Switch out DISABLE_YELLOW_BOX for IS_TESTING

Summary: Switch to using IS_TESTING on the Platform module. While IS_TESTING has to be explicitly set in the test harness, this makes it more usable and stops people from relying on brittle variables in the (larger) environment.

Reviewed By: fkgozali

Differential Revision: D4423661

fbshipit-source-id: 27a80867778b9374bcba67b69f9c93d32c0a74b0

Libraries/ReactNative/YellowBox.js

@@ -70,8 +70,7 @@ if (__DEV__) {
     updateWarningMap.apply(null, arguments);
   };
 
-  const ProcessInfo = require('NativeModules').ProcessInfo;
-  if (ProcessInfo && ProcessInfo.environment.DISABLE_YELLOW_BOX) {
+  if (Platform.isTesting) {
     (console: any).disableYellowBox = true;
   }
 }

Libraries/Utilities/Platform.ios.js

@@ -22,6 +22,10 @@ const Platform = {
     const constants = require('NativeModules').IOSConstants;
     return constants ? (constants.interfaceIdiom === 'tv') : false;
   },
+  get isTesting(): boolean {
+    const constants = require('NativeModules').IOSConstants;
+    return constants && constants.isTesting;
+  },
   select: (obj: Object) => obj.ios,
 };
 

React/Base/RCTPlatform.m

@@ -30,6 +30,11 @@ static NSString *interfaceIdiom(UIUserInterfaceIdiom idiom) {
   }
 }
 
+static BOOL isTestingEnvironment(void) {
+  NSDictionary *environment = [[NSProcessInfo processInfo] environment];
+  return [environment[@"IS_TESTING"] boolValue];
+}
+
 RCT_EXPORT_MODULE(IOSConstants)
 
 - (NSDictionary<NSString *, id> *)constantsToExport
@@ -40,6 +45,7 @@ RCT_EXPORT_MODULE(IOSConstants)
     @"osVersion": [device systemVersion],
     @"systemName": [device systemName],
     @"interfaceIdiom": interfaceIdiom([device userInterfaceIdiom]),
+    @"isTesting": @(isTestingEnvironment()),
   };
 }
 

React/Modules/RCTProcessInfo.h

@@ -1,15 +0,0 @@
-/**
- * Copyright (c) 2017-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#import <React/RCTBridge.h>
-#import <React/RCTBridgeModule.h>
-
-@interface RCTProcessInfo : NSObject <RCTBridgeModule>
-
-@end

React/Modules/RCTProcessInfo.m

@@ -1,26 +0,0 @@
-/**
- * Copyright (c) 2017-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#import "RCTProcessInfo.h"
-
-@implementation RCTProcessInfo
-
-RCT_EXPORT_MODULE()
-
-- (NSDictionary *)constantsToExport
-{
-  NSProcessInfo *processInfo = [NSProcessInfo processInfo];
-  return
-  @{
-    @"environment": processInfo.environment,
-    @"arguments": processInfo.arguments,
-    };
-}
-
-@end

docs/Debugging.md

@@ -51,7 +51,7 @@ As with a RedBox, you can use `console.warn()` to trigger a YellowBox.
 
 YellowBoxes can be disabled during development by using `console.disableYellowBox = true;`. Specific warnings can be ignored programmatically by setting an array of prefixes that should be ignored: `console.ignoredYellowBox = ['Warning: ...'];`.
 
-In CI/Xcode, YellowBoxes can also be disabled by setting the `DISABLE_YELLOW_BOX` environment variable.
+In CI/Xcode, YellowBoxes can also be disabled by setting the `IS_TESTING` environment variable.
 
 > RedBoxes and YellowBoxes are automatically disabled in release (production) builds.