fix: use advanced serialization when spawning jest workers

jestjs · Dec 30, 2020 · ff90e08 · ff90e08
1 parent 6e282ca
commit ff90e08
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -41,6 +41,7 @@
 - `[jest-reporter]` Handle empty files when reporting code coverage with V8 ([#10819](https://github.com/facebook/jest/pull/10819))
 - `[jest-resolve]` Replace read-pkg-up with escalade package ([#10781](https://github.com/facebook/jest/pull/10781))
 - `[jest-resolve]` Disable `jest-pnp-resolver` for Yarn 2 ([#10847](https://github.com/facebook/jest/pull/10847))
+- `[jest-runner]` Use advanced serialization when using workers ([#10644](https://github.com/facebook/jest/pull/10644))
 - `[jest-runtime]` [**BREAKING**] Do not inject `global` variable into module wrapper ([#10644](https://github.com/facebook/jest/pull/10644))
 - `[jest-runtime]` [**BREAKING**] remove long-deprecated `jest.addMatchers`, `jest.resetModuleRegistry`, and `jest.runTimersToTime` ([#9853](https://github.com/facebook/jest/pull/9853))
 - `[jest-runtime]` Fix stack overflow and promise deadlock when importing mutual dependant ES module ([#10892](https://github.com/facebook/jest/pull/10892))

diff --git a/packages/jest-runner/src/index.ts b/packages/jest-runner/src/index.ts
@@ -166,7 +166,12 @@ export default class TestRunner {
 
     const worker = new Worker(TEST_WORKER_PATH, {
       exposedMethods: ['worker'],
-      forkOptions: {stdio: 'pipe'},
+      forkOptions: {
+        // default to advanced serialization in order to match worker threads
+        // @ts-expect-error: option does not exist on the node 10 types
+        serialization: 'advanced',
+        stdio: 'pipe',
+      },
       maxRetries: 3,
       numWorkers: this._globalConfig.maxWorkers,
       setupArgs: [