Refactor Spec block execution into Queue

src/Queue.js

@@ -0,0 +1,29 @@
+jasmine.Queue = function() {
+  this.blocks = [];
+};
+
+jasmine.Queue.prototype.add = function(block) {
+  this.setNextOnLastInQueue(block);
+  this.blocks.push(block);
+};
+
+jasmine.Queue.prototype.start = function(onComplete) {
+  if (this.blocks[0]) {
+    this.blocks[0].execute();
+  } else {
+    onComplete();
+  }
+};
+
+/**
+ * @private
+ */
+jasmine.Queue.prototype.setNextOnLastInQueue = function (block) {
+  if (this.blocks.length > 0) {
+    var previousBlock = this.blocks[this.blocks.length - 1];
+    previousBlock.next = function() {
+      block.execute();
+    };
+  }
+};
+