move call to background thread

packages/webview_flutter/webview_flutter_wkwebview/darwin/webview_flutter_wkwebview/Sources/webview_flutter_wkwebview/SecTrustProxyAPIDelegate.swift

@@ -18,13 +18,20 @@ import Foundation
 /// This class may handle instantiating native object instances that are attached to a Dart instance
 /// or handle method calls on the associated native class or an instance of that class.
 class SecTrustProxyAPIDelegate : PigeonApiDelegateSecTrust {
-  func evaluateWithError(pigeonApi: PigeonApiSecTrust, trust: SecTrustWrapper) throws -> Bool {
-    var error: CFError?
-    let result = secTrustEvaluateWithError(trust.value, &error)
-    if let error = error {
-      throw PigeonError(code: CFErrorGetDomain(error) as String, message: CFErrorCopyDescription(error) as String, details: nil)
+  func evaluateWithError(pigeonApi: PigeonApiSecTrust, trust: SecTrustWrapper, completion: @escaping (Result<Bool, any Error>) -> Void) {
+    /// `SecTrustEvaluateWithError` should not be called on main thread, so this calls the method on a background thread.
+    DispatchQueue.global().async {
+      var error: CFError?
+      let result = self.secTrustEvaluateWithError(trust.value, &error)
+
+      DispatchQueue.main.async {
+        if let error = error {
+          completion(Result.failure(PigeonError(code: CFErrorGetDomain(error) as String, message: CFErrorCopyDescription(error) as String, details: nil)))
+        } else {
+          completion(Result.success(result))
+        }
+      }
     }
-    return result
   }
 
   func copyExceptions(pigeonApi: PigeonApiSecTrust, trust: SecTrustWrapper) throws -> FlutterStandardTypedData? {

packages/webview_flutter/webview_flutter_wkwebview/darwin/webview_flutter_wkwebview/Sources/webview_flutter_wkwebview/WebKitLibrary.g.swift

@@ -9735,7 +9735,7 @@ class GetTrustResultResponseProxyAPITests: XCTestCase {
 
 protocol PigeonApiDelegateSecTrust {
   /// Evaluates trust for the specified certificate and policies.
-  func evaluateWithError(pigeonApi: PigeonApiSecTrust, trust: SecTrustWrapper) throws -> Bool
+  func evaluateWithError(pigeonApi: PigeonApiSecTrust, trust: SecTrustWrapper, completion: @escaping (Result<Bool, Error>) -> Void)
   /// Returns an opaque cookie containing exceptions to trust policies that will
   /// allow future evaluations of the current certificate to succeed.
   func copyExceptions(pigeonApi: PigeonApiSecTrust, trust: SecTrustWrapper) throws -> FlutterStandardTypedData?
@@ -9774,11 +9774,13 @@ final class PigeonApiSecTrust: PigeonApiProtocolSecTrust  {
       evaluateWithErrorChannel.setMessageHandler { message, reply in
         let args = message as! [Any?]
         let trustArg = args[0] as! SecTrustWrapper
-        do {
-          let result = try api.pigeonDelegate.evaluateWithError(pigeonApi: api, trust: trustArg)
-          reply(wrapResult(result))
-        } catch {
-          reply(wrapError(error))
+        api.pigeonDelegate.evaluateWithError(pigeonApi: api, trust: trustArg) { result in
+          switch result {
+          case .success(let res):
+            reply(wrapResult(res))
+          case .failure(let error):
+            reply(wrapError(error))
+          }
         }
       }
     } else {
@@ -9895,7 +9897,7 @@ import Foundation
 /// This class may handle instantiating native object instances that are attached to a Dart instance
 /// or handle method calls on the associated native class or an instance of that class.
 class SecTrustProxyAPIDelegate : PigeonApiDelegateSecTrust {
-  func evaluateWithError(pigeonApi: PigeonApiSecTrust, trust: SecTrustWrapper) throws -> Bool {
+  func evaluateWithError(pigeonApi: PigeonApiSecTrust, trust: SecTrustWrapper, completion: @escaping (Result<Bool, PigeonError>) -> Void) {
     return SecTrust.evaluateWithError(trust: trust)
   }
 

packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/SecTrustProxyAPITests.swift

@@ -27,10 +27,22 @@ class SecTrustProxyAPITests: XCTestCase {
     let delegate = TestSecTrustProxyAPIDelegate()
     let api = PigeonApiSecTrust(pigeonRegistrar: registrar, delegate: delegate)
 
+    let expect = expectation(description: "Wait for setCookie.")
     let trust = createTrust(delegate: delegate)
-    let value = try? api.pigeonDelegate.evaluateWithError(pigeonApi: api, trust: trust)
+    var resultValue: Bool?
+
+    api.pigeonDelegate.evaluateWithError(pigeonApi: api, trust: trust) { result in
+      switch result {
+      case .success(let value):
+        resultValue = value
+      case .failure(_):
+        break
+      }
+      expect.fulfill()
+    }
 
-    XCTAssertEqual(value, true)
+    wait(for: [expect], timeout: 5.0)
+    XCTAssertEqual(resultValue, true)
   }
 
   func testCopyExceptions() {

packages/webview_flutter/webview_flutter_wkwebview/pigeons/web_kit.dart

@@ -1191,6 +1191,7 @@ abstract class GetTrustResultResponse extends NSObject {
 abstract class SecTrust extends NSObject {
   /// Evaluates trust for the specified certificate and policies.
   @static
+  @async
   bool evaluateWithError(SecTrust trust);
 
   /// Returns an opaque cookie containing exceptions to trust policies that will