Improve code quality and write tests

node_modules/lodash/wrapperReverse.js

@@ -0,0 +1,44 @@
+var LazyWrapper = require('./_LazyWrapper'),
+    LodashWrapper = require('./_LodashWrapper'),
+    reverse = require('./reverse'),
+    thru = require('./thru');
+
+/**
+ * This method is the wrapper version of `_.reverse`.
+ *
+ * **Note:** This method mutates the wrapped array.
+ *
+ * @name reverse
+ * @memberOf _
+ * @since 0.1.0
+ * @category Seq
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * var array = [1, 2, 3];
+ *
+ * _(array).reverse().value()
+ * // => [3, 2, 1]
+ *
+ * console.log(array);
+ * // => [3, 2, 1]
+ */
+function wrapperReverse() {
+  var value = this.__wrapped__;
+  if (value instanceof LazyWrapper) {
+    var wrapped = value;
+    if (this.__actions__.length) {
+      wrapped = new LazyWrapper(this);
+    }
+    wrapped = wrapped.reverse();
+    wrapped.__actions__.push({
+      'func': thru,
+      'args': [reverse],
+      'thisArg': undefined
+    });
+    return new LodashWrapper(wrapped, this.__chain__);
+  }
+  return this.thru(reverse);
+}
+
+module.exports = wrapperReverse;