iOS Snapshot tests (#6081)

Add snapshot tests

package.json

     "test-js": "node ./scripts/test-js",
     "pod-install": "pod install --project-directory=playground/ios",
     "test-unit-ios": "node ./scripts/test-unit --ios",
+    "test-snapshot-ios": "node ./scripts/test-snapshot --ios",
     "test-unit-android": "node ./scripts/test-unit --android",
     "pretest-e2e-android": "npm run build",
     "test-e2e-android": "node ./scripts/test-e2e --android",

playground/ios/NavigationTests/RNNTestRootViewCreator.m

 @implementation RNNTestRootViewCreator
 
 - (RNNReactView *)createRootView:(NSString *)name rootViewId:(NSString *)rootViewId ofType:(RNNComponentType)componentType reactViewReadyBlock:(RNNReactViewReadyCompletionBlock)reactViewReadyBlock {
-	UIView *view = [[UIView alloc] init];
+	UIView *view = [[UIView alloc] initWithFrame:UIScreen.mainScreen.bounds];
+	UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 200)];
+	label.textAlignment = NSTextAlignmentCenter;
+	label.center = [view convertPoint:view.center fromView:view.superview];;
+	label.text = rootViewId;
+	[view addSubview:label];
 	view.tag = [rootViewId intValue];
+	view.backgroundColor = UIColor.redColor;
 	return view;
 }
 

playground/ios/Podfile

   pod 'OCMock'
 end
 
+target 'SnapshotTests' do
+  all_pods
+  pod 'OCMock'
+  use_frameworks!
+  pod 'iOSSnapshotTestCase/Core'
+end

playground/ios/Podfile.lock

     - DoubleConversion
     - glog
   - glog (0.3.5)
+  - iOSSnapshotTestCase/Core (6.2.0)
   - OCMock (3.5)
   - RCTRequired (0.61.5)
   - RCTTypeSafety (0.61.5):
     - ReactCommon/jscallinvoker (= 0.61.5)
   - ReactNativeKeyboardTrackingView (5.6.1):
     - React
-  - ReactNativeNavigation (6.0.1):
+  - ReactNativeNavigation (6.3.1):
     - React
     - React-RCTImage
     - React-RCTText
   - FBReactNativeSpec (from `../../node_modules/react-native/Libraries/FBReactNativeSpec`)
   - Folly (from `../../node_modules/react-native/third-party-podspecs/Folly.podspec`)
   - glog (from `../../node_modules/react-native/third-party-podspecs/glog.podspec`)
+  - iOSSnapshotTestCase/Core
   - OCMock
   - RCTRequired (from `../../node_modules/react-native/Libraries/RCTRequired`)
   - RCTTypeSafety (from `../../node_modules/react-native/Libraries/TypeSafety`)
 SPEC REPOS:
   trunk:
     - boost-for-react-native
+    - iOSSnapshotTestCase
     - OCMock
 
 EXTERNAL SOURCES:
   FBReactNativeSpec: 118d0d177724c2d67f08a59136eb29ef5943ec75
   Folly: 30e7936e1c45c08d884aa59369ed951a8e68cf51
   glog: 1f3da668190260b06b429bb211bfbee5cd790c28
+  iOSSnapshotTestCase: 9ab44cb5aa62b84d31847f40680112e15ec579a6
   OCMock: 4ab4577fc941af31f4a0398f6e7e230cf21fc72a
   RCTRequired: b153add4da6e7dbc44aebf93f3cf4fcae392ddf1
   RCTTypeSafety: 9aa1b91d7f9310fc6eadc3cf95126ffe818af320
   React-RCTVibration: a49a1f42bf8f5acf1c3e297097517c6b3af377ad
   ReactCommon: 198c7c8d3591f975e5431bec1b0b3b581aa1c5dd
   ReactNativeKeyboardTrackingView: a240a6a0dba852bb107109a7ec7e98b884055977
-  ReactNativeNavigation: 33657becf06c9c3a805ecb50dce8010fb887a1bb
+  ReactNativeNavigation: d9bb71088ef37aa6af58f3172f890a1ae08861d6
   Yoga: f2a7cd4280bfe2cca5a7aed98ba0eb3d1310f18b
 
