Allow user to stop a specs execution when an expectation fails

[finish #1165916] #577

src/core/Spec.js

@@ -12,6 +12,7 @@ getJasmineRequireObj().Spec = function(j$) {
     this.expectationResultFactory = attrs.expectationResultFactory || function() { };
     this.queueRunnerFactory = attrs.queueRunnerFactory || function() {};
     this.catchingExceptions = attrs.catchingExceptions || function() { return true; };
+    this.throwOnExpectationFailure = !!attrs.throwOnExpectationFailure;
 
     if (!this.queueableFn.fn) {
       this.pend();
@@ -33,6 +34,10 @@ getJasmineRequireObj().Spec = function(j$) {
       this.result.passedExpectations.push(expectationResult);
     } else {
       this.result.failedExpectations.push(expectationResult);
+
+      if(this.throwOnExpectationFailure){
+        throw new j$.errors.ExpectationFailed();
+      }
     }
   };
 
@@ -76,6 +81,10 @@ getJasmineRequireObj().Spec = function(j$) {
       return;
     }
 
+    if (e instanceof j$.errors.ExpectationFailed) {
+      return;
+    }
+
     this.addExpectationResult(false, {
       matcherName: '',
       passed: false,