Add fake safari view controller and use it in payment provider tests.

- add initializer to payment provider to inject fake safari controller

Mobile Buy SDK/Mobile Buy SDK Tests/BUYFakeSafariController.h

+//
+//  BUYFakeSafariController.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#import <SafariServices/SafariServices.h>
+
+@interface BUYFakeSafariController : SFSafariViewController
+
+@end

Mobile Buy SDK/Mobile Buy SDK Tests/BUYFakeSafariController.m

+//
+//  BUYFakeSafariController.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#import "BUYFakeSafariController.h"
+
+#pragma mark - Delegator -
+
+@interface BUYFakeDelegator : NSObject
+
+@property (weak, nonatomic) id delegate;
+
+@end
+
+@implementation BUYFakeDelegator
+
+@end
+
+#pragma mark - Fake Controller -
+
+@interface BUYFakeSafariController ()
+
+@end
+
+@implementation BUYFakeSafariController
+
+- (instancetype)initWithURL:(NSURL *)URL {
+	return [self initWithURL:URL entersReaderIfAvailable:YES];
+}
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wobjc-designated-initializers"
+- (instancetype)initWithURL:(NSURL *)URL entersReaderIfAvailable:(BOOL)entersReaderIfAvailable {
+	return (id)[[BUYFakeDelegator alloc] init];
+}
+#pragma clang diagnostic pop
+
+@end

Mobile Buy SDK/Mobile Buy SDK Tests/BUYPaymentProviderTests.m

@@ -14,12 +14,17 @@
 #import "BUYWebCheckoutPaymentProvider.h"
 #import "BUYClientTestBase.h"
 #import "BUYPaymentController.h"
+#import "BUYFakeSafariController.h"
 #import <OHHTTPStubs/OHHTTPStubs.h>
 
-@interface BUYPaymentController ()
+@interface BUYPaymentController (Private)
 - (id <BUYPaymentProvider>)providerForType:(NSString *)type;
 @end
 
+@interface BUYWebCheckoutPaymentProvider (Private)
+- (instancetype)initWithClient:(BUYClient *)client webClass:(Class)webClass;
+@end
+
 @interface BUYPaymentProviderTests : XCTestCase <BUYPaymentProviderDelegate>
 
 @property (nonatomic) NSMutableDictionary <NSString *, XCTestExpectation *> *expectations;
@@ -157,7 +162,7 @@
 {
 	[self mockRequests];
 	
-	BUYWebCheckoutPaymentProvider *webProvider = [[BUYWebCheckoutPaymentProvider alloc] initWithClient:self.client];
+	BUYWebCheckoutPaymentProvider *webProvider = [[BUYWebCheckoutPaymentProvider alloc] initWithClient:self.client webClass:[BUYFakeSafariController class]];
 	webProvider.delegate = self;
 	
 	self.expectations[@"presentController"] = [self expectationWithDescription:NSStringFromSelector(_cmd)];

