Add in initializer with config tests.

GoogleSignIn/Sources/GIDVerifyAccountDetail/Implementations/GIDVerifyAccountDetail.m

@@ -27,7 +27,7 @@
 
 @implementation GIDVerifyAccountDetail
 
-- (instancetype)initWithConfig:(GIDConfiguration *)configuration {
+- (instancetype)initWithConfig:(nullable GIDConfiguration *)configuration {
   self = [super init];
   if (self) {
     _configuration = configuration;

GoogleSignIn/Sources/Public/GoogleSignIn/GIDVerifyAccountDetail.h

@@ -43,7 +43,7 @@ typedef void (^GIDVerifyCompletion)(GIDVerifiedAccountDetailResult *_Nullable ve
 /// The active configuration for this instance of `GIDVerifyAccountDetail`.
 @property(nonatomic, nullable) GIDConfiguration *configuration;
 
-- (instancetype)initWithConfig:(GIDConfiguration *)config
+- (instancetype)initWithConfig:(nullable GIDConfiguration *)config
 NS_DESIGNATED_INITIALIZER;
 
 /// Starts an interactive verification flow.

GoogleSignIn/Tests/Unit/GIDVerifyAccountDetailTest.m

@@ -22,6 +22,9 @@
 #import "GoogleSignIn/Tests/Unit/GIDFakeMainBundle.h"
 
 static NSString * const kClientId = @"FakeClientID";
+static NSString * const kServerClientId = @"FakeServerClientID";
+static NSString * const kOpenIDRealm = @"FakeRealm";
+static NSString * const kFakeHostedDomain = @"fakehosteddomain.com";
 
 @interface GIDVerifyAccountDetailTests : XCTestCase {
 @private
@@ -54,13 +57,61 @@ static NSString * const kClientId = @"FakeClientID";
   _verifiableAccountDetails = @[ageOver18Detail];
 
   _fakeMainBundle = [[GIDFakeMainBundle alloc] init];
-  [_fakeMainBundle startFakingWithClientID:kClientId];
-  [_fakeMainBundle fakeAllSchemesSupported];
 }
 
 
 #pragma mark - Tests
 
+- (void)testInit {
+  [_fakeMainBundle startFakingWithClientID:kClientId];
+
+  GIDVerifyAccountDetail *verifyAccountDetail = [[GIDVerifyAccountDetail alloc] init];
+  XCTAssertNotNil(verifyAccountDetail.configuration);
+  XCTAssertEqual(verifyAccountDetail.configuration.clientID, kClientId);
+  XCTAssertNil(verifyAccountDetail.configuration.serverClientID);
+  XCTAssertNil(verifyAccountDetail.configuration.hostedDomain);
+  XCTAssertNil(verifyAccountDetail.configuration.openIDRealm);
+
+}
+
+- (void)testInit_noConfig {
+  [_fakeMainBundle startFakingWithClientID:kClientId];
+  [_fakeMainBundle fakeWithClientID:nil
+                     serverClientID:nil
+                       hostedDomain:nil
+                        openIDRealm:nil];
+  GIDVerifyAccountDetail *verifyAccountDetail = [[GIDVerifyAccountDetail alloc] init];
+
+  XCTAssertNil(verifyAccountDetail.configuration);
+}
+
+
+- (void)testInit_fullConfig {
+  [_fakeMainBundle startFakingWithClientID:kClientId];
+  [_fakeMainBundle fakeWithClientID:kClientId
+                     serverClientID:kServerClientId
+                       hostedDomain:kFakeHostedDomain
+                        openIDRealm:kOpenIDRealm];
+
+  GIDVerifyAccountDetail *verifyAccountDetail = [[GIDVerifyAccountDetail alloc] init];
+  XCTAssertNotNil(verifyAccountDetail.configuration);
+  XCTAssertEqual(verifyAccountDetail.configuration.clientID, kClientId);
+  XCTAssertEqual(verifyAccountDetail.configuration.serverClientID, kServerClientId);
+  XCTAssertEqual(verifyAccountDetail.configuration.hostedDomain, kFakeHostedDomain);
+  XCTAssertEqual(verifyAccountDetail.configuration.openIDRealm, kOpenIDRealm);
+}
+
+- (void)testInit_invalidConfig {
+  [_fakeMainBundle startFakingWithClientID:kClientId];
+  [_fakeMainBundle fakeWithClientID:@[ @"bad", @"config", @"values" ]
+                     serverClientID:nil
+                       hostedDomain:nil
+                        openIDRealm:nil];
+
+  GIDVerifyAccountDetail *verifyAccountDetail = [[GIDVerifyAccountDetail alloc] init];
+  XCTAssertNil(verifyAccountDetail.configuration);
+}
+
 - (void)testPresentingViewControllerException {
   _presentingViewController = nil;
 
@@ -74,35 +125,21 @@ static NSString * const kClientId = @"FakeClientID";
 #pragma GCC diagnostic ignored "-Wnonnull"
   _verifyAccountDetail.configuration = [[GIDConfiguration alloc] initWithClientID:nil];
 #pragma GCC diagnostic pop
-  BOOL threw = NO;
-  @try {
-    [_verifyAccountDetail verifyAccountDetails:_verifiableAccountDetails
-                      presentingViewController:_presentingViewController
-                                    completion:nil];
-  } @catch (NSException *exception) {
-    threw = YES;
-    XCTAssertEqualObjects(exception.description,
-                          @"You must specify |clientID| in |GIDConfiguration|");
-  } @finally {
-  }
-  XCTAssert(threw);
+
+  XCTAssertThrowsSpecificNamed(
+                               [_verifyAccountDetail verifyAccountDetails:_verifiableAccountDetails presentingViewController:_presentingViewController completion:nil],
+                               NSException,
+                               NSInvalidArgumentException,
+                               @"You must specify |clientID| in |GIDConfiguration|");
 }
 
 - (void)testSchemesNotSupportedException {
-  [_fakeMainBundle fakeMissingAllSchemes];
-  BOOL threw = NO;
-  @try {
-    [_verifyAccountDetail verifyAccountDetails:_verifiableAccountDetails
-                      presentingViewController:_presentingViewController
-                                    completion:nil];
-  } @catch (NSException *exception) {
-    threw = YES;
-    XCTAssertEqualObjects(exception.description,
-                          @"Your app is missing support for the following URL schemes: "
-                          "fakeclientid");
-  } @finally {
-  }
-  XCTAssert(threw);
+  XCTAssertThrowsSpecificNamed(
+                               [_verifyAccountDetail verifyAccountDetails:_verifiableAccountDetails presentingViewController:_presentingViewController completion:nil],
+                               NSException,
+                               NSInvalidArgumentException,
+                               @"Your app is missing support for the following URL schemes: "
+                               "fakeclientid");
 }
 
 @end