-PODFILE CHECKSUM: 781f49751a12b13af3e83d5dfc4b122aa5770543
+PODFILE CHECKSUM: 480983e790dd4e9f99b1673fbb65606d9fe8ce71
 
-COCOAPODS: 1.8.4
+COCOAPODS: 1.9.1

playground/ios/playgroundTests/Info.plist → playground/ios/SnapshotTests/Info.plist

 	<key>CFBundleName</key>
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundlePackageType</key>
-	<string>BNDL</string>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
 	<key>CFBundleShortVersionString</key>
 	<string>1.0</string>
 	<key>CFBundleVersion</key>

playground/ios/SnapshotTests/StackOptionsTest.m

+#import <XCTest/XCTest.h>
+#import "LayoutCreator.h"
+#import "CommandsHandlerCreator.h"
+#import <FBSnapshotTestCase/FBSnapshotTestCase.h>
+
+@interface StackOptionsTest : FBSnapshotTestCase
+@property (nonatomic, strong) RNNCommandsHandler* commandsHandler;
+@property (nonatomic, strong) UIWindow* window;
+@end
+
+@implementation StackOptionsTest
+
+- (void)setUp {
+	[super setUp];
+	_window = [[[UIApplication sharedApplication] delegate] window];
+	_commandsHandler = [CommandsHandlerCreator createWithWindow:_window];
+	self.usesDrawViewHierarchyInRect = YES;
+	
+//	Uncomment next line to record new snapshots
+//	self.recordMode = YES;
+}
+
+- (void)tearDown {
+	[super tearDown];
+	_window.rootViewController = nil;
+}
+
+#define RNNStackFlow(NAME, FIRST, SECOND, ...)\
+[self setRoot:[LayoutCreator component:@"FirstComponent" options:FIRST] testName:@#NAME]; \
+[self push:[LayoutCreator component:@"SecondComponent" options:SECOND] testName:@#NAME]; \
+[self pop:@"SecondComponent" testName:@#NAME]; \
+
+
+- (void)testStack_topBar {
+	RNNStackFlow(opaque background, @{@"topBar": @{@"background": @{@"color": @(0xFFFF00FF)}}}, @{@"topBar": @{@"background": @{@"color": @(0xFFFF0000)}}});
+	RNNStackFlow(tansparent background, @{@"topBar": @{@"background": @{@"color": @(0x00FFFFFF)}}}, @{@"topBar": @{@"background": @{@"color": @(0xFFFF0000)}}});
+	RNNStackFlow(translucent background, @{@"topBar": @{@"background": @{@"translucent": @(1)}}}, @{@"topBar": @{@"background": @{@"translucent": @(0)}}});
+	RNNStackFlow(title change, @{@"topBar": @{@"title": @{@"text": @"First Component"}}}, @{@"topBar": @{@"title": @{@"text": @"Second Component"}}});
+	RNNStackFlow(visibility, @{@"topBar": @{@"visible": @(0)}}, @{@"topBar": @{@"visible": @(1)}});
+	RNNStackFlow(title font, @{@"topBar": @{@"title": @{@"text": @"First Component"}}}, (@{@"topBar": @{@"title": @{@"text": @"Second Component", @"fontFamily": @"Arial", @"color": @(0xFFFF00FF), @"fontSize": @(15)}}}));
+}
+
+- (void)setRoot:(NSDictionary *)firstComponent testName:(NSString *)testName {
+	NSDictionary* root = [LayoutCreator stack:@{} children:@[firstComponent]];
+	NSString* rootTestName = [NSString stringWithFormat:@"%@_root", testName];
+	[_commandsHandler setRoot:@{@"root": root}
+					commandId:@"SetRoot"
+				   completion:^{}];
+	FBSnapshotVerifyView(_window, rootTestName);
+}
+
+- (void)push:(NSDictionary *)secondComponent testName:(NSString *)testName {
+	NSString* pushTestName = [NSString stringWithFormat:@"%@_push", testName];
+	[_commandsHandler push:@"FirstComponent"
+				 commandId:@"push"
+					layout:secondComponent
+				completion:^{}
+				 rejection:^(NSString *code, NSString *message, NSError *error) {}];
+	FBSnapshotVerifyView(_window, pushTestName);
+}
+
+- (void)pop:(NSString *)componentId testName:(NSString *)testName {
+	NSString* popTestName = [NSString stringWithFormat:@"%@_pop", testName];
+	[_commandsHandler pop:componentId
+				commandId:@"pop"
+			 mergeOptions:@{}
+			   completion:^{}
+				rejection:^(NSString *code, NSString *message, NSError *error) {}];
+	FBSnapshotVerifyView(_window, popTestName);
+}
+
+
+@end

