fix: update session timed out error handling (#65)

* fix: update session timed out error to be non-blocking

* chore: remove duplicate code

* chore: fix failed timed out unit test

Author: phantumcode

Sources/FaceLiveness/Views/Liveness/FaceLivenessDetectionViewModel+FaceDetectionResultHandler.swift

@@ -89,9 +89,7 @@ extension FaceLivenessDetectionViewModel: FaceDetectionResultHandler {
             noFitStartTime = Date()
         }
         if let elapsedTime = noFitStartTime?.timeIntervalSinceNow, abs(elapsedTime) >= noFitTimeoutInterval {
-            self.livenessState
-                .unrecoverableStateEncountered(.timedOut)
-            self.captureSession.stopRunning()
+            handleSessionTimedOut()
         }
     }
 
@@ -100,9 +98,7 @@ extension FaceLivenessDetectionViewModel: FaceDetectionResultHandler {
             noFitStartTime = Date()
         }
         if let elapsedTime = noFitStartTime?.timeIntervalSinceNow, abs(elapsedTime) >= noFitTimeoutInterval {
-            self.livenessState
-                .unrecoverableStateEncountered(.timedOut)
-            self.captureSession.stopRunning()
+            handleSessionTimedOut()
         }
     }
 
@@ -130,4 +126,12 @@ extension FaceLivenessDetectionViewModel: FaceDetectionResultHandler {
             }
         }
     }
+    
+    private func handleSessionTimedOut() {
+        DispatchQueue.main.async {
+            self.livenessState
+                .unrecoverableStateEncountered(.timedOut)
+            self.captureSession.stopRunning()
+        }
+    }
 }

Tests/FaceLivenessTests/LivenessTests.swift

@@ -152,6 +152,7 @@ final class FaceLivenessDetectionViewModelTestCase: XCTestCase {
         XCTAssertNotEqual(self.viewModel.livenessState.state,  .encounteredUnrecoverableError(.timedOut))
         try await Task.sleep(seconds: 1)
         self.viewModel.handleNoFaceFit(instruction: .tooFar(nearnessPercentage: 0.2), percentage: 0.2)
+        try await Task.sleep(seconds: 1)
         XCTAssertEqual(self.viewModel.livenessState.state,  .encounteredUnrecoverableError(.timedOut))
     }
 
@@ -168,6 +169,7 @@ final class FaceLivenessDetectionViewModelTestCase: XCTestCase {
         XCTAssertNotEqual(self.viewModel.livenessState.state,  .encounteredUnrecoverableError(.timedOut))
         try await Task.sleep(seconds: 1)
         self.viewModel.handleNoFaceDetected()
+        try await Task.sleep(seconds: 1)
         XCTAssertEqual(self.viewModel.livenessState.state,  .encounteredUnrecoverableError(.timedOut))
     }
 }