test: Add biometric prompt to permissions (#3624)

Add a button to trigger biometric prompt for the iOS-Swift test app.

Author: philipphofmann

Samples/iOS-Swift/iOS-Swift/Info.plist

@@ -2,6 +2,9 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+
+	<key>NSFaceIDUsageDescription</key>
+	<string>$(PRODUCT_NAME) Authentication with TouchId or FaceID for testing purposes of the Sentry Cocoa SDK.</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleExecutable</key>

Samples/iOS-Swift/iOS-Swift/ViewControllers/PermissionsViewController.swift

@@ -1,4 +1,5 @@
 import CoreLocation
+import LocalAuthentication
 import UIKit
 
 class PermissionsViewController: UIViewController {
@@ -18,9 +19,16 @@ class PermissionsViewController: UIViewController {
         button.addTarget(self, action: #selector(requestLocationPermission), for: .touchUpInside)
         return button
     }()
+    
+    private lazy var biometricButton: UIButton = {
+        let button = UIButton(type: .system)
+        button.setTitle("Request Biometric Permission", for: .normal)
+        button.addTarget(self, action: #selector(requestBiometricPermission), for: .touchUpInside)
+        return button
+    }()
 
     private lazy var stackView: UIStackView = {
-        let stackView = UIStackView(arrangedSubviews: [pushPermissionButton, locationPermissionButton])
+        let stackView = UIStackView(arrangedSubviews: [pushPermissionButton, locationPermissionButton, biometricButton])
         stackView.axis = .vertical
         stackView.spacing = 10
         stackView.alignment = .center
@@ -71,6 +79,34 @@ class PermissionsViewController: UIViewController {
                 print(granted)
             }
     }
+    
+    @objc func requestBiometricPermission() {
+        let context = LAContext()
+        var error: NSError?
+
+        if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) {
+            let reason = "Identify yourself!"
+
+            context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason) { success, _ in
+
+                DispatchQueue.main.async {
+                    if success {
+                        let crumb = Breadcrumb()
+                        crumb.message = "Biometry success"
+                        SentrySDK.addBreadcrumb(crumb)
+                    } else {
+                        let crumb = Breadcrumb()
+                        crumb.message = "Biometry failure"
+                        SentrySDK.addBreadcrumb(crumb)
+                    }
+                }
+            }
+        } else {
+            let ac = UIAlertController(title: "No biometry", message: "Couldn't access biometry.", preferredStyle: .alert)
+            ac.addAction(UIAlertAction(title: "OK", style: .default))
+            self.present(ac, animated: true)
+        }
+    }
 }
 
 extension PermissionsViewController: CLLocationManagerDelegate {