Fixed bug when specs checks for zeroed metric.

Author: marcelduran

lib/specs.js

@@ -120,8 +120,11 @@ function specsRunner(specs, reporter, callback, err, data) {
       }
 
       path.push(key);
-      if (!data[key]) {
-        tests.push({text: path.join('.'), result: new Error('not found')});
+      if (data[key] === undefined || data[key] === null) {
+        tests.push({
+          text: path.join('.'),
+          result: new Error('not found')
+        });
         path.pop();
         return;
       }
@@ -130,7 +133,8 @@ function specsRunner(specs, reporter, callback, err, data) {
       if (typeof spec === 'object' && !spec.min && !spec.max) {
         traverse(spec, data[key]);
       } else if(typeof spec === 'number' && Array.isArray(data[key])) {
-          tests.push(buildTest(path.join('.'), spec, data[key].length, defaults));
+          tests.push(
+            buildTest(path.join('.'), spec, data[key].length, defaults));
           path.pop();
       } else {
         tests.push(buildTest(path.join('.'), spec, data[key], defaults));

test/fixtures/specs.json

@@ -16,6 +16,11 @@
       },
       "score_keep-alive": {
         "min": 90
+      },
+      "breakdown": {
+        "css": {
+          "requests": 2
+        }
       }
     }
   }