playground/ios/SnapshotTests/Utils/CommandsHandlerCreator.h

+#import <Foundation/Foundation.h>
+#import <ReactNativeNavigation/RNNCommandsHandler.h>
+
+@interface CommandsHandlerCreator : NSObject
+
++ (RNNCommandsHandler *)createWithWindow:(UIWindow *)window;
+
+@end

playground/ios/SnapshotTests/Utils/CommandsHandlerCreator.m

+#import "CommandsHandlerCreator.h"
+#import "RNNTestRootViewCreator.h"
+#import <ReactNativeNavigation/RNNEventEmitter.h>
+#import <ReactNativeNavigation/RNNOverlayManager.h>
+#import <ReactNativeNavigation/RNNModalManager.h>
+#import <ReactNativeNavigation/RNNControllerFactory.h>
+
+@implementation CommandsHandlerCreator
+
++ (RNNCommandsHandler *)createWithWindow:(UIWindow *)window {
+	RNNTestRootViewCreator* creator = [RNNTestRootViewCreator new];
+	RNNEventEmitter* eventEmmiter = [RNNEventEmitter new];
+	RNNOverlayManager* overlayManager = [RNNOverlayManager new];
+	RNNModalManager* modalManager = [RNNModalManager new];
+	RNNControllerFactory* controllerFactory = [[RNNControllerFactory alloc] initWithRootViewCreator:creator eventEmitter:eventEmmiter store:nil componentRegistry:nil andBridge:nil bottomTabsAttachModeFactory:[BottomTabsAttachModeFactory new]];
+	RNNCommandsHandler* commandsHandler = [[RNNCommandsHandler alloc] initWithControllerFactory:controllerFactory eventEmitter:eventEmmiter modalManager:modalManager overlayManager:overlayManager mainWindow:window];
+	[commandsHandler setReadyToReceiveCommands:YES];
+	[commandsHandler setDefaultOptions:@{
+		@"animations": @{
+				@"push": @{
+						@"enabled": @(0)
+				},
+				@"pop": @{
+						@"enabled": @(0)
+				}
+		},
+		@"topBar": @{
+				@"drawBehind": @(1)
+		},
+		@"layout": @{
+				@"componentBackgroundColor": @(0xFF00FF00)
+		}
+	} completion:^{}];
+	
+	return commandsHandler;
+}
+
+@end

playground/ios/SnapshotTests/Utils/LayoutCreator.h

+#import <Foundation/Foundation.h>
+
+@interface LayoutCreator : NSObject
+
++ (NSDictionary *)component:(NSString *)componentId options:(NSDictionary *)options;
+
++ (NSDictionary *)parentWithID:(NSString *)componentId type:(NSString *)type options:(NSDictionary *)options children:(NSArray<NSDictionary *> *)children;
+
++ (NSDictionary *)stack:(NSDictionary *)options children:(NSArray<NSDictionary *> *)children;
+
+@end

