Add scar tests.

test-scar/util/modjs.js

@@ -0,0 +1,17 @@
+const lodash = window._;
+const modjs = window.modulejs;
+
+function clearModulejs() {
+    lodash.each(modjs._private.instances, (val, key) => {
+        delete modjs._private.instances[key]; // eslint-disable-line prefer-reflect
+    });
+}
+
+function mockConfigModule() {
+    modjs.define('config', {_dummyConfig: true});
+}
+
+module.exports = {
+    clearModulejs,
+    mockConfigModule
+};