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docs/AI Gen Docs/test-storage-persistence.md

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+---
+type: Task
+status: AI Gen TODO
+category: QA
+isAgentGenerated: "true"
+---
+
+# Test: Storage Persistence Across Page Reloads
+
+## Description
+
+Verify that the Build Calculator correctly persists and restores user settings (selected faction, immortal, build input delays, attack/travel times) across page reloads using `localStorage`.
+
+## Rationale
+
+The app relies on `Blazored.LocalStorage` via `IStorageService` to persist settings. No existing test covers the round-trip: set a value, reload the page, and assert the value survived. This is a common source of regressions when storage keys, serialization, or service initialization changes.
+
+## Playwright Feature
+
+This test uses **`page.evaluate()`** to directly inspect `localStorage` and **`page.goto()` with a fresh navigation** to verify persistence across a full Blazor WASM lifecycle (including hydration and service re-initialization).
+
+Unlike existing tests that set values and immediately assert in-memory Blazor state, this test:
+
+1. Sets a filter value via the UI (select option).
+2. Reads the raw `localStorage` key to confirm Blazor wrote it.
+3. Reloads the page (`page.reload()` or a fresh `page.goto`).
+4. Asserts the UI reflects the restored value **without** user re-selection.
+
+### Example Assertions
+
+- `localStorage.getItem('SelectedFaction')` equals `DataType.FACTION_QRath` GUID after selecting Q'Rath.
+- After reload, the faction `<select>` element shows Q'Rath selected without any `selectOption` call.
+- After reload, the hotkey viewer shows Q→Acropolis (proving the filter was restored end-to-end).