playground/ios/SnapshotTests/Utils/LayoutCreator.m

+#import "LayoutCreator.h"
+
+@implementation LayoutCreator
+
++ (NSDictionary *)component:(NSString *)componentId options:(NSDictionary *)options {
+	return @{
+		@"type": @"Component",
+		@"id": componentId,
+		@"data": @{
+				@"options": options
+		}
+	};
+}
+
++ (NSDictionary *)parentWithID:(NSString *)componentId type:(NSString *)type options:(NSDictionary *)options children:(NSArray<NSDictionary *> *)children {
+	return @{
+		@"type": type,
+		@"id": componentId,
+		@"data": @{
+				@"options": options
+		},
+		@"children": children
+	};
+}
+
++ (NSDictionary *)stack:(NSDictionary *)options children:(NSArray<NSDictionary *> *)children {
+	return @{
+		@"type": @"Stack",
+		@"id": @"StackID",
+		@"data": @{
+				@"options": options
+		},
+		@"children": children
+	};
+}
+
+@end

playground/ios/playground.xcodeproj/project.pbxproj

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 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
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+				5078DF37242BE8AA007B0B4F /* TestingAppDelegate.h */,
+				5078DF38242BE8AA007B0B4F /* TestingAppDelegate.m */,
 				13B07FB51A68108700A75B9A /* Images.xcassets */,
 				13B07FB61A68108700A75B9A /* Info.plist */,
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 			path = Pods;
 			sourceTree = "<group>";
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+			isa = PBXGroup;
+			children = (
+				507C80E9242BC6E200F765F7 /* Utils */,
+				50E4888A2427DA4800B11A8E /* StackOptionsTest.m */,
+				507C80DE2429111F00F765F7 /* Info.plist */,
+			);
+			path = SnapshotTests;
+			sourceTree = "<group>";
+		};
+		507C80E9242BC6E200F765F7 /* Utils */ = {
+			isa = PBXGroup;
+			children = (
+				507C80EA242BC6FB00F765F7 /* LayoutCreator.h */,
+				507C80EB242BC6FB00F765F7 /* LayoutCreator.m */,
+				50650A21242FB0F800688104 /* CommandsHandlerCreator.h */,
+				50650A22242FB0F800688104 /* CommandsHandlerCreator.m */,
+			);
+			path = Utils;
+			sourceTree = "<group>";
+		};
 		50996C5E23AA46DD00008F89 /* NavigationIOS12Tests */ = {
 			isa = PBXGroup;
 			children = (
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 				E58D261C238587F4003F36BA /* NavigationTests */,
 				50996C5E23AA46DD00008F89 /* NavigationIOS12Tests */,
+				507C80DB2429111F00F765F7 /* SnapshotTests */,
 				83CBBA001A601CBA00E9B192 /* Products */,
 				E504607E227748E900212BD8 /* Frameworks */,
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 				E58D261B238587F4003F36BA /* NavigationTests.xctest */,
 				50996C5D23AA46DD00008F89 /* NavigationIOS12Tests.xctest */,
+				507C80DA2429111F00F765F7 /* SnapshotTests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
 				4A3340545EAAF11C1F146864 /* Pods_playground.framework */,
 				84E32151E3A71C2B7328BCB4 /* Pods_NavigationTests.framework */,
 				DEE0B5D45FD34FBABC6586CF /* Pods_NavigationIOS12Tests.framework */,
+				FE0C1AD81D2043249E7FE924 /* Pods_SnapshotTests.framework */,
 			);
 			name = Frameworks;
 			sourceTree = "<group>";
 			productReference = 13B07F961A680F5B00A75B9A /* playground.app */;
 			productType = "com.apple.product-type.application";
 		};
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+			isa = PBXNativeTarget;
+			buildConfigurationList = 507C80E12429111F00F765F7 /* Build configuration list for PBXNativeTarget "SnapshotTests" */;
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+				507C80D62429111F00F765F7 /* Sources */,
+				507C80D72429111F00F765F7 /* Frameworks */,
+				507C80D82429111F00F765F7 /* Resources */,
+				1093A79180788A805F6D391C /* [CP] Embed Pods Frameworks */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				507C80E02429111F00F765F7 /* PBXTargetDependency */,
+			);
+			name = SnapshotTests;
+			productName = SnapshotTests;
+			productReference = 507C80DA2429111F00F765F7 /* SnapshotTests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
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 			isa = PBXNativeTarget;
 			buildConfigurationList = 50996C6623AA46DD00008F89 /* Build configuration list for PBXNativeTarget "NavigationIOS12Tests" */;
 						DevelopmentTeam = XPHGA2FMQQ;
 						ProvisioningStyle = Automatic;
 					};
+					507C80D92429111F00F765F7 = {
+						CreatedOnToolsVersion = 11.2.1;
+						ProvisioningStyle = Automatic;
+						TestTargetID = 13B07F861A680F5B00A75B9A;
+					};
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 						CreatedOnToolsVersion = 11.2.1;
 						ProvisioningStyle = Automatic;
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 				50996C5C23AA46DD00008F89 /* NavigationIOS12Tests */,
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 			);
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 /* End PBXProject section */
 			);
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 		};
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+			buildActionMask = 2147483647;
+			files = (
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 			buildActionMask = 2147483647;
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 			showEnvVarsInLog = 0;
 		};
+		1093A79180788A805F6D391C /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-SnapshotTests/Pods-SnapshotTests-frameworks.sh",
+				"${BUILT_PRODUCTS_DIR}/DoubleConversion/DoubleConversion.framework",
+				"${BUILT_PRODUCTS_DIR}/FBReactNativeSpec/FBReactNativeSpec.framework",
+				"${BUILT_PRODUCTS_DIR}/Folly/folly.framework",
+				"${BUILT_PRODUCTS_DIR}/RCTTypeSafety/RCTTypeSafety.framework",
+				"${BUILT_PRODUCTS_DIR}/React-Core/React.framework",
+				"${BUILT_PRODUCTS_DIR}/React-CoreModules/CoreModules.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTActionSheet/RCTActionSheet.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTAnimation/RCTAnimation.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTBlob/RCTBlob.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTImage/RCTImage.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTLinking/RCTLinking.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTNetwork/RCTNetwork.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTSettings/RCTSettings.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTText/RCTText.framework",