Mobile Buy SDK/Mobile Buy SDK.xcodeproj/project.pbxproj

@@ -379,6 +379,7 @@
 		B2653EC51CEF55CC0012D57D /* BUYModelManager+ApplePay.m in Sources */ = {isa = PBXBuildFile; fileRef = B2653EC21CEF55CC0012D57D /* BUYModelManager+ApplePay.m */; };
 		B2653EC61CEF55CC0012D57D /* BUYModelManager+ApplePay.m in Sources */ = {isa = PBXBuildFile; fileRef = B2653EC21CEF55CC0012D57D /* BUYModelManager+ApplePay.m */; };
 		B2653EC71CEF55CC0012D57D /* BUYModelManager+ApplePay.m in Sources */ = {isa = PBXBuildFile; fileRef = B2653EC21CEF55CC0012D57D /* BUYModelManager+ApplePay.m */; };
+		9ABBCCA11CF5C9D10075B0C5 /* BUYFakeSafariController.m in Sources */ = {isa = PBXBuildFile; fileRef = 9ABBCCA01CF5C9D10075B0C5 /* BUYFakeSafariController.m */; };
 		BE47340F1B66C4EF00AA721A /* BUYError.h in Headers */ = {isa = PBXBuildFile; fileRef = BE47340D1B66C4EF00AA721A /* BUYError.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		BE4734101B66C4EF00AA721A /* BUYError.m in Sources */ = {isa = PBXBuildFile; fileRef = BE47340E1B66C4EF00AA721A /* BUYError.m */; };
 		BE5DC3631B71022D00B2BC1E /* BUYMaskedCreditCard.h in Headers */ = {isa = PBXBuildFile; fileRef = BE5DC3611B71022D00B2BC1E /* BUYMaskedCreditCard.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -659,6 +660,10 @@
 		B2653EC21CEF55CC0012D57D /* BUYModelManager+ApplePay.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "BUYModelManager+ApplePay.m"; sourceTree = "<group>"; };
 		BE33B4ED1B15FF4D0067982B /* BUYApplePayAuthorizationDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYApplePayAuthorizationDelegate.h; sourceTree = "<group>"; };
 		BE33B4EE1B15FF4D0067982B /* BUYApplePayAuthorizationDelegate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYApplePayAuthorizationDelegate.m; sourceTree = "<group>"; };
+		9ABBCC9F1CF5C9D10075B0C5 /* BUYFakeSafariController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYFakeSafariController.h; sourceTree = "<group>"; };
+		9ABBCCA01CF5C9D10075B0C5 /* BUYFakeSafariController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYFakeSafariController.m; sourceTree = "<group>"; };
+		BE33B4ED1B15FF4D0067982B /* BUYApplePayHelpers.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYApplePayHelpers.h; sourceTree = "<group>"; };
+		BE33B4EE1B15FF4D0067982B /* BUYApplePayHelpers.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYApplePayHelpers.m; sourceTree = "<group>"; };
 		BE47340D1B66C4EF00AA721A /* BUYError.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYError.h; sourceTree = "<group>"; };
 		BE47340E1B66C4EF00AA721A /* BUYError.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYError.m; sourceTree = "<group>"; };
 		BE5DC3611B71022D00B2BC1E /* BUYMaskedCreditCard.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYMaskedCreditCard.h; sourceTree = "<group>"; };
@@ -1019,6 +1024,8 @@
 			children = (
 				9A47CF1E1CE50EBB00A6D5BA /* BUYApplePayTestToken.h */,
 				9A47CF1F1CE50EBB00A6D5BA /* BUYApplePayTestToken.m */,
+				9ABBCC9F1CF5C9D10075B0C5 /* BUYFakeSafariController.h */,
+				9ABBCCA01CF5C9D10075B0C5 /* BUYFakeSafariController.m */,
 			);
 			name = "Test Objects";
 			sourceTree = "<group>";
@@ -1643,6 +1650,7 @@
 				8498DCCC1CDD208200BD12A8 /* BUYCustomerTests.m in Sources */,
 				B2653EC51CEF55CC0012D57D /* BUYModelManager+ApplePay.m in Sources */,
 				8498DCCE1CDD208200BD12A8 /* BUYOrderTests.m in Sources */,
+				9ABBCCA11CF5C9D10075B0C5 /* BUYFakeSafariController.m in Sources */,
 				9A0B0C831CEB981C0037D68F /* BUYClient+RoutingTests.m in Sources */,
 				849110351CCE70CE00E53B93 /* BUYDictionaryAdditionsTests.m in Sources */,
 				90F5930A1B0D5F4C0026B382 /* BUYLineItemTest.m in Sources */,

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYWebCheckoutPaymentProvider.h

@@ -42,7 +42,7 @@ extern NSString * const BUYWebPaymentProviderId;
  *
  *  @return an instance of `BUYWebCheckoutPaymentProvider`
  */
-- (instancetype)initWithClient:(BUYClient *)client NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithClient:(BUYClient *)client;
 - (instancetype)init NS_UNAVAILABLE;
 
 @end

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYWebCheckoutPaymentProvider.m

@@ -27,6 +27,7 @@
 #import "BUYWebCheckoutPaymentProvider.h"
 #import "BUYCheckout.h"
 #import "BUYClient+CheckoutHelpers.h"
+#import "BUYAssert.h"
 
