test: add lint job to CI & test improvements

.github/workflows/swiftui-auth.yml

@@ -24,6 +24,19 @@ permissions:
   contents: read
 
 jobs:
+  format-check:
+    name: Swift Format Check
+    runs-on: macos-26
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+
+      - name: Install swiftformat
+        run: brew install swiftformat
+
+      - name: Check Swift formatting
+        run: bash lint-swift.sh
+
   # Package Unit Tests (standalone, no emulator needed)
   unit-tests:
     name: Package Unit Tests
@@ -192,4 +205,4 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: FirebaseSwiftUIExampleUITests.xcresult
-          path: e2eTest/FirebaseSwiftUIExample/FirebaseSwiftUIExampleUITests.xcresult
+          path: e2eTest/FirebaseSwiftUIExample/FirebaseSwiftUIExampleUITests.xcresult

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Views/AuthPickerView.swift

@@ -33,6 +33,7 @@ public struct AuthPickerView<Content: View> {
 extension AuthPickerView: View {
   public var body: some View {
     @Bindable var authService = authService
+    @Bindable var passwordPrompt = authService.passwordPrompt
     content()
       .sheet(isPresented: $authService.isPresented) {
         @Bindable var navigator = authService.navigator
@@ -79,6 +80,10 @@ extension AuthPickerView: View {
         // Apply MFA handling at NavigationStack level
         .mfaHandler()
       }
+      // Centralized password prompt sheet to prevent conflicts
+      .sheet(isPresented: $passwordPrompt.isPromptingPassword) {
+        PasswordPromptSheet(coordinator: authService.passwordPrompt)
+      }
   }
 
   /// Closure for reporting errors from child views

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Views/EnterVerificationCodeView.swift

@@ -106,7 +106,7 @@ struct EnterVerificationCodeView: View {
   return NavigationStack {
     EnterVerificationCodeView(
       verificationID: "mock-id",
-      fullPhoneNumber: "+1 5551234567",
+      fullPhoneNumber: "+1 5551234567"
     )
     .environment(AuthService())
   }

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Views/MFAManagementView.swift

@@ -57,7 +57,6 @@ public struct MFAManagementView {
 
 extension MFAManagementView: View {
   public var body: some View {
-    @Bindable var passwordPrompt = authService.passwordPrompt
     VStack(spacing: 20) {
       // Title section
       VStack {
@@ -135,10 +134,7 @@ extension MFAManagementView: View {
     .onAppear {
       loadEnrolledFactors()
     }
-    // Present password prompt when required for reauthentication
-    .sheet(isPresented: $passwordPrompt.isPromptingPassword) {
-      PasswordPromptSheet(coordinator: authService.passwordPrompt)
-    }
+    // Password prompt sheet now centralized in AuthPickerView
   }
 
   @ViewBuilder

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Views/PrivacyTOCsView.swift

@@ -30,7 +30,7 @@ struct PrivacyTOCsView {
 
   let displayMode: DisplayMode
 
-  public init(displayMode: DisplayMode = .full) {
+  init(displayMode: DisplayMode = .full) {
     self.displayMode = displayMode
   }
 
@@ -61,7 +61,7 @@ struct PrivacyTOCsView {
 }
 
 extension PrivacyTOCsView: View {
-  public var body: some View {
+  var body: some View {
     Group {
       if let tosURL = authService.configuration.tosUrl,
          let privacyURL = authService.configuration.privacyPolicyUrl {

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Views/SignedInView.swift

@@ -38,7 +38,6 @@ public struct SignedInView {
 
 extension SignedInView: View {
   public var body: some View {
-    @Bindable var passwordPrompt = authService.passwordPrompt
     VStack {
       Text(authService.string.signedInTitle)
         .font(.largeTitle)
@@ -144,9 +143,7 @@ extension SignedInView: View {
       )
       .presentationDetents([.medium])
     }
-    .sheet(isPresented: $passwordPrompt.isPromptingPassword) {
-      PasswordPromptSheet(coordinator: authService.passwordPrompt)
-    }
+    // Password prompt sheet now centralized in AuthPickerView
     .sheet(isPresented: $showEmailVerificationSent) {
       VStack(spacing: 24) {
         Text(authService.string.verifyEmailSheetMessage)

