Add unit tests for ActionCodeURL (#14683)

Author: paulb777

FirebaseAuth/Tests/Unit/ActionCodeURLTests.swift

@@ -0,0 +1,89 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+@testable import FirebaseAuth
+import Foundation
+import XCTest
+
+/// Unit tests for ActionCodeURL
+class ActionCodeURLTests: XCTestCase {
+
+  /// Tests parsing a valid URL with resetPassword mode.
+  func testParseURL() {
+    let urlString = "https://www.example.com?apiKey=API_KEY&mode=resetPassword&oobCode=OOB_CODE"
+    let actionCodeURL = ActionCodeURL(link: urlString)
+    XCTAssertNotNil(actionCodeURL)
+    XCTAssertEqual(actionCodeURL?.apiKey, "API_KEY")
+    XCTAssertEqual(actionCodeURL?.operation, .passwordReset)
+    XCTAssertEqual(actionCodeURL?.code, "OOB_CODE")
+  }
+
+  /// Tests parsing an invalid URL.
+  func testParseInvalidURL() {
+    let urlString = "invalid_url"
+    let actionCodeURL = ActionCodeURL(link: urlString)
+    XCTAssertNil(actionCodeURL)
+  }
+
+  /// Tests parsing a URL with missing parameters.
+  func testParseURLMissingParameters() {
+    let urlString = "https://www.example.com"
+    let actionCodeURL = ActionCodeURL(link: urlString)
+    XCTAssertNil(actionCodeURL)
+  }
+
+  // Tests parsing a URL with an operation and a code.
+  func testParseURLDifferentMode() {
+    let urlString = "https://www.example.com?apiKey=API_KEY&mode=verifyEmail&oobCode=OOB_CODE"
+    let actionCodeURL = ActionCodeURL(link: urlString)
+    XCTAssertNotNil(actionCodeURL)
+    XCTAssertEqual(actionCodeURL?.apiKey, "API_KEY")
+    XCTAssertEqual(actionCodeURL?.operation, .verifyEmail)
+    XCTAssertEqual(actionCodeURL?.code, "OOB_CODE")
+  }
+
+  /// Tests parsing a URL with all properties.
+  func testParseURLWithAllProperties() {
+    let urlString =
+      "https://www.example.com?apiKey=API_KEY&mode=recoverEmail&oobCode=OOB_CODE&continueUrl=https://www.continue.com&lang=en"
+    let actionCodeURL = ActionCodeURL(link: urlString)
+    XCTAssertNotNil(actionCodeURL)
+    XCTAssertEqual(actionCodeURL?.apiKey, "API_KEY")
+    XCTAssertEqual(actionCodeURL?.operation, .recoverEmail)
+    XCTAssertEqual(actionCodeURL?.code, "OOB_CODE")
+    XCTAssertEqual(actionCodeURL?.continueURL?.absoluteString, "https://www.continue.com")
+    XCTAssertEqual(actionCodeURL?.languageCode, "en")
+  }
+
+  /// Tests parsing a URL with missing oobCode.
+  func testParseURLMissingOobCode() {
+    let urlString = "https://www.example.com?apiKey=API_KEY&mode=resetPassword"
+    let actionCodeURL = ActionCodeURL(link: urlString)
+    XCTAssertNil(actionCodeURL?.code)
+  }
+
+  /// Tests parsing a URL with invalid mode.
+  func testParseURLInvalidMode() {
+    let urlString = "https://www.example.com?apiKey=API_KEY&mode=invalidMode&oobCode=OOB_CODE"
+    let actionCodeURL = ActionCodeURL(link: urlString)
+    XCTAssertEqual(actionCodeURL?.operation, .unknown)
+  }
+
+  /// Tests parsing a URL with language code.
+  func testActionCodeURL_languageCode() {
+    let urlString = "https://example.com?lang=fr"
+    let actionCodeURL = ActionCodeURL(link: urlString)
+    XCTAssertEqual(actionCodeURL?.languageCode, "fr")
+  }
+}