add fix for custom tests

lib/build-query.js

@@ -14,14 +14,19 @@ define(['lodash', 'metadata'], function(_, metadata) {
     var dontmin = !config.minify;
 
     // Config uses amdPaths, but build query uses property names
-    var props = _.map(config['feature-detects'], function(amdPath) {
-      var detect = getDetectObjByAmdPath(amdPath);
-      var property = detect && detect.property;
-      property = _.isArray(property) ?
-        property.join('_').replace('-', '_') :
-        property.replace('-', '_');
-      return property;
-    });
+    var props = _.chain(config['feature-detects'])
+      .map(function(amdPath) {
+        var detect = getDetectObjByAmdPath(amdPath);
+        var property = detect && detect.property;
+        if (property) {
+          property = _.isArray(property) ?
+            property.join('_').replace('-', '_') :
+            property.replace('-', '_');
+          return property;
+        }
+    })
+    .filter()
+    .value();
 
     // Config uses amdPaths, but the option's just use their names.
     // A few of the values have to be massaged in order to match

test/universal/lib/build-query.js

@@ -79,6 +79,14 @@ describe('build-query', function() {
     expect(query).to.be('?-');
   });
 
+  it('removes custom tests from the build query', function() {
+      var query = buildQuery({
+            'feature-detects': ['css/boxsizing', 'custom/test/path']
+          });
+      expect(query).to.be('?-boxsizing-dontmin');
+    });
+
+
   after(function() {
     cleanup();
   });