FirebaseSwiftUI/FirebaseAuthSwiftUI/Tests/FirebaseAuthSwiftUITests/MFAEnrolmentUnitTests.swift

@@ -29,7 +29,7 @@ import Testing
 @Suite("TOTPEnrollmentInfo Tests")
 struct TOTPEnrollmentInfoTests {
   @Test("Initialization with shared secret key")
-  func testInitializationWithSharedSecretKey() {
+  func initializationWithSharedSecretKey() {
     let validSecrets = [
       "JBSWY3DPEHPK3PXP",
       "GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ",
@@ -47,7 +47,7 @@ struct TOTPEnrollmentInfoTests {
   }
 
   @Test("Initialization with all parameters")
-  func testInitializationWithAllParameters() throws {
+  func initializationWithAllParameters() throws {
     let totpInfo = TOTPEnrollmentInfo(
       sharedSecretKey: "JBSWY3DPEHPK3PXP",
       qrCodeURL: URL(
@@ -71,7 +71,7 @@ struct TOTPEnrollmentInfoTests {
   }
 
   @Test("Verification status transitions")
-  func testVerificationStatusTransitions() {
+  func verificationStatusTransitions() {
     // Default status is pending
     var totpInfo = TOTPEnrollmentInfo(sharedSecretKey: "JBSWY3DPEHPK3PXP")
     #expect(totpInfo.verificationStatus == .pending)

FirebaseSwiftUI/FirebaseAuthUIComponents/Sources/Components/AuthTextField.swift

@@ -24,13 +24,13 @@ public struct AuthTextField<Leading: View>: View {
   let prompt: String
   var textAlignment: TextAlignment = .leading
   var keyboardType: UIKeyboardType = .default
-  var contentType: UITextContentType? = nil
+  var contentType: UITextContentType?
   var isSecureTextField: Bool = false
   var validations: [FormValidator] = []
   var maintainsValidationMessage: Bool = false
-  var formState: ((Bool) -> Void)? = nil
-  var onSubmit: ((String) -> Void)? = nil
-  var onChange: ((String) -> Void)? = nil
+  var formState: ((Bool) -> Void)?
+  var onSubmit: ((String) -> Void)?
+  var onChange: ((String) -> Void)?
   private let leading: () -> Leading?
 
   public init(text: Binding<String>,

FirebaseSwiftUI/FirebaseAuthUIComponents/Sources/Components/CountrySelector.swift

@@ -44,7 +44,7 @@ public struct CountryData: Equatable {
 public struct CountrySelector: View {
   @Binding var selectedCountry: CountryData
   var enabled: Bool = true
-  var allowedCountries: Set<String>? = nil
+  var allowedCountries: Set<String>?
 
   public init(selectedCountry: Binding<CountryData>,
               enabled: Bool = true,

FirebaseSwiftUI/FirebaseAuthUIComponents/Sources/Components/VerificationCodeInputField.swift

@@ -145,7 +145,7 @@ public struct VerificationCodeInputField: View {
       commitCodeChange(truncated)
     }
 
-    if shouldUpdateFocus && (fieldsChanged || forceFocus) {
+    if shouldUpdateFocus, fieldsChanged || forceFocus {
       let newFocus = truncated.count < codeLength ? truncated.count : nil
       DispatchQueue.main.async {
         withAnimation(.easeInOut(duration: 0.2)) {
@@ -154,7 +154,7 @@ public struct VerificationCodeInputField: View {
       }
     }
 
-    if fieldsChanged && truncated.count == codeLength {
+    if fieldsChanged, truncated.count == codeLength {
       DispatchQueue.main.async {
         onCodeComplete(truncated)
       }
@@ -198,8 +198,7 @@ public struct VerificationCodeInputField: View {
     commitCodeChange(newCode)
     onCodeChange(newCode)
 
