[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

src/darwin/Framework/CHIP/MTRDevice_Concrete.mm

@@ -731,6 +731,34 @@ - (void)unitTestSyncRunOnDeviceQueue:(dispatch_block_t)block
 {
     dispatch_sync(self.queue, block);
 }
+
+// Test helper: parse a textual IP address and stash it as the cached
+// "last subscription IP" so the first-Thread-subscribe deferral gate's
+// cached-IP short-circuit can be exercised in pure-ObjC tests without
+// pulling C++ headers into the test sources.  Pass nil to clear.
+- (void)unitTestSetLastSubscriptionIPAddressFromString:(NSString * _Nullable)addressString
+{
+    std::lock_guard lock(_lock);
+    if (addressString == nil) {
+        _lastSubscriptionIPAddress.reset();
+        return;
+    }
+    chip::Inet::IPAddress parsed;
+    if (chip::Inet::IPAddress::FromString(addressString.UTF8String, parsed)) {
+        _lastSubscriptionIPAddress = parsed;
+    } else {
+        _lastSubscriptionIPAddress.reset();
+    }
+}
+
+// Test helper: report whether the cached "last subscription IP" is set.
+// The underlying property is std::optional<chip::Inet::IPAddress> and
+// therefore not KVC-bridgeable into pure-ObjC tests.
+- (BOOL)unitTestHasCachedLastSubscriptionIPAddress
+{
+    std::lock_guard lock(_lock);
+    return _lastSubscriptionIPAddress.has_value();
+}
 #endif
 
 #pragma mark - Time Synchronization