Add end to end integration tests with RC+ABT (#5636)

* Add ABT integration testing app

* Fix formatting

* Run scripts/style.sh

* Fix Podfile to pull in dev versions of ABT, Remote config, and Core

* Fake values in GoogleService-Info.plist

FirebaseABTesting/Tests/Integration/ABTQA.xcodeproj/project.pbxproj

@@ -0,0 +1,643 @@
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+				255D24B2243E32BE00198B35 /* Info.plist */,
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+			path = ABTQA;
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+			);
+			name = ABTQA;
+			productName = ABTQA;
+			productReference = 255D24A1243E32BB00198B35 /* ABTQA.app */;
+			productType = "com.apple.product-type.application";
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+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 13.4;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				MTL_FAST_MATH = YES;
+				SDKROOT = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		255D24CC243E32BE00198B35 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9F7FA3676E99EC590CEEAC0F /* Pods-ABTQA.debug.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 965RJH2QM8;
+				INFOPLIST_FILE = ABTQA/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				MARKETING_VERSION = 0.1;
+				PRODUCT_BUNDLE_IDENTIFIER = com.firebase.ABTQA;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Debug;
+		};
+		255D24CD243E32BE00198B35 /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = C102C1701D9907088D93DB4D /* Pods-ABTQA.release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 965RJH2QM8;
+				INFOPLIST_FILE = ABTQA/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				MARKETING_VERSION = 0.1;
+				PRODUCT_BUNDLE_IDENTIFIER = com.firebase.ABTQA;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Release;
+		};
+		255D24CF243E32BE00198B35 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 965RJH2QM8;
+				INFOPLIST_FILE = ABTQATests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 13.4;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.firebase.ABTQATests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/ABTQA.app/ABTQA";
+			};
+			name = Debug;
+		};
+		255D24D0243E32BE00198B35 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 965RJH2QM8;
+				INFOPLIST_FILE = ABTQATests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 13.4;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.firebase.ABTQATests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/ABTQA.app/ABTQA";
+			};
+			name = Release;
+		};
+		255D24D2243E32BE00198B35 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 965RJH2QM8;
+				INFOPLIST_FILE = ABTQAUITests/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.firebase.ABTQAUITests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_TARGET_NAME = ABTQA;
+			};
+			name = Debug;
+		};
+		255D24D3243E32BE00198B35 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 965RJH2QM8;
+				INFOPLIST_FILE = ABTQAUITests/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.firebase.ABTQAUITests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_TARGET_NAME = ABTQA;
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		255D249C243E32BB00198B35 /* Build configuration list for PBXProject "ABTQA" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				255D24C9243E32BE00198B35 /* Debug */,
+				255D24CA243E32BE00198B35 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		255D24CB243E32BE00198B35 /* Build configuration list for PBXNativeTarget "ABTQA" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				255D24CC243E32BE00198B35 /* Debug */,
+				255D24CD243E32BE00198B35 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		255D24CE243E32BE00198B35 /* Build configuration list for PBXNativeTarget "ABTQATests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				255D24CF243E32BE00198B35 /* Debug */,
+				255D24D0243E32BE00198B35 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		255D24D1243E32BE00198B35 /* Build configuration list for PBXNativeTarget "ABTQAUITests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				255D24D2243E32BE00198B35 /* Debug */,
+				255D24D3243E32BE00198B35 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 255D2499243E32BB00198B35 /* Project object */;
+}

FirebaseABTesting/Tests/Integration/ABTQA.xcodeproj/xcshareddata/xcschemes/ABTQA.xcscheme

@@ -0,0 +1,104 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1140"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "255D24A0243E32BB00198B35"
+               BuildableName = "ABTQA.app"
+               BlueprintName = "ABTQA"
+               ReferencedContainer = "container:ABTQA.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "255D24B6243E32BE00198B35"
+               BuildableName = "ABTQATests.xctest"
+               BlueprintName = "ABTQATests"
+               ReferencedContainer = "container:ABTQA.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "255D24C1243E32BE00198B35"
+               BuildableName = "ABTQAUITests.xctest"
+               BlueprintName = "ABTQAUITests"
+               ReferencedContainer = "container:ABTQA.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 = "255D24A0243E32BB00198B35"
+            BuildableName = "ABTQA.app"
+            BlueprintName = "ABTQA"
+            ReferencedContainer = "container:ABTQA.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <CommandLineArguments>
+         <CommandLineArgument
+            argument = "-FIRDebugEnabled"
+            isEnabled = "YES">
+         </CommandLineArgument>
+      </CommandLineArguments>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "255D24A0243E32BB00198B35"
+            BuildableName = "ABTQA.app"
+            BlueprintName = "ABTQA"
+            ReferencedContainer = "container:ABTQA.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

