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fix: add require.main when using isolateModules #10621

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Merged
merged 6 commits into from
Oct 11, 2020
Merged

fix: add require.main when using isolateModules #10621

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dd435fc
Add mainModule instance variable
flozender Oct 11, 2020
9db2419
add `main` to unit tests
flozender Oct 11, 2020
fe7a823
update changelog and test
flozender Oct 11, 2020
615b9c4
reset `mainModule` during teardown
flozender Oct 11, 2020
d1b488b
add testPath check
flozender Oct 11, 2020
59068c4
add integration test
flozender Oct 11, 2020
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@

- `[jest-runner, jest-runtime]` fix: `require.main` undefined with `createRequire()` ([#10610](https://github.com/facebook/jest/pull/10610))
- `[jest-runtime]` add missing `module.path` property ([#10615](https://github.com/facebook/jest/pull/10615))
- `[jest-runtime]` fix: add `mainModule` instance variable to runtime ([#10621](https://github.com/facebook/jest/pull/10621))
- `[jest-validate]` Show suggestion only when unrecognized cli param is longer than 1 character ([#10604](https://github.com/facebook/jest/pull/10604))
- `[jest-validate]` Validate `testURL` as CLI option ([#10595](https://github.com/facebook/jest/pull/10595))

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2 changes: 2 additions & 0 deletions packages/jest-runtime/src/__tests__/runtime_require_module.test.js
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Expand Up @@ -45,6 +45,7 @@ describe('Runtime requireModule', () => {
'path',
'parent',
'paths',
'main',
]);
}));

Expand All @@ -63,6 +64,7 @@ describe('Runtime requireModule', () => {
'path',
'parent',
'paths',
'main',
]);
}));

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11 changes: 11 additions & 0 deletions packages/jest-runtime/src/index.ts
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Expand Up @@ -150,6 +150,7 @@ class Runtime {
| null;
private _internalModuleRegistry: ModuleRegistry;
private _isCurrentlyExecutingManualMock: string | null;
private _mainModule: Module | null;
private _mockFactories: Map<string, () => unknown>;
private _mockMetaDataCache: Map<
string,
Expand Down Expand Up @@ -202,6 +203,7 @@ class Runtime {
this._explicitShouldMock = new Map();
this._internalModuleRegistry = new Map();
this._isCurrentlyExecutingManualMock = null;
this._mainModule = null;
this._mockFactories = new Map();
this._mockRegistry = new Map();
// during setup, this cannot be null (and it's fine to explode if it is)
Expand Down Expand Up @@ -1053,6 +1055,15 @@ class Runtime {
}),
];

if (!this._mainModule) {
this._mainModule = module;
}

Object.defineProperty(module, 'main', {
enumerable: true,
value: this._mainModule,
});

try {
compiledFunction.call(
module.exports,
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