fix($parser): string concatination with undefined model

Closes #988

1 files changed, 26 insertions, 0 deletions

diff --git a/test/ng/interpolateSpec.js b/test/ng/interpolateSpec.js
index 20214445..2f4d4645 100644
--- a/test/ng/interpolateSpec.js
+++ b/test/ng/interpolateSpec.js
@@ -15,6 +15,7 @@ describe('$interpolate', function() {
 
   it('should suppress falsy objects', inject(function($interpolate) {
     expect($interpolate('{{undefined}}')()).toEqual('');
+    expect($interpolate('{{undefined+undefined}}')()).toEqual('');
     expect($interpolate('{{null}}')()).toEqual('');
     expect($interpolate('{{a.b}}')()).toEqual('');
   }));
@@ -32,6 +33,31 @@ describe('$interpolate', function() {
   }));
 
 
+  it('should ignore undefined model', inject(function($interpolate) {
+    expect($interpolate("Hello {{'World' + foo}}")()).toEqual('Hello World');
+  }));
+
+
+  it('should ignore undefined return value', inject(function($interpolate, $rootScope) {
+    $rootScope.foo = function() {return undefined};
+    expect($interpolate("Hello {{'World' + foo()}}")($rootