Tommy D. Rossi
44 lines
1.6 KiB
TypeScript
44 lines
1.6 KiB
TypeScript
/**
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* Vitest setup - handles Playwright CDP disconnect race condition.
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*
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* ROOT CAUSE (from Playwright source crConnection.ts:164):
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*
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* _onMessage(object: ProtocolResponse) {
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* if (object.id && this._callbacks.has(object.id)) {
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* // Handle response with matching callback
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* } else if (object.id && object.error?.code === -32001) {
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* // Closed session error - ignore
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* } else {
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* assert(!object.id); // ← FAILS: expects event, got orphaned response
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* }
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* }
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*
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* WHY IT HAPPENS:
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* 1. Relay sends CDP response to Playwright
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* 2. Playwright's messageWrap() schedules _onMessage for next task
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* 3. browser.close() is called
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* 4. _onClose() fires IMMEDIATELY and clears callbacks via dispose()
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* 5. Scheduled _onMessage finally runs
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* 6. Looks for callback → NOT FOUND → assertion fails
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*
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* This is a race condition in Playwright's async message handling that we cannot
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* fix without patching Playwright. The assertion error during disconnect is benign
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* and expected - it just means a CDP response arrived after we stopped caring.
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*
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* See: https://github.com/microsoft/playwright/blob/main/packages/playwright-core/src/server/chromium/crConnection.ts
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*/
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process.on('unhandledRejection', (reason: any) => {
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// Check if this is Playwright's CDP disconnect assertion error
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if (reason?.message === 'Assertion error') {
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const stack = reason?.stack || ''
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if (stack.includes('crConnection.js') || stack.includes('crSession')) {
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// Benign race condition during disconnect - suppress
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return
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}
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}
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// Re-throw other unhandled rejections to fail the test
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throw reason
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})
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