-    if !digit.isEmpty,
-       let nextIndex = findNextEmptyField(startingFrom: index) {
+    if !digit.isEmpty, let nextIndex = findNextEmptyField(startingFrom: index) {
       DispatchQueue.main.async {
         if focusedIndex != nextIndex {
           withAnimation(.easeInOut(duration: 0.2)) {
@@ -218,7 +217,7 @@ public struct VerificationCodeInputField: View {
 
   private func handleBackspace(at index: Int) {
     // If current field is empty, move to previous field and clear it
-    if digitFields[index].isEmpty && index > 0 {
+    if digitFields[index].isEmpty, index > 0 {
       digitFields[index - 1] = ""
       DispatchQueue.main.async {
         let previousIndex = index - 1

FirebaseSwiftUI/FirebaseAuthUIComponents/Sources/Theme/ProviderStyle.swift

@@ -31,7 +31,7 @@ public struct ProviderStyle: Sendable {
   public let icon: Image?
   public let backgroundColor: Color
   public let contentColor: Color
-  public var iconTint: Color? = nil
+  public var iconTint: Color?
   public let shape: AnyShape = .init(RoundedRectangle(cornerRadius: 4, style: .continuous))
   public let elevation: CGFloat
 

e2eTest/FirebaseSwiftUIExample/FirebaseSwiftUIExample/App/ContentView.swift

@@ -34,7 +34,7 @@ struct ContentView: View {
   init() {
     Auth.auth().useEmulator(withHost: "127.0.0.1", port: 9099)
     Auth.auth().settings?.isAppVerificationDisabledForTesting = true
-    //Auth.auth().signInAnonymously()
+    // Auth.auth().signInAnonymously()
     let actionCodeSettings = ActionCodeSettings()
     actionCodeSettings.handleCodeInApp = true
     actionCodeSettings.url = URL(string: "https://flutterfire-e2e-tests.firebaseapp.com")

e2eTest/FirebaseSwiftUIExample/FirebaseSwiftUIExampleTests/FirebaseSwiftUIExampleTests.swift

@@ -40,7 +40,7 @@ struct FirebaseSwiftUIExampleTests {
 
   @Test
   @MainActor
-  func testDefaultAuthConfigurationInjection() async throws {
+  func defaultAuthConfigurationInjection() async throws {
     let config = AuthConfiguration()
     let service = AuthService(configuration: config)
 
@@ -58,7 +58,7 @@ struct FirebaseSwiftUIExampleTests {
 
   @Test
   @MainActor
-  func testCustomAuthConfigurationInjection() async throws {
+  func customAuthConfigurationInjection() async throws {
     let emailSettings = ActionCodeSettings()
     emailSettings.handleCodeInApp = true
     emailSettings.url = URL(string: "https://example.com/email-link")
@@ -97,7 +97,7 @@ struct FirebaseSwiftUIExampleTests {
 
   @Test
   @MainActor
-  func testCreateEmailPasswordUser() async throws {
+  func createEmailPasswordUser() async throws {
     let service = try await prepareFreshAuthService()
 
     #expect(service.authenticationState == .unauthenticated)
@@ -119,7 +119,7 @@ struct FirebaseSwiftUIExampleTests {
 
   @Test
   @MainActor
-  func testSignInUser() async throws {
+  func signInUser() async throws {
     let service = try await prepareFreshAuthService()
     let email = createEmail()
     try await service.createUser(email: email, password: kPassword)

e2eTest/FirebaseSwiftUIExample/FirebaseSwiftUIExampleUITests/MFAEnrolmentUITests.swift

@@ -235,10 +235,7 @@ final class MFAEnrollmentUITests: XCTestCase {
 
     let displayNameField = app.textFields["display-name-field"]
     XCTAssertTrue(displayNameField.waitForExistence(timeout: 10))
-    UIPasteboard.general.string = "test user"
-    displayNameField.tap()
-    displayNameField.press(forDuration: 1.2)
-    app.menuItems["Paste"].tap()
+    try pasteIntoField(displayNameField, text: "test user", app: app)
 
     let sendCodeButton = app.buttons["send-sms-button"]
     XCTAssertTrue(sendCodeButton.waitForExistence(timeout: 10))
@@ -426,16 +423,12 @@ final class MFAEnrollmentUITests: XCTestCase {
     let emailField = app.textFields["email-field"]
     XCTAssertTrue(emailField.waitForExistence(timeout: 10), "Email field should exist")
     // Workaround for updating SecureFields with ConnectHardwareKeyboard enabled
-    UIPasteboard.general.string = email
-    emailField.press(forDuration: 1.2)
-    app.menuItems["Paste"].tap()
+    try pasteIntoField(emailField, text: email, app: app)
 