+				"${BUILT_PRODUCTS_DIR}/React-RCTVibration/RCTVibration.framework",
+				"${BUILT_PRODUCTS_DIR}/React-cxxreact/cxxreact.framework",
+				"${BUILT_PRODUCTS_DIR}/React-jsi/jsi.framework",
+				"${BUILT_PRODUCTS_DIR}/React-jsiexecutor/jsireact.framework",
+				"${BUILT_PRODUCTS_DIR}/React-jsinspector/jsinspector.framework",
+				"${BUILT_PRODUCTS_DIR}/ReactCommon/ReactCommon.framework",
+				"${BUILT_PRODUCTS_DIR}/ReactNativeKeyboardTrackingView/ReactNativeKeyboardTrackingView.framework",
+				"${BUILT_PRODUCTS_DIR}/ReactNativeNavigation/ReactNativeNavigation.framework",
+				"${BUILT_PRODUCTS_DIR}/Yoga/yoga.framework",
+				"${BUILT_PRODUCTS_DIR}/glog/glog.framework",
+				"${BUILT_PRODUCTS_DIR}/OCMock/OCMock.framework",
+				"${BUILT_PRODUCTS_DIR}/iOSSnapshotTestCase/FBSnapshotTestCase.framework",
+			);
+			name = "[CP] Embed Pods Frameworks";
+			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/DoubleConversion.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/FBReactNativeSpec.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/folly.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTTypeSafety.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/React.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/CoreModules.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTActionSheet.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTAnimation.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTBlob.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTImage.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTLinking.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTNetwork.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTSettings.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTText.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/RCTVibration.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/cxxreact.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/jsi.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/jsireact.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/jsinspector.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/ReactCommon.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/ReactNativeKeyboardTrackingView.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/ReactNativeNavigation.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/yoga.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/glog.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/OCMock.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/FBSnapshotTestCase.framework",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-SnapshotTests/Pods-SnapshotTests-frameworks.sh\"\n";
+			showEnvVarsInLog = 0;
+		};
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+			);
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+				"${PODS_ROOT}/Manifest.lock",
+			);
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+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-SnapshotTests-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
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+				5078DF39242BE8AA007B0B4F /* TestingAppDelegate.m in Sources */,
 				13B07FBC1A68108700A75B9A /* AppDelegate.m in Sources */,
 				13B07FC11A68108700A75B9A /* main.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		507C80D62429111F00F765F7 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				507C80E8242A1E6F00F765F7 /* AppDelegate.m in Sources */,
+				507C80EC242BC6FB00F765F7 /* LayoutCreator.m in Sources */,
+				507C80E7242914C800F765F7 /* StackOptionsTest.m in Sources */,
+				507C80E5242912AD00F765F7 /* RNNTestRootViewCreator.m in Sources */,
+				50650A23242FB0F800688104 /* CommandsHandlerCreator.m in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		50996C5923AA46DD00008F89 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
+		507C80E02429111F00F765F7 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = 13B07F861A680F5B00A75B9A /* playground */;
+			targetProxy = 507C80DF2429111F00F765F7 /* PBXContainerItemProxy */;
+		};
 		50996C6323AA46DD00008F89 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = 13B07F861A680F5B00A75B9A /* playground */;
 			};
 			name = Release;
 		};
+		507C80E22429111F00F765F7 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 4C14E49C47AA48BEDE90A218 /* Pods-SnapshotTests.debug.xcconfig */;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CODE_SIGN_STYLE = Automatic;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				INFOPLIST_FILE = SnapshotTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 13.2;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
+				MTL_FAST_MATH = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = rn.SnapshotTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/playground.app/playground";
+			};
+			name = Debug;
+		};
+		507C80E32429111F00F765F7 /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = DC6478E8C795582800285530 /* Pods-SnapshotTests.release.xcconfig */;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CODE_SIGN_STYLE = Automatic;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				INFOPLIST_FILE = SnapshotTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 13.2;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				MTL_FAST_MATH = YES;
+				PRODUCT_BUNDLE_IDENTIFIER = rn.SnapshotTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/playground.app/playground";
+			};
+			name = Release;
+		};
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 			baseConfigurationReference = C9E7FB91365E7BEF959ADB5F /* Pods-NavigationIOS12Tests.debug.xcconfig */;
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Debug;
 		};
+		507C80E12429111F00F765F7 /* Build configuration list for PBXNativeTarget "SnapshotTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				507C80E22429111F00F765F7 /* Debug */,
+				507C80E32429111F00F765F7 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Debug;
+		};
 		50996C6623AA46DD00008F89 /* Build configuration list for PBXNativeTarget "NavigationIOS12Tests" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (

