test(macos): make env/defaults helper Swift 6-safe

apps/macos/Tests/ClawdbotIPCTests/LowCoverageHelperTests.swift

@@ -94,7 +94,7 @@ struct LowCoverageHelperTests {
     }
 
     @Test func gatewayLaunchAgentHelpers() async throws {
-        try await TestIsolation.withEnvValues(
+        await TestIsolation.withEnvValues(
             [
                 "CLAWDBOT_GATEWAY_BIND": "Lan",
                 "CLAWDBOT_GATEWAY_TOKEN": " secret ",

apps/macos/Tests/ClawdbotIPCTests/TestIsolation.swift

@@ -6,7 +6,7 @@ actor TestIsolationLock {
     private var locked = false
     private var waiters: [CheckedContinuation<Void, Never>] = []
 
-    private func lock() async {
+    func acquire() async {
         if !self.locked {
             self.locked = true
             return
@@ -17,7 +17,7 @@ actor TestIsolationLock {
         // `unlock()` resumed us; lock is now held for this caller.
     }
 
-    private func unlock() {
+    func release() {
         if self.waiters.isEmpty {
             self.locked = false
             return
@@ -25,78 +25,90 @@ actor TestIsolationLock {
         let next = self.waiters.removeFirst()
         next.resume()
     }
-
-    func withLock<T: Sendable>(_ body: @Sendable () async throws -> T) async rethrows -> T {
-        await self.lock()
-        defer { self.unlock() }
-        return try await body()
-    }
 }
 
+@MainActor
 enum TestIsolation {
-    static func withIsolatedState<T: Sendable>(
+    static func withIsolatedState<T>(
         env: [String: String?] = [:],
         defaults: [String: Any?] = [:],
-        _ body: @Sendable () async throws -> T) async rethrows -> T
+        _ body: () async throws -> T) async rethrows -> T
     {
-        try await TestIsolationLock.shared.withLock {
-            var previousEnv: [String: String?] = [:]
-            for (key, value) in env {
-                previousEnv[key] = getenv(key).map { String(cString: $0) }
-                if let value {
-                    setenv(key, value, 1)
-                } else {
-                    unsetenv(key)
-                }
+        await TestIsolationLock.shared.acquire()
+        var previousEnv: [String: String?] = [:]
+        for (key, value) in env {
+            previousEnv[key] = getenv(key).map { String(cString: $0) }
+            if let value {
+                setenv(key, value, 1)
+            } else {
+                unsetenv(key)
             }
+        }
 
-            let userDefaults = UserDefaults.standard
-            var previousDefaults: [String: Any?] = [:]
-            for (key, value) in defaults {
-                previousDefaults[key] = userDefaults.object(forKey: key)
+        let userDefaults = UserDefaults.standard
+        var previousDefaults: [String: Any?] = [:]
+        for (key, value) in defaults {
+            previousDefaults[key] = userDefaults.object(forKey: key)
+            if let value {
+                userDefaults.set(value, forKey: key)
+            } else {
+                userDefaults.removeObject(forKey: key)
+            }
+        }
+
+        do {
+            let result = try await body()
+            for (key, value) in previousDefaults {
                 if let value {
                     userDefaults.set(value, forKey: key)
                 } else {
                     userDefaults.removeObject(forKey: key)
                 }
             }
-
-            defer {
-                for (key, value) in previousDefaults {
-                    if let value {
-                        userDefaults.set(value, forKey: key)
-                    } else {
-                        userDefaults.removeObject(forKey: key)
-                    }
-                }
-                for (key, value) in previousEnv {
-                    if let value {
-                        setenv(key, value, 1)
-                    } else {
-                        unsetenv(key)
-                    }
+            for (key, value) in previousEnv {
+                if let value {
+                    setenv(key, value, 1)
+                } else {
+                    unsetenv(key)
                 }
             }
-
-            return try await body()
+            await TestIsolationLock.shared.release()
+            return result
+        } catch {
+            for (key, value) in previousDefaults {
+                if let value {
+                    userDefaults.set(value, forKey: key)
+                } else {
+                    userDefaults.removeObject(forKey: key)
+                }
+            }
+            for (key, value) in previousEnv {
+                if let value {
+                    setenv(key, value, 1)
+                } else {
+                    unsetenv(key)
+                }
+            }
+            await TestIsolationLock.shared.release()
+            throw error
         }
     }
 
-    static func withEnvValues<T: Sendable>(
+    static func withEnvValues<T>(
         _ values: [String: String?],
-        _ body: @Sendable () async throws -> T) async rethrows -> T
+        _ body: () async throws -> T) async rethrows -> T
     {
         try await Self.withIsolatedState(env: values, defaults: [:], body)
     }
 
-    static func withUserDefaultsValues<T: Sendable>(
+    static func withUserDefaultsValues<T>(
         _ values: [String: Any?],
-        _ body: @Sendable () async throws -> T) async rethrows -> T
+        _ body: () async throws -> T) async rethrows -> T
     {
         try await Self.withIsolatedState(env: [:], defaults: values, body)
     }
 
-    static func tempConfigPath() -> String {
+    nonisolated static func tempConfigPath() -> String {
         FileManager.default.temporaryDirectory
             .appendingPathComponent("clawdbot-test-config-\(UUID().uuidString).json")
             .path