ensure karma fails if it cannot load all spec files

spec/javascripts/test_bundle.js

@@ -34,7 +34,11 @@ testsContext.keys().forEach(function (path) {
   try {
     testsContext(path);
   } catch (err) {
-    console.error('[ERROR] WITH SPEC FILE: ', path);
-    console.error(err);
+    console.error('[ERROR] Unable to load spec: ', path);
+    describe('Test bundle', function () {
+      it(`includes '${path}'`, function () {
+        expect(err).toBeNull();
+      });
+    });
   }
 });