Releases · thymikee/jest-preset-angular

support Jest 27 (#926) (1c761f8)
config: load zone ESM when running jest in ESM mode (#892) (e03ec19), closes #751
add exports field to package.json, see https://nodejs.org/api/packages.html#packages_package_entry_points
presets: add type definition for presets entry point (#801) (e4ff0c0)
compiler: support ESM (#721) (a2166f8)
presets: add ESM preset (#723) (b0073b0)
compiler: use replace-resources AST transformer from Angular (#708) (1b20c19)
compiler: use downlevel-ctor AST transformer from Angular (#730) (1f964c3)

compiler: reuse cacheFS from jest to reduce file system reading (#679) (f5d9d4b)
config: set skipLibCheck: true if not defined in tsconfig (#678) (0df3ce1)

BREAKING CHANGES

Drop support for Angular < 8.0, see https://angular.io/guide/releases#support-policy-and-schedule.
Drop support for Node.js version 10 since it becomes EOL on 2021-04-30. Required Node version now is >=12.13.0.
Require Jest 27.
Users who are using import 'jest-preset-angular' should change to import 'jest-preset-angular/setup-jest'
transformers: The AST transformers InlineFilesTransformer and StripStylesTransformer are REMOVED and
default jest-preset-angular uses AST transformers from @angular/compiler-cli and @ngtools/webpack.
One should remove the old transformers from the jest config.
compiler: jest-preset-angular now switches to default to use its own transformer which wraps around ts-jest to transform codes.

Users who are currently doing in jest config

// jest.config.js
module.exports = {
    // [...]
    transform: {
      '^.+\\.(ts|js|html)$': 'ts-jest',
    },
}

should change to

// jest.config.js
module.exports = {
    // [...]
    transform: {
      '^.+\\.(ts|js|html)$': 'jest-preset-angular',
    },
}

serializers:: snapshot serializer paths have been changed:
- 'jest-preset-angular/build/AngularNoNgAttributesSnapshotSerializer.js' is changed to 'jest-preset-angular/build/serializers/no-ng-attributes.
- 'jest-preset-angular/build/AngularSnapshotSerializer.js' is changed to 'jest-preset-angular/build/serializers/ng-snapshot.
- 'jest-preset-angular/build/HTMLCommentSerializer.js' is changed to 'jest-preset-angular/build/serializers/html-comment.
When generating a new project from Angular CLI, by default the tsconfig.json doesn't contain any path mappings
hence removing moduleNameMapper from preset will make sure that the preset works in pair with tsconfig.json.
Ones who are relying on the value of moduleNameMapper from the preset should create their own moduleNameMapper
config manually or via ts-jest util https://kulshekhar.github.io/ts-jest/docs/getting-started/paths-mapping
By default, if skipLibCheck is not defined in tsconfig, jest-preset-angular will set it to true. If one wants to have it as false, one can set explicitly in tsconfig.
compiler: jest-preset-angular now switches to default to use its own transformer which wraps around ts-jest to transform codes.

Users who are currently doing in jest config

// jest.config.js
module.exports = {
    // [...]
    transform: {
      '^.+\\.(ts|js|html)$': 'ts-jest',
    },
}

should change to

// jest.config.js
module.exports = {
    // [...]
    transform: {
      '^.+\\.(ts|js|html)$': 'jest-preset-angular',
    },
}