#382 Makes 'cloneAllBefore' a reusable method

lib/_lg-clone-all-before.js

@@ -0,0 +1,22 @@
+/**
+ * Performs the "cloneBefore" method for each key/value pair given
+ *
+ * @param {object} props - Key/Value pairs for each CloneBefore
+ * @param {Declaration} decl - The PostCSS Declaration
+ *
+ * @example
+ *
+ * cloneAllBefore({
+ *   'margin-left': '0 !important',
+ *   'margin-right': lostOffsetGutter + ' !important',
+ *   declaration
+ * });
+ */
+module.exports = function lgCloneAllBefore(props, decl) {
+  Object.keys(props).forEach(function traverseProps(prop) {
+    decl.cloneBefore({
+      prop: prop,
+      value: props[prop]
+    });
+  });
+};

lib/_lg-clone-all-before.spec.js

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+/* globals describe, require, it, beforeEach */
+
+'use strict';
+
+var chai = require('chai');
+var sinon = require('sinon');
+var sinonChai = require('sinon-chai');
+var expect = chai.expect;
+
+var lgCloneAllBefore = require('./_lg-clone-all-before');
+
+chai.use(sinonChai);
+
+describe('lgCloneAllBefore', function () {
+  var decl = {};
+
+  beforeEach(function () {
+    decl.cloneBefore = function () {};
+  });
+
+  it('calls "cloneBefore" correctly', function () {
+    decl.cloneBefore = sinon.spy();
+    lgCloneAllBefore({'margin-left': '0'}, decl);
+    expect(decl.cloneBefore)
+      .to.have.been.calledWith({
+        prop: 'margin-left',
+        value: '0',
+      });
+  });
+});