also test dynamic get

Author: yyx990803

src/api/data.js

@@ -1,4 +1,3 @@
-var _ = require('../util')
 var Watcher = require('../watcher')
 var Path = require('../parsers/path')
 var textParser = require('../parsers/text')

src/parsers/expression.js

@@ -146,6 +146,7 @@ function compilePathFns (exp) {
   if (exp.indexOf('[') < 0) {
     // really simple path
     path = exp.split('.')
+    path.raw = exp
     getter = Path.compileGetter(path)
   } else {
     // do the real parsing

test/unit/specs/parsers/path_spec.js

@@ -85,6 +85,17 @@ describe('Path Parser', function () {
     expect(Path.get(obj, 'a.c')).toBeUndefined()
   })
 
+  it('get dynamic', function () {
+    var path = 'a[b]'
+    var obj = {
+      a: {
+        key: 123
+      },
+      b: 'key'
+    }
+    expect(Path.get(obj, path)).toBe(123)
+  })
+
   it('set', function () {
     var path = 'a.b.c'
     var obj = {