Adding test for default box shadow. Commas are currently being output instead of spaces.

test/css3/boxShadowSpec.js

@@ -0,0 +1,13 @@
+var render = require('../helper/render');
+var ruleset = require('../helper/ruleset');
+
+describe("CSS3 Box Shadow", function () {
+
+  it("should generate a default box shadow", function (done) {
+    render(ruleset('$default-box-shadow-inset: inset; $default-box-shadow-h-offset: 23px; $default-box-shadow-v-offset: 24px; $default-box-shadow-blur: 17px; $default-box-shadow-spread: 15px; $default-box-shadow-color: #DEADBE; $experimental-support-for-mozilla: false; $experimental-support-for-opera: false; @include box-shadow;'), function(output, err) {
+      expect(output).toBe(ruleset('-webkit-box-shadow:inset 23px 24px 17px 15px #DEADBE;box-shadow:inset 23px 24px 17px 15px #DEADBE;'));
+      done();
+    }, ['compass/css3/box-shadow']);
+  });
+
+});