Method for testing whether a user has enough credits to earn a badge.

models/badge.js

@@ -95,6 +95,24 @@ Badge.findByBehavior = function findByBehavior(shortnames, callback) {
   return Badge.find(searchTerms, callback);
 };
 
+
+/**
+ * Check if the credits are enough to earn the badge
+ *
+ * @param {User} user An object resembling a User object.
+ * @return {Boolean} whether or not the badge is earned by the credits
+ */
+
+Badge.prototype.hasEnoughCredit = function hasEnoughCredit(user) {
+  return this.behaviors.map(function (behavior) {
+    var name = behavior.shortname;
+    var minimum = behavior.count;
+    return user.credit[name] >= minimum;
+  }).reduce(function (result, value) {
+    return result && value;
+  }, true);
+};
+
 /**
  * Remove a behavior from the list of required behaviors for the badge
  *

test/badge-model.test.js

@@ -160,6 +160,23 @@ test.applyFixtures(fixtures, function () {
     });
   });
 
+  test('Badge#hasEnoughCredit: should have enough', function (t) {
+    var badge = fixtures['link-comment'];
+    var expect = true;
+    var result = badge.hasEnoughCredit({ credit: { link: 10, comment: 10 }});
+    t.same(expect, result);
+    t.end();
+  });
+
+  test('Badge#hasEnoughCredit: not enough', function (t) {
+    var badge = fixtures['link-comment'];
+    var expect = false;
+    var result = badge.hasEnoughCredit({ credit: { link: 10 }});
+    t.same(expect, result);
+    t.end();
+  });
+
+
   test('Badge default: shortname', function (t) {
     var badge = new Badge({
       name: 'An   awesome badge!',