Close display verification races

tests/quickshell/displays-contract.sh

@@ -37,6 +37,8 @@ fail() {
 for contract in \
     'property var pendingRequested:' \
     'property var revertExpected:' \
+    'property bool revertVerificationActive:' \
+    'property int revertGeneration:' \
     'readonly property bool canConfirm:' \
     'function matchesRequest(' \
     'function scalesForMode(' \
@@ -180,6 +182,14 @@ done
 run ipc show 2>/dev/null | rg -q '^target displays-test$' || fail 'test IPC target did not start'
 harness_pid="$(run list | awk '/Process ID:/ { print $3; exit }')"
 
+refresh_fixture="$(run ipc call displays-test refreshIdentityFixture)"
+jq -e '
+    .count == 2
+    and .modes == ["[email protected]", "[email protected]"]
+    and .selected == ["[email protected]"]
+' <<<"$refresh_fixture" >/dev/null \
+    || fail "59.94 Hz and 60.00 Hz lost their distinct selection identity: $refresh_fixture"
+
 for _ in $(seq 1 50); do
     [[ "$(status | jq -r .count)" != "0" ]] && break
     sleep 0.1