Separate clear stack and run it after each spec

[finishes #50197985][fix #109418332]
- Fixes #985
- Fixes #945
- Fixes #366

src/core/ClearStack.js

@@ -0,0 +1,36 @@
+getJasmineRequireObj().clearStack = function(j$) {
+  function messageChannelImpl(global) {
+    var channel = new global.MessageChannel(),
+        head = {},
+        tail = head;
+
+    channel.port1.onmessage = function() {
+      head = head.next;
+      var task = head.task;
+      delete head.task;
+      task();
+    };
+
+    return function clearStack(fn) {
+      tail = tail.next = { task: fn };
+      channel.port2.postMessage(0);
+    };
+  }
+
+  function getClearStack(global) {
+    if (global && global.process && j$.isFunction_(global.process.nextTick)) {
+      return global.process.nextTick;
+    } else if (j$.isFunction_(global.setImmediate)) {
+      return global.setImmediate;
+    } else if (!j$.util.isUndefined(global.MessageChannel)) {
+      return messageChannelImpl(global);
+    } else if (j$.isFunction_(global.setTimeout)) {
+      var realSetTimeout = global.setTimeout;
+      return function clearStack(fn) {
+        realSetTimeout(fn, 0);
+      }
+    }
+  }
+
+  return getClearStack;
+};

src/core/Env.js

@@ -11,6 +11,7 @@ getJasmineRequireObj().Env = function(j$) {
 
     var realSetTimeout = j$.getGlobal().setTimeout;
     var realClearTimeout = j$.getGlobal().clearTimeout;
+    var clearStack = j$.getClearStack(j$.getGlobal());
     this.clock = new j$.Clock(global, function () { return new j$.DelayedFunctionScheduler(); }, new j$.MockDate(global));
 
     var runnableResources = {};
@@ -154,16 +155,6 @@ getJasmineRequireObj().Env = function(j$) {
     var maximumSpecCallbackDepth = 20;
     var currentSpecCallbackDepth = 0;
 
-    function clearStack(fn) {
-      currentSpecCallbackDepth++;
-      if (currentSpecCallbackDepth >= maximumSpecCallbackDepth) {
-        currentSpecCallbackDepth = 0;
-        realSetTimeout(fn, 0);
-      } else {
-        fn();
-      }
-    }
-
     var catchException = function(e) {
       return j$.Spec.isPendingSpecException(e) || catchExceptions;
     };

src/core/QueueRunner.js

@@ -42,11 +42,7 @@ getJasmineRequireObj().QueueRunner = function(j$) {
       }
     }
 
-    var runnerDone = iterativeIndex >= length;
-
-    if (runnerDone) {
-      this.clearStack(this.onComplete);
-    }
+    this.clearStack(this.onComplete);
 
     function attemptSync(queueableFn) {
       try {

src/core/requireCore.js

@@ -30,6 +30,7 @@ var getJasmineRequireObj = (function (jasmineGlobal) {
     j$.Anything = jRequire.Anything(j$);
     j$.CallTracker = jRequire.CallTracker(j$);
     j$.MockDate = jRequire.MockDate();
+    j$.getClearStack = jRequire.clearStack(j$);
     j$.Clock = jRequire.Clock();
     j$.DelayedFunctionScheduler = jRequire.DelayedFunctionScheduler();
     j$.Env = jRequire.Env(j$);