous> (node_modules/@jest/core/node_modules/graceful-fs/graceful-fs.js:92:1)
at Object.<anonymous> (node_modules/@jest/core/node_modules/expect/build/toThrowMatchers.js:10:24)
at Object.<anonymous> (node_modules/@jest/core/node_modules/expect/build/index.js:35:48)
at TestScheduler.scheduleTests (node_modules/@jest/core/build/TestScheduler.js:333:13)
at runJest (node_modules/@jest/core/build/runJest.js:387:19)
at _run10000 (node_modules/@jest/core/build/cli/index.js:408:7)
at runCLI (node_modules/@jest/core/build/cli/index.js:261:3)
After I added "jest-environment-jsdom": "^27.0.6" as a dev dependency, that error went away.
I have this problem using angular v13 with jest v27.2.3 and tsjest v27.0.5 and my problem was with the configuration of jest.config.ts files
module.exports = {
displayName: 'myApp',
preset: '../../jest.preset.js',
setupFilesAfterEnv: ['<rootDir>/src/test-setup.ts'],
globals: {
'ts-jest': {
tsconfig: '<rootDir>/tsconfig.spec.json',
stringifyContentPathRegex: '\\.(html|svg)$'
}
},
coverageDirectory: '../../coverage/apps/myapp',
transform: {
'^.+\\.(ts|mjs|js|html)$': 'jest-preset-angular'
},
transformIgnorePatterns: [
'<rootDir>/node_modules/(?!lodash-es/.*)',
'<rootDir>/node_modules/(?!ng2-charts/.*)',
'^.+\\.js$'
],
moduleNameMapper: {
'^lodash-es$': 'lodash'
},
snapshotSerializers: [
'jest-preset-angular/build/serializers/no-ng-attributes',
'jest-preset-angular/build/serializers/ng-snapshot',
'jest-preset-angular/build/serializers/html-comment'
]
};
or to libs
module.exports = {
displayName: 'myLib',
preset: '../../../jest.preset.js',
setupFilesAfterEnv: ['<rootDir>/src/test-setup.ts'],
globals: {
'ts-jest': {
tsconfig: '<rootDir>/tsconfig.spec.json',
stringifyContentPathRegex: '\\.(html|svg)$'
}
},
coverageDirectory: '../../../coverage/libs/...',
transform: {
'^.+\\.(ts|mjs|js|html)$': 'jest-preset-angular'
},
transformIgnorePatterns: ['node_modules/(?!.*\\.mjs$)'],
snapshotSerializers: [
'jest-preset-angular/build/serializers/no-ng-attributes',
'jest-preset-angular/build/serializers/ng-snapshot',
'jest-preset-angular/build/serializers/html-comment'
]
};