Add tests

Author: gaearon

package.json

@@ -107,7 +107,7 @@
       "./scripts/jest/environment.js"
     ],
     "setupTestFrameworkScriptFile": "./scripts/jest/test-framework-setup.js",
-    "testRegex": "/__tests__/",
+    "testRegex": "/__tests__/.*\\.js$",
     "moduleFileExtensions": [
       "js",
       "json",

src/renderers/shared/fiber/ReactDebugFiberPerf.js

@@ -42,7 +42,7 @@ if (__DEV__) {
   // Prefix measurements so that it's possible to filter them.
   // Longer prefixes are hard to read in DevTools.
   const reactEmoji = '\u269B';
-  const warningEmoji = '\u26A0\uFE0F';
+  const warningEmoji = '\uD83D\uDED1';
   const supportsUserTiming =
     typeof performance !== 'undefined' &&
     typeof performance.mark === 'function' &&

src/renderers/shared/fiber/ReactFiberScheduler.js

@@ -372,23 +372,28 @@ module.exports = function<T, P, I, TI, PI, C, CX, PL>(config : HostConfig<T, P,
 
   function commitAllLifeCycles() {
     while (nextEffect !== null) {
-      if (__DEV__) {
-        recordEffect();
-      }
-
       const effectTag = nextEffect.effectTag;
 
       // Use Task priority for lifecycle updates
       if (effectTag & (Update | Callback)) {
+        if (__DEV__) {
+          recordEffect();
+        }
         const current = nextEffect.alternate;
         commitLifeCycles(current, nextEffect);
       }
 
       if (effectTag & Ref) {
+        if (__DEV__) {
+          recordEffect();
+        }
         commitAttachRef(nextEffect);
       }
 
       if (effectTag & Err) {
+        if (__DEV__) {
+          recordEffect();
+        }
         commitErrorHandling(nextEffect);
       }
 
@@ -1188,6 +1193,9 @@ module.exports = function<T, P, I, TI, PI, C, CX, PL>(config : HostConfig<T, P,
           popHostContainer(node);
           break;
       }
+      if (__DEV__) {
+        stopWorkTimer(node);
+      }
       node = node.return;
     }
   }