 @import SafariServices;
 
@@ -37,32 +38,58 @@ NSString * const BUYWebPaymentProviderId = @"BUYWebPaymentProviderId";
 static NSString *const WebCheckoutCustomerAccessToken = @"customer_access_token";
 
 @interface BUYWebCheckoutPaymentProvider () <SFSafariViewControllerDelegate>
+
 @property (nonatomic, strong) BUYCheckout *checkout;
 @property (nonatomic, strong) BUYClient *client;
+@property (nonatomic, strong) Class webClass;
+
+- (instancetype)initWithClient:(BUYClient *)client webClass:(Class)webClass NS_DESIGNATED_INITIALIZER;
+
 @end
 
 @implementation BUYWebCheckoutPaymentProvider
 
 @synthesize delegate;
 
+#pragma mark - Init -
+
 - (instancetype)initWithClient:(BUYClient *)client
 {
-	NSParameterAssert(client);
+	return [self initWithClient:client webClass:[SFSafariViewController class]];
+}
+
+- (instancetype)initWithClient:(BUYClient *)client webClass:(Class)webClass
+{
+	BUYAssert(client, @"Failed to initialize BUYWebCheckoutPaymentProvider, client must not be nil.");
+	BUYAssert([webClass isSubclassOfClass:[SFSafariViewController class]], @"Failed to initialize BUYWebCheckoutPaymentProvider, webClass must not be nil and be a subclass of SFSafariViewController.");
 	
 	self = [super init];
-	
 	if (self) {
-		_client = client;
+		_client   = client;
+		_webClass = webClass;
 	}
-	
 	return self;
 }
 
+#pragma mark - Accessors -
+
+- (BOOL)isAvailable
+{
+	return YES;
+}
+
 - (BOOL)isInProgress
 {
 	return (self.checkout != nil);
 }
 
+- (NSString *)identifier
+{
+	return BUYWebPaymentProviderId;
+}
+
+#pragma mark - Equality -
+
 - (NSUInteger)hash
 {
 	return self.identifier.hash;
@@ -73,10 +100,7 @@ static NSString *const WebCheckoutCustomerAccessToken = @"customer_access_token"
 	return ([object isKindOfClass:[self class]] && [self.identifier isEqual:[object identifier]]);
 }
 
-- (NSString *)identifier
-{
-	return BUYWebPaymentProviderId;
-}
+#pragma mark - Checkout -
 
 - (void)startCheckout:(BUYCheckout *)checkout
 {	
@@ -108,11 +132,6 @@ static NSString *const WebCheckoutCustomerAccessToken = @"customer_access_token"
 	self.checkout = nil;
 }
 
-- (BOOL)isAvailable
-{
-	return YES;
-}
-
 - (void)postCheckoutCompletion:(BUYCheckout *)checkout error:(NSError *)error
 {
 	if (self.checkout && error == nil) {
@@ -140,9 +159,9 @@ static NSString *const WebCheckoutCustomerAccessToken = @"customer_access_token"
 - (void)openWebCheckout:(BUYCheckout *)checkout
 {
 	NSURL *checkoutURL = [self authenticatedWebCheckoutURL:checkout.webCheckoutURL];
-	if ([SFSafariViewController class]) {
+	if (self.webClass) {
 		
-		SFSafariViewController *safariViewController = [[SFSafariViewController alloc] initWithURL:checkoutURL];
+		SFSafariViewController *safariViewController = [[self.webClass alloc] initWithURL:checkoutURL];
 		safariViewController.delegate = self;
 		[self.delegate paymentProvider:self wantsControllerPresented:safariViewController];
 	}
@@ -163,7 +182,7 @@ static NSString *const WebCheckoutCustomerAccessToken = @"customer_access_token"
 	return authenticatedComponents.URL;
 }
 
-#pragma mark - Web Checkout delegate methods
+#pragma mark - Web Checkout Delegate Methods -
 
 - (void)safariViewControllerDidFinish:(SFSafariViewController *)controller;
 {