FirebaseABTesting/Tests/Integration/ABTQA/AppDelegate.swift

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2020 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 UIKit
+import Firebase
+
+@UIApplicationMain
+class AppDelegate: UIResponder, UIApplicationDelegate {
+  func application(_ application: UIApplication,
+                   didFinishLaunchingWithOptions
+                   launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+    // Override point for customization after application launch.
+    FirebaseApp.configure()
+    return true
+  }
+
+  func application(_ application: UIApplication,
+                   configurationForConnecting connectingSceneSession: UISceneSession,
+                   options: UIScene.ConnectionOptions) -> UISceneConfiguration {
+    return UISceneConfiguration(name: "Default Configuration",
+                                sessionRole: connectingSceneSession.role)
+  }
+}

FirebaseABTesting/Tests/Integration/ABTQA/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,98 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "83.5x83.5"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "scale" : "1x",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

FirebaseABTesting/Tests/Integration/ABTQA/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

FirebaseABTesting/Tests/Integration/ABTQA/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+</document>

FirebaseABTesting/Tests/Integration/ABTQA/Base.lproj/Main.storyboard

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="16096" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+    <device id="retina6_1" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="16086"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="ABTQA" customModuleProvider="target" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="leJ-st-KAV">
+                                <rect key="frame" x="22" y="174" width="370" height="130.5"/>
+                                <string key="text">This will make a call to fetch the latest values from Remote Config. This project has a running A/B test with a parameter `bg_color`. Based on the result, the background color of the screen with either turn red or green based on variant assignment.</string>
+                                <fontDescription key="fontDescription" style="UICTFontTextStyleHeadline"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="KLS-Wd-htS">
+                                <rect key="frame" x="62.5" y="124" width="289" height="42"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="25"/>
+                                <state key="normal" title="Fetch remote config values"/>
+                                <connections>
+                                    <action selector="checkTestButtonTapped:" destination="BYZ-38-t0r" eventType="touchUpInside" id="tbq-Rk-knJ"/>
+                                </connections>
+                            </button>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="PD9-Py-SZW">
+                                <rect key="frame" x="52" y="427" width="310" height="42"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="25"/>
+                                <state key="normal" title="Fire a custom analytics event"/>
+                                <connections>
+                                    <action selector="fireAnalyticsEventButtonTapped:" destination="BYZ-38-t0r" eventType="touchUpInside" id="kgU-vo-FSg"/>
+                                </connections>
+                            </button>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="This opens a text field where you can enter the name of a custom analytics event, which will then be fired." textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="XJp-Bw-Rfp">
+                                <rect key="frame" x="20" y="477" width="374" height="64.5"/>
+                                <fontDescription key="fontDescription" style="UICTFontTextStyleHeadline"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                        </subviews>
+                        <color key="backgroundColor" systemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <constraints>
+                            <constraint firstItem="XJp-Bw-Rfp" firstAttribute="top" secondItem="PD9-Py-SZW" secondAttribute="bottom" constant="8" id="GGg-up-bp6"/>
+                            <constraint firstItem="PD9-Py-SZW" firstAttribute="centerY" secondItem="8bC-Xf-vdC" secondAttribute="centerY" id="Hlb-Oc-fRL"/>
+                            <constraint firstItem="KLS-Wd-htS" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="IYs-Wo-iR7"/>
+                            <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="leJ-st-KAV" secondAttribute="trailing" constant="20" id="Ji6-Oq-YP4"/>
+                            <constraint firstItem="PD9-Py-SZW" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="MMF-eJ-aK8"/>
+                            <constraint firstItem="XJp-Bw-Rfp" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="OVz-W2-lIw"/>
+                            <constraint firstItem="leJ-st-KAV" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="20" id="PpX-Ah-EAp"/>
+                            <constraint firstItem="XJp-Bw-Rfp" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="20" id="YYV-YD-dRt"/>
+                            <constraint firstItem="leJ-st-KAV" firstAttribute="top" secondItem="KLS-Wd-htS" secondAttribute="bottom" constant="8" id="ghI-kV-JTk"/>
+                            <constraint firstItem="leJ-st-KAV" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="mDt-we-Cds"/>
+                            <constraint firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="XJp-Bw-Rfp" secondAttribute="trailing" constant="20" id="ndW-B7-DAa"/>
+                            <constraint firstItem="KLS-Wd-htS" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" constant="80" id="rE4-d6-WYc"/>
+                        </constraints>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="139" y="118"/>
+        </scene>
+    </scenes>
+</document>