playground/ios/playground.xcodeproj/xcshareddata/xcschemes/SnapshotTests.xcscheme

+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1120"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "NO">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "507C80D92429111F00F765F7"
+            BuildableName = "SnapshotTests.xctest"
+            BlueprintName = "SnapshotTests"
+            ReferencedContainer = "container:playground.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <EnvironmentVariables>
+         <EnvironmentVariable
+            key = "FB_REFERENCE_IMAGE_DIR"
+            value = "$(SOURCE_ROOT)/SnapshotTests/ReferenceImages"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+         <EnvironmentVariable
+            key = "TEST_ENABLED"
+            value = "YES"
+            isEnabled = "YES">
+         </EnvironmentVariable>
+      </EnvironmentVariables>
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "507C80D92429111F00F765F7"
+               BuildableName = "SnapshotTests.xctest"
+               BlueprintName = "SnapshotTests"
+               ReferencedContainer = "container:playground.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "13B07F861A680F5B00A75B9A"
+            BuildableName = "playground.app"
+            BlueprintName = "playground"
+            ReferencedContainer = "container:playground.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "13B07F861A680F5B00A75B9A"
+            BuildableName = "playground.app"
+            BlueprintName = "playground"
+            ReferencedContainer = "container:playground.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

playground/ios/playground/TestingAppDelegate.h

+#import <UIKit/UIKit.h>
+
+@interface TestingAppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (nonatomic, strong) UIWindow *window;
+
+@end

