[2026-09-03] eagle: work/projects/CPM Breakage Testing Steps.md
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### Testing Steps
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Run each case with fresh app data so daily pixel deduplication does not hide results. In Xcode’s console, filter by `PixelKit`.
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#### Healthy navigation
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1. Open `http://privacy-test-pages.site/features/autoconsent/`.
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2. Wait at least 5 seconds → no `debug_web_extension_cpm_*` pixel is sent.
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#### Failure, stuck, and recovery
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1. Open **Debug → Web Extensions → Simulate CPM Messaging Breakage (On)**.
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2. Load the Autoconsent test page and wait 5 seconds → `debug_web_extension_cpm_initialization_failed_after_other` is sent; no `stuck` pixel is sent.
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3. Navigate to another HTTP(S) page and wait 5 seconds → `debug_web_extension_cpm_messaging_stuck_other` is sent.
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4. Select **Simulate CPM Messaging Breakage (Off)**.
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5. Reload the page → `debug_web_extension_cpm_messaging_recovered_without_extension_reload` is sent.
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6. Navigate again → no additional CPM failure or recovery pixel is sent.
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#### Concurrent navigations
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1. Select **Simulate CPM Messaging Breakage (On)**.
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2. Load HTTP(S) pages in two tabs before either 4-second timeout expires.
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3. Wait 5 seconds → initialization failures are observed, but no `debug_web_extension_cpm_messaging_stuck_*` pixel is sent.
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4. Start another navigation after those failures and wait 5 seconds → `debug_web_extension_cpm_messaging_stuck_other` is sent.
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#### Extension reload
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1. Start with **Simulate CPM Messaging Breakage (Off)** and use the Fire button to trigger extension reloading.
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2. After data clearing completes, select **Simulate CPM Messaging Breakage (On)**.
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3. Load the Autoconsent test page and wait 5 seconds → these pixels are sent:
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- `debug_web_extension_cpm_initialization_failed_after_extension_reload`
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- `debug_web_extension_cpm_messaging_extension_reload_failed`
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4. Navigate again and wait 5 seconds → `debug_web_extension_cpm_messaging_stuck_extension_reload` is sent.
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5. Select **Simulate CPM Messaging Breakage (Off)** and reload → `debug_web_extension_cpm_messaging_recovered_after_extension_reload` is sent.
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Session-restoration and tab-crash attribution are covered by unit tests because the in-memory Debug-menu toggle does not survive app restart and does not itself crash a tab.
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