FirebaseABTesting/Tests/Integration/ABTQA/GoogleService-Info.plist

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CLIENT_ID</key>
+	<string>correct_client_id</string>
+	<key>REVERSED_CLIENT_ID</key>
+	<string>correct_reversed_client_id</string>
+	<key>API_KEY</key>
+	<string>correct_api_key</string>
+	<key>GCM_SENDER_ID</key>
+	<string>correct_gcm_sender_id</string>
+	<key>PLIST_VERSION</key>
+	<string>1</string>
+	<key>BUNDLE_ID</key>
+	<string>com.firebase.ABTQA</string>
+	<key>PROJECT_ID</key>
+	<string>abt-qa</string>
+	<key>STORAGE_BUCKET</key>
+	<string>project-id-123.storage.firebase.com</string>
+	<key>IS_ADS_ENABLED</key>
+	<false></false>
+	<key>IS_ANALYTICS_ENABLED</key>
+	<false></false>
+	<key>IS_APPINVITE_ENABLED</key>
+	<true></true>
+	<key>IS_GCM_ENABLED</key>
+	<true></true>
+	<key>IS_SIGNIN_ENABLED</key>
+	<true></true>
+	<key>GOOGLE_APP_ID</key>
+	<string>1:123:ios:123abc</string>
+	<key>DATABASE_URL</key>
+	<string>https://abc-xyz-123.firebaseio.com</string>
+</dict>
+</plist>

FirebaseABTesting/Tests/Integration/ABTQA/Info.plist

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(MARKETING_VERSION)</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+		<key>UISceneConfigurations</key>
+		<dict>
+			<key>UIWindowSceneSessionRoleApplication</key>
+			<array>
+				<dict>
+					<key>UISceneConfigurationName</key>
+					<string>Default Configuration</string>
+					<key>UISceneDelegateClassName</key>
+					<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
+					<key>UISceneStoryboardFile</key>
+					<string>Main</string>
+				</dict>
+			</array>
+		</dict>
+	</dict>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

FirebaseABTesting/Tests/Integration/ABTQA/SceneDelegate.swift

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2020 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 UIKit
+
+class SceneDelegate: UIResponder, UIWindowSceneDelegate {
+  var window: UIWindow?
+
+  func scene(_ scene: UIScene,
+             willConnectTo session: UISceneSession,
+             options connectionOptions: UIScene.ConnectionOptions) {
+    guard let _ = (scene as? UIWindowScene) else { return }
+  }
+}

FirebaseABTesting/Tests/Integration/ABTQA/ViewController.swift

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2020 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 UIKit
+import FirebaseAnalytics
+import FirebaseRemoteConfig
+
+class ViewController: UIViewController {
+  @IBAction func fireAnalyticsEventButtonTapped(_ sender: Any) {
+    let alert = UIAlertController(title: "Fire custom analytics event",
+                                  message: "Enter the name of a custom event",
+                                  preferredStyle: .alert)
+
+    alert.addAction(UIAlertAction(title: "Dismiss", style: .cancel, handler: { action in
+      alert.dismiss(animated: true, completion: nil)
+    }))
+
+    // Fire Analytics event based on text field content.
+    alert.addAction(UIAlertAction(title: "Fire event", style: .default, handler: { action in
+      guard let textField = alert.textFields?.first else {
+        assertionFailure("Alert has no text field. Something went wrong.")
+        return
+      }
+
+      if let event = textField.text {
+        Analytics.logEvent(event, parameters: nil)
+      }
+    }))
+
+    alert.addTextField { textField in
+      textField.placeholder = "e.g.: tapped_close_button"
+    }
+
+    present(alert, animated: true, completion: nil)
+  }
+
+  @IBAction func checkTestButtonTapped(_ sender: Any) {
+    let remoteConfig = RemoteConfig.remoteConfig()
+
+    remoteConfig.fetchAndActivate { status, error in
+      // Fetch `bg_color` from remote config after activating.
+      guard let color = remoteConfig.configValue(forKey: "bg_color").stringValue else {
+        assertionFailure("Failed to fetch `bg_color` config value. Check the ABT console.")
+        return
+      }
+
+      // Set background color.
+      DispatchQueue.main.async {
+        // The AB test has two values for `bg_color`: "green or "red".
+        if color == "green" {
+          self.view.backgroundColor = UIColor.green
+        } else {
+          self.view.backgroundColor = UIColor.red
+        }
+      }
+    }
+  }
+}

FirebaseABTesting/Tests/Integration/Podfile

@@ -0,0 +1,8 @@
+target 'ABTQA' do
+  use_frameworks!
+
+  pod 'Firebase/Analytics'
+  pod 'FirebaseCore', :path => '../../..'
+  pod 'FirebaseRemoteConfig', :path => '../../..'
+  pod 'FirebaseABTesting', :path => '../../..'
+end