playground/ios/playground/TestingAppDelegate.m

+#import "TestingAppDelegate.h"
+
+@implementation TestingAppDelegate
+
+- (void)applicationDidFinishLaunching:(UIApplication *)application {
+	_window = [UIWindow new];
+	_window.rootViewController = [UIViewController new];
+	[_window makeKeyAndVisible];
+}
+
+@end

playground/ios/playground/main.m

 #import <UIKit/UIKit.h>
 
 #import "AppDelegate.h"
+#import "TestingAppDelegate.h"
 
 static bool isRunningTests()
 {
 int main(int argc, char * argv[]) {
 	@autoreleasepool {
 		if (isRunningTests()) {
-			return UIApplicationMain(argc, argv, nil, nil);
+			return UIApplicationMain(argc, argv, nil, NSStringFromClass([TestingAppDelegate class]));
 		} else {
 			return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
 		}

playground/ios/playgroundTests/playgroundTests.m

-//
-//  playgroundTests.m
-//  playgroundTests
-//
-//  Created by Yogev Ben David on 30/04/2018.
-//  Copyright © 2018 Wix. All rights reserved.
-//
-
-#import <XCTest/XCTest.h>
-
-@interface playgroundTests : XCTestCase
-
-@end
-
-@implementation playgroundTests
-
-- (void)setUp {
-    [super setUp];
-    // Put setup code here. This method is called before the invocation of each test method in the class.
-}
-
-- (void)tearDown {
-    // Put teardown code here. This method is called after the invocation of each test method in the class.
-    [super tearDown];
-}
-
-- (void)testExample {
-    // This is an example of a functional test case.
-    // Use XCTAssert and related functions to verify your tests produce the correct results.
-}
-
-- (void)testPerformanceExample {
-    // This is an example of a performance test case.
-    [self measureBlock:^{
-        // Put the code you want to measure the time of here.
-    }];
-}
-
-@end

scripts/test-all.js

   exec.execSync(`npm run clean`);
   exec.execSync(`npm run test-js`);
   exec.execAsyncSilent(`npm run start`);
-  await exec.execAsyncAll(`npm run test-unit-android`, `npm run test-unit-ios`);
+  await exec.execAsyncAll(`npm run test-unit-android`, `npm run test-unit-ios`, `npm run test-snapshot-ios`);
   await exec.execAsyncAll(`npm run test-e2e-android`, `npm run test-e2e-ios`);
   exec.execSync(`npm run clean`);
   console.log('ALL PASSED!!!');

scripts/test-snapshot.js

+const includes = require('lodash/includes');
+const exec = require('shell-utils').exec;
+
+const android = includes(process.argv, '--android');
+const release = includes(process.argv, '--release');
+
+function run() {
+  if (android) {
+    runAndroidSnapshotTests();
+  } else {
+    runIosSnapshotTests();
+  }
+}
+
+function runAndroidSnapshotTests() {
+
+}
+
+function runIosSnapshotTests() {
+  exec.execSync('npm run build');
+  exec.execSync('npm run pod-install');
+  testTarget('SnapshotTests', 'iPhone 11');
+}
+
+function testTarget(scheme, device, OS = 'latest') {
+  const conf = release ? `Release` : `Debug`;
+  exec.execSync(`cd ./playground/ios &&
+  RCT_NO_LAUNCH_PACKAGER=true
+  xcodebuild build build-for-testing
+  -scheme "${scheme}"
+  -workspace playground.xcworkspace
+  -sdk iphonesimulator
+  -configuration ${conf}
+  -derivedDataPath ./DerivedData/playground
+  -quiet
+  -UseModernBuildSystem=NO
+  ONLY_ACTIVE_ARCH=YES`);
+
+  exec.execSync(`cd ./playground/ios &&
+  RCT_NO_LAUNCH_PACKAGER=true
+  xcodebuild test-without-building
+  -scheme "${scheme}"
+  -workspace playground.xcworkspace
+  -sdk iphonesimulator
+  -configuration ${conf}
+  -destination 'platform=iOS Simulator,name=${device},OS=${OS}'
+  -derivedDataPath ./DerivedData/playground
+  ONLY_ACTIVE_ARCH=YES`);
+}
+
+run();