     // Fill password field
     let passwordField = app.secureTextFields["password-field"]
     XCTAssertTrue(passwordField.exists, "Password field should exist")
-    UIPasteboard.general.string = password
-    passwordField.press(forDuration: 1.2)
-    app.menuItems["Paste"].tap()
+    try pasteIntoField(passwordField, text: password, app: app)
 
     // Create the user (sign up)
     let signUpButton = app

e2eTest/FirebaseSwiftUIExample/FirebaseSwiftUIExampleUITests/MFAResolutionUITests.swift

@@ -71,7 +71,7 @@ final class MFAResolutionUITests: XCTestCase {
     )
 
     let smsButton = app.buttons["sms-method-button"]
-    if smsButton.exists && smsButton.isEnabled {
+    if smsButton.exists, smsButton.isEnabled {
       smsButton.tap()
     }
     dismissAlert(app: app)
@@ -421,7 +421,7 @@ final class MFAResolutionUITests: XCTestCase {
                                      password: String = "123456") throws {
     // Ensure we're in sign in flow
     let switchFlowButton = app.buttons["switch-auth-flow"]
-    if switchFlowButton.exists && switchFlowButton.label.contains("Sign In") {
+    if switchFlowButton.exists, switchFlowButton.label.contains("Sign In") {
       switchFlowButton.tap()
     }
 

e2eTest/FirebaseSwiftUIExample/FirebaseSwiftUIExampleUITests/TestUtils.swift

@@ -29,6 +29,45 @@ func createEmail() -> String {
   }
 }
 
+// MARK: - Text Input Helpers
+
+/// Pastes text into a text field using the system paste menu
+/// - Parameters:
+///   - field: The XCUIElement representing the text field
+///   - text: The text to paste
+///   - app: The XCUIApplication instance
+@MainActor func pasteIntoField(_ field: XCUIElement, text: String, app: XCUIApplication) throws {
+  UIPasteboard.general.string = text
+  field.tap()
+
+  // Give field time to become first responder
+  usleep(200_000) // 0.2 seconds
+
+  // Press and hold to bring up paste menu
+  field.press(forDuration: 1.5)
+
+  let pasteMenuItem = app.menuItems["Paste"]
+
+  // Wait for paste menu to appear
+  if !pasteMenuItem.waitForExistence(timeout: 3) {
+    // Fallback: try double tap approach
+    field.doubleTap()
+    usleep(300_000) // 0.3 seconds
+
+    if !pasteMenuItem.waitForExistence(timeout: 2) {
+      throw NSError(
+        domain: "TestError",
+        code: 1,
+        userInfo: [
+          NSLocalizedDescriptionKey: "Failed to show paste menu for field. Text was: \(text)",
+        ]
+      )
+    }
+  }
+
+  pasteMenuItem.tap()
+}
+
 // MARK: - User Creation
 
 /// Helper to create a test user in the emulator via REST API (avoids keychain issues)

format-swift.sh

@@ -4,5 +4,7 @@ swiftformat ./FirebaseSwiftUI
 
 swiftformat ./samples/swiftui/FirebaseSwiftUIExample
 
+swiftformat ./e2eTest
+
+swiftformat ./Package.swift
 
-swiftformat ./Package.swift

lint-swift.sh

@@ -0,0 +1,7 @@
+swiftformat --lint ./FirebaseSwiftUI
+
+swiftformat --lint ./samples/swiftui/FirebaseSwiftUIExample
+
+swiftformat --lint ./e2eTest
+
+swiftformat --lint ./Package.swift