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diff --git a/Example/Auth/Tests/FIREmailLinkRequestTests.m b/Example/Auth/Tests/FIREmailLinkRequestTests.m
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+/*
+ * Copyright 2017 Google
+ *
+ * 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.
+ */
+
+#import <XCTest/XCTest.h>
+
+#import "FIRAuthErrors.h"
+#import "FIRAuthBackend.h"
+#import "FIREmailLinkSignInRequest.h"
+#import "FIREmailLinkSignInResponse.h"
+#import "FIRFakeBackendRPCIssuer.h"
+
+/** @var kTestAPIKey
+    @brief Fake API key used for testing.
+ */
+static NSString *const kTestAPIKey = @"APIKey";
+
+/** @var kTestEmail
+    @brief The key for the "email" value in the request.
+ */
+static NSString *const kTestEmail = @"TestEmail@email.com";
+
+/** @var kTestOOBCode
+    @brief The test value for the "oobCode" in the request.
+ */
+static NSString *const kTestOOBCode = @"TestOOBCode";
+
+/** @var kTestIDToken
+    @brief The test value for "idToken" in the request.
+ */
+static NSString *const kTestIDToken = @"testIDToken";
+
+/** @var kEmailKey
+    @brief The key for the "identifier" value in the request.
+ */
+static NSString *const kEmailKey = @"email";
+
+/** @var kEmailLinkKey
+    @brief The key for the "oobCode" value in the request.
+ */
+static NSString *const kOOBCodeKey = @"oobCode";
+
+/** @var kIDTokenKey
+    @brief The key for the "IDToken" value in the request.
+ */
+static NSString *const kIDTokenKey = @"idToken";
+
+/** @var kExpectedAPIURL
+    @brief The value of the expected URL (including the backend endpoint) in the request.
+ */
+static NSString *const kExpectedAPIURL =
+    @"https://www.googleapis.com/identitytoolkit/v3/relyingparty/emailLinkSignin?key=APIKey";
+
+/** @class FIREmailLinkRequestTests
+    @brief Tests for @c FIREmailLinkRequests.
+ */
+@interface FIREmailLinkRequestTests : XCTestCase
+@end
+
+@implementation FIREmailLinkRequestTests {
+  /** @var _RPCIssuer
+      @brief This backend RPC issuer is used to fake network responses for each test in the suite.
+          In the @c setUp method we initialize this and set @c FIRAuthBackend's RPC issuer to it.
+   */
+  FIRFakeBackendRPCIssuer *_RPCIssuer;
+
+  /** @var _requestConfiguration
+      @brief This is the request configuration used for testing.
+   */
+  FIRAuthRequestConfiguration *_requestConfiguration;
+}
+
+- (void)setUp {
+  [super setUp];
+  FIRFakeBackendRPCIssuer *RPCIssuer = [[FIRFakeBackendRPCIssuer alloc] init];
+  [FIRAuthBackend setDefaultBackendImplementationWithRPCIssuer:RPCIssuer];
+  _RPCIssuer = RPCIssuer;
+  _requestConfiguration = [[FIRAuthRequestConfiguration alloc] initWithAPIKey:kTestAPIKey];
+}
+
+- (void)tearDown {
+  _RPCIssuer = nil;
+  _requestConfiguration = nil;
+  [FIRAuthBackend setDefaultBackendImplementationWithRPCIssuer:nil];
+  [super tearDown];
+}
+
+/** @fn testEmailLinkRequestCreation
+    @brief Tests the email link sign-in request with mandatory parameters.
+ */
+- (void)testEmailLinkRequest {
+  FIREmailLinkSignInRequest *request =
+      [[FIREmailLinkSignInRequest alloc] initWithEmail:kTestEmail
+                                               oobCode:kTestOOBCode
+                                  requestConfiguration:_requestConfiguration];
+  [FIRAuthBackend emailLinkSignin:request callback:^(FIREmailLinkSignInResponse *_Nullable response,
+                                                     NSError *_Nullable error) {
+  }];
+  XCTAssertEqualObjects(_RPCIssuer.requestURL.absoluteString, kExpectedAPIURL);
+  XCTAssertNotNil(_RPCIssuer.decodedRequest);
+  XCTAssertEqualObjects(_RPCIssuer.decodedRequest[kEmailKey], kTestEmail);
+  XCTAssertEqualObjects(_RPCIssuer.decodedRequest[kOOBCodeKey], kTestOOBCode);
+  XCTAssertNil(_RPCIssuer.decodedRequest[kIDTokenKey]);
+}
+
+/** @fn testEmailLinkRequestCreationOptional
+    @brief Tests the email link sign-in request with mandatory parameters and optional ID token.
+ */
+- (void)testEmailLinkRequestCreationOptional {
+  FIREmailLinkSignInRequest *request =
+      [[FIREmailLinkSignInRequest alloc] initWithEmail:kTestEmail
+                                               oobCode:kTestOOBCode
+                                  requestConfiguration:_requestConfiguration];
+  request.IDToken = kTestIDToken;
+  [FIRAuthBackend emailLinkSignin:request callback:^(FIREmailLinkSignInResponse *_Nullable response,
+                                                     NSError *_Nullable error) {
+  }];
+  XCTAssertEqualObjects(_RPCIssuer.requestURL.absoluteString, kExpectedAPIURL);
+  XCTAssertNotNil(_RPCIssuer.decodedRequest);
+  XCTAssertEqualObjects(_RPCIssuer.decodedRequest[kEmailKey], kTestEmail);
+  XCTAssertEqualObjects(_RPCIssuer.decodedRequest[kOOBCodeKey], kTestOOBCode);
+  XCTAssertEqualObjects(_RPCIssuer.decodedRequest[kIDTokenKey], kTestIDToken);
+}
+
+@end