Make the Apps recovery exposure test deterministic - #35196
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## Why The Apps MCP background retry could complete before the test inspected the initial sampling request, making the recovery timing nondeterministic. ## What changed - Add a test-server gate that can hold and explicitly release the next successful Apps MCP initialization. - Use a dedicated MCP mock server so the held initialization does not block model responses or app discovery. - Assert that recovery uses exactly two initialization attempts and that Apps guidance and the deferred namespace appear only after the gate is released. GitOrigin-RevId: deb21d4b41f353c3f84428616769af9faa1a0487
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Make the Apps recovery exposure test deterministic
Why
The Apps MCP background retry could complete before the test inspected the
initial sampling request, making the recovery timing nondeterministic.
What changed
successful Apps MCP initialization.
model responses or app discovery.
guidance and the deferred namespace appear only after the gate is released.