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[16.3] testmode: Fix infinite recursion in testmode passthrough fetch - #97691
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With `experimental.testProxy` on, `@mswjs/interceptors` (switched to socket-level interception in #96059) also catches the passthrough `fetch` that `handleFetch` makes for non-test requests. That request has no `next-test-internal` marker, so the interceptor calls `handleFetch` again, takes the passthrough branch again, and loops until it errors. So any server-side request made outside a test context never resolves during a test run. This adds the `next-test-internal` marker to the passthrough request, and to the `continue` case that has the same problem. It is the guard #96059 already added for the proxy-protocol request, so the request reaches the real server instead of being intercepted again.
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Tests PassedCommit: 96297b8 |
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Stats from current PR🔴 1 regression, 1 improvement
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dianatofficial
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Nice improvement. Clean separation of concerns.
mischnic
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eps1lon
approved these changes
Aug 26, 2026
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Backport #96525