From b025c43487d72fa8a1d92608702e86148b459f0b Mon Sep 17 00:00:00 2001
From: Dominic Gannaway <dg@domgan.com>
Date: Mon, 27 Mar 2017 15:46:18 +0100
Subject: [PATCH] Added init() dev block to ReactTestUtils

---
 scripts/rollup/build.js    |  1 +
 src/test/ReactTestUtils.js | 60 ++++++++++++++++++++++----------------
 2 files changed, 36 insertions(+), 25 deletions(-)

diff --git a/scripts/rollup/build.js b/scripts/rollup/build.js
index d5e81b0a25..3b1a10c1b2 100644
--- a/scripts/rollup/build.js
+++ b/scripts/rollup/build.js
@@ -184,6 +184,7 @@ function uglifyConfig(mangle) {
     },
     mangle: mangle ? {
       screw_ie8: true,
+      toplevel: true,
     } : false,
   };
 }
diff --git a/src/test/ReactTestUtils.js b/src/test/ReactTestUtils.js
index d3190de877..8ea04565bd 100644
--- a/src/test/ReactTestUtils.js
+++ b/src/test/ReactTestUtils.js
@@ -486,19 +486,7 @@ function buildSimulators() {
   }
 }
 
-// Rebuild ReactTestUtils.Simulate whenever event plugins are injected
-var oldInjectEventPluginOrder = EventPluginHub.injection.injectEventPluginOrder;
-EventPluginHub.injection.injectEventPluginOrder = function() {
-  oldInjectEventPluginOrder.apply(this, arguments);
-  buildSimulators();
-};
-var oldInjectEventPlugins = EventPluginHub.injection.injectEventPluginsByName;
-EventPluginHub.injection.injectEventPluginsByName = function() {
-  oldInjectEventPlugins.apply(this, arguments);
-  buildSimulators();
-};
 
-buildSimulators();
 
 /**
  * Exports:
@@ -537,18 +525,40 @@ function makeNativeSimulator(eventType) {
   };
 }
 
-Object.keys(topLevelTypes).forEach(function(eventType) {
-  // Event type is stored as 'topClick' - we transform that to 'click'
-  var convenienceName = eventType.indexOf('top') === 0
-    ? eventType.charAt(3).toLowerCase() + eventType.substr(4)
-    : eventType;
-  /**
-   * @param {!Element|ReactDOMComponent} domComponentOrNode
-   * @param {?Event} nativeEventData Fake native event to use in SyntheticEvent.
-   */
-  ReactTestUtils.SimulateNative[convenienceName] = makeNativeSimulator(
-    eventType,
-  );
-});
+function init() {
+  // Rebuild ReactTestUtils.Simulate whenever event plugins are injected
+  var oldInjectEventPluginOrder = EventPluginHub.injection.injectEventPluginOrder;
+  EventPluginHub.injection.injectEventPluginOrder = function() {
+    oldInjectEventPluginOrder.apply(this, arguments);
+    buildSimulators();
+  };
+  var oldInjectEventPlugins = EventPluginHub.injection.injectEventPluginsByName;
+  EventPluginHub.injection.injectEventPluginsByName = function() {
+    oldInjectEventPlugins.apply(this, arguments);
+    buildSimulators();
+  };
+
+  buildSimulators();
+
+  Object.keys(topLevelTypes).forEach(function(eventType) {
+    // Event type is stored as 'topClick' - we transform that to 'click'
+    var convenienceName = eventType.indexOf('top') === 0
+      ? eventType.charAt(3).toLowerCase() + eventType.substr(4)
+      : eventType;
+    /**
+     * @param {!Element|ReactDOMComponent} domComponentOrNode
+     * @param {?Event} nativeEventData Fake native event to use in SyntheticEvent.
+     */
+    ReactTestUtils.SimulateNative[convenienceName] = makeNativeSimulator(
+      eventType,
+    );
+  });
+}
+
+if (__DEV__) {
+  init();
+} else {
+  throw new Error('ReactTestUtils requires DEV');
+}
 
 module.exports = ReactTestUtils;