test(phase22): add client utility behaviour coverage

memory-bank/change-log.md

@@ -2230,3 +2230,39 @@ Validation:
 Follow-ups:
 
 - Optional next bounded slice: add additional phase22 suites (e.g., shared-client utility behaviour tests) under this aggregate runner as migration coverage expands.
+
+---
+
+### CL-064: TASK22260 next slice — phase22 client utility behaviour coverage expansion
+
+date: 2026-03-25
+author: Cline
+scope: `tests/phase22/{client-utils-behaviour,index}.test.cjs`
+type: change
+rationale: Execute the next bounded phase22 slice by adding focused behavioural coverage for shared client utilities to reduce regression risk as direct-service/client-wrapper migration continues.
+impact: Improves confidence in shared client helper contracts (`endpointClient`, `relayClient`) and keeps phase22 aggregate suite aligned with new coverage.
+status: completed
+
+Summary:
+
+- Added new suite: `tests/phase22/client-utils-behaviour.test.cjs`.
+- Added assertions for shared client utility behavior:
+    - `endpointClient.getJson` returns `axios.get(...).data`
+    - `endpointClient.requestJson` returns `axios(config).data`
+    - `relayClient.buildHashedQueryUrl` appends browser hash-service response
+    - server fallback path uses `hashAPIPath` when `HASHKEY` is present
+    - browser/no-HASHKEY failure path rethrows hash-service error
+- Updated `tests/phase22/index.test.cjs` to include the new client-utils suite in the phase aggregate runner.
+
+Validation:
+
+- `node tests/phase22/client-utils-behaviour.test.cjs` -> pass (5/5)
+- `node tests/phase22/index.test.cjs` -> pass
+    - core-token: 2/2
+    - client-utils: 5/5
+    - phase22 combined: pass
+- `npm run lint` -> warnings only (pre-existing `react-hooks/exhaustive-deps`; no new lint errors)
+
+Follow-ups:
+
+- Optional next bounded slice: add focused phase22 behavioural coverage for any future shared client wrappers introduced beyond `endpointClient`/`relayClient`.