Add basic List support.

Author: David Braun

src/index.js

@@ -1,7 +1,9 @@
 import Immutable from 'immutable'
+import List from './list'
 import Map from './map'
 
 module.exports = {
   ...Immutable,
+  List,
   Map
-}
+}

src/list.js

@@ -0,0 +1,15 @@
+import { List } from 'immutable'
+
+export default initialData => {
+  const immutableList = List(initialData)
+
+  return new Proxy(immutableList, {
+    get: (proxy, name) => {
+      const immutableName = name === 'length'
+        ? 'size'
+        : name
+
+      return immutableList.get(immutableName) || immutableList[immutableName]
+    }
+  })
+}

tests/list.js

@@ -0,0 +1,14 @@
+import List from '../src/list'
+import { expect } from 'chai'
+
+describe('List Proxy', () => {
+  it('should access value without calling .get', () => {
+    const data = List([1, 2, 3])
+    expect(data[1]).to.equal(2)
+  })
+
+  it('should provide the "length" property', () => {
+    const data = List([1, 2, 3])
+    expect(data.length).to.equal(3)
+  })
+})