test: createUser/sign in with email/password

Author: russellwheatley

samples/swiftui/FirebaseSwiftUIExample/FirebaseSwiftUIExampleTests/FirebaseSwiftUIExampleTests.swift

@@ -4,12 +4,61 @@
 //
 //  Created by Russell Wheatley on 18/02/2025.
 //
-
+import FirebaseAuth
+import FirebaseAuthSwiftUI
+import FirebaseCore
 @testable import FirebaseSwiftUIExample
 import Testing
 
+let kEmailAddress = "[email protected]"
+let kPassword = "123456"
+
 struct FirebaseSwiftUIExampleTests {
-  @Test func example() async throws {
-    // Write your test here and use APIs like `#expect(...)` to check expected conditions.
+  @MainActor
+  func prepareFreshAuthService() async throws -> AuthService {
+    configureFirebaseIfNeeded()
+    try await clearAuthEmulatorState()
+
+    let auth = Auth.auth()
+    return AuthService(auth: auth)
+  }
+
+  @Test
+  @MainActor
+  func testCreateEmailPasswordUser() async throws {
+    let service = try await prepareFreshAuthService()
+
+    #expect(service.authenticationState == .unauthenticated)
+    #expect(service.authView == .authPicker)
+    #expect(service.errorMessage.isEmpty)
+    #expect(service.signedInCredential == nil)
+    try await service.createUser(withEmail: kEmailAddress, password: kPassword)
+
+    #expect(service.authenticationState == .authenticated)
+    #expect(service.authView == .authPicker)
+    #expect(service.errorMessage.isEmpty)
+    // TODO: - reinstate once this PR is merged: https://github.com/firebase/FirebaseUI-iOS/pull/1256
+//    #expect(service.signedInCredential is AuthCredential)
+  }
+
+  @Test
+  @MainActor
+  func testSignInUser() async throws {
+    let service = try await prepareFreshAuthService()
+    // TODO: - it clears emulator data but seems like it is still there?
+//    try await service.createUser(withEmail: kEmailAddress, password: kPassword)
+//    try await service.signOut()
+//    #expect(service.authenticationState == .unauthenticated)
+//    #expect(service.authView == .authPicker)
+//    #expect(service.errorMessage.isEmpty)
+//    #expect(service.signedInCredential == nil)
+
+    try await service.signIn(withEmail: kEmailAddress, password: kPassword)
+
+    #expect(service.authenticationState == .authenticated)
+    #expect(service.authView == .authPicker)
+    #expect(service.errorMessage.isEmpty)
+    // TODO: - reinstate once this PR is merged: https://github.com/firebase/FirebaseUI-iOS/pull/1256
+//    #expect(service.signedInCredential is AuthCredential)
   }
 }

samples/swiftui/FirebaseSwiftUIExample/FirebaseSwiftUIExampleTests/TestHarness.swift

@@ -0,0 +1,59 @@
+//
+//  TestHarness.swift
+//  FirebaseSwiftUIExample
+//
+//  Created by Russell Wheatley on 16/05/2025.
+//
+
+import FirebaseAuth
+import FirebaseCore
+
+/// Call this at the beginning of any integration test to ensure Firebase is configured and pointed
+/// to the Auth Emulator.
+@MainActor
+func configureFirebaseIfNeeded() {
+  if FirebaseApp.app() == nil {
+    FirebaseApp.configure()
+  }
+  Auth.auth().useEmulator(withHost: "localhost", port: 9099)
+}
+
+private var hasCheckedEmulatorAvailability = false
+
+@MainActor
+func isEmulatorRunning() async throws {
+  if hasCheckedEmulatorAvailability { return }
+  let healthCheckURL = URL(string: "http://localhost:9099/")!
+  var healthRequest = URLRequest(url: healthCheckURL)
+  healthRequest.httpMethod = "HEAD"
+
+  let session = URLSession(configuration: .ephemeral)
+  let (_, response) = try await session.data(for: healthRequest)
+
+  guard let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
+    throw NSError(
+      domain: "FirebaseAuthSwiftUITests",
+      code: 1,
+      userInfo: [
+        NSLocalizedDescriptionKey: """
+        🔌 Firebase Auth Emulator is not running on localhost:9099.
+        Please run: `firebase emulators:start --only auth`
+        """,
+      ]
+    )
+  }
+  hasCheckedEmulatorAvailability = true
+}
+
+@MainActor
+func clearAuthEmulatorState(projectID: String = "flutterfire-e2e-tests") async throws {
+  try await isEmulatorRunning()
+  let url = URL(string: "http://localhost:9099/emulator/v1/projects/\(projectID)/accounts")!
+  var request = URLRequest(url: url)
+  request.httpMethod = "DELETE"
+  let (data, response) = try await URLSession.shared.data(for: request)
+
+  if let httpResponse = response as? HTTPURLResponse {
+    print("🔥 clearAuthEmulatorState: status = \(httpResponse.statusCode)")
+  }
+}