From da1d28e02e1761d89f1964ceac2a3c5d525340fd Mon Sep 17 00:00:00 2001
From: harttle <yangjvn@126.com>
Date: Tue, 25 Oct 2016 18:12:24 +0800
Subject: [PATCH] feature: unshift and shift for scope, working on #15

---
 src/scope.js  |  8 +++++++-
 test/scope.js | 12 ++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/scope.js b/src/scope.js
index 9a98fdef3..a7fd15231 100644
--- a/src/scope.js
+++ b/src/scope.js
@@ -41,7 +41,13 @@ var Scope = {
 	pop: function() {
 		return this.scopes.pop();
 	},
-
+    unshift: function(ctx) {
+        if (!ctx) throw new Error('trying to push $(ctx) into scopes');
+        return this.scopes.unshift(ctx);
+    },
+    shift: function() {
+        return this.scopes.shift();
+    },
 	setPropertyByPath: function(obj, path, val) {
 		if (_.isString(path)) {
 			var paths = path.replace(/\[/g, '.').replace(/\]/g, '').split('.');
diff --git a/test/scope.js b/test/scope.js
index 3a8332eca..7591438ac 100644
--- a/test/scope.js
+++ b/test/scope.js
@@ -113,5 +113,17 @@ describe('scope', function() {
 			scope.pop();
 			expect(scope.get('foo')).to.equal('zoo');
 		});
+        it('should unshift scope', function() {
+            scope.unshift({foo: 'blue', foo1: 'foo1'})
+            scope.get('foo').should.equal('zoo');
+            scope.get('foo1').should.equal('foo1');
+        });
+
+        it('should shift scope', function() {
+            scope.unshift({foo: 'blue', foo1: 'foo1'});
+            scope.shift();
+            expect(scope.get('foo')).to.equal('zoo');
+            expect(scope.get('foo1')).to.equal(undefined);
+        });
 	});
 });