Only add a fake spec when there are not any specs in the current inst…

…ance but there are specs in another instance. fixes #30

lib/karma-parallelizer.js

@@ -70,7 +70,8 @@ function createFakeTestContext(ctx, shouldUseDescription) {
   var isFaking = false; // Are we currently faking out describe blocks to look for tests for other instances
   var hasFocusedWhileFaking = false; // Have we found a focus tests for another instance
   var hasFocusedWithoutFaking = false; // Have we registerd at least one focus test for this instance
-  var hasSpecs = false; // Have we registered at least one test for this instance
+  var hasOwnSpecs = false; // Have we registered at least one test for this instance
+  var hasOtherSpecs = false; // Have we seen at least one test for another instance
   var forceDescribe = false; //
 
   function wrapDescription(def) {
@@ -85,15 +86,16 @@ function createFakeTestContext(ctx, shouldUseDescription) {
   }
 
   // On focus spec in mocha we need to return the test result and need to
-  function wrap(fn, isFocus, isDescription, isSpec) {
+  function wrap(fn, isFocus, isDescription, isSpec, isSkipped) {
     if (!fn) return fn;
     return function(name, def) {
       if (isDescription && depth === 0) {
         // Reset isFaking on top-level descriptions
         isFaking = !shouldUseDescription(name, def);
       }
 
-      hasSpecs                = hasSpecs                || (isSpec  && !isFaking);
+      hasOwnSpecs             = hasOwnSpecs             || (isSpec  && !isFaking);
+      hasOtherSpecs           = hasOtherSpecs           || (isSpec  &&  isFaking);
       hasFocusedWhileFaking   = hasFocusedWhileFaking   || (isFocus &&  isFaking);
       hasFocusedWithoutFaking = hasFocusedWithoutFaking || (isFocus && !isFaking);
 
@@ -148,9 +150,9 @@ function createFakeTestContext(ctx, shouldUseDescription) {
           (ctx.fit || ctx.iit || ctx.it.only).call(ctx, 'should prevent other tests from running', function(){});
         });
       }
-      if (!hasSpecs) {
+      if (!hasOwnSpecs && hasOtherSpecs) {
         ctx.describe('[karma-parallel] Add single test to prevent failure', function() {
-          (ctx.it || ctx.specify).call(ctx, 'should prevent failing by having sucessful tests', function(){});
+          (ctx.it || ctx.specify).call(ctx, 'should prevent on this shard failing by having successful tests', function(){});
         });
       }
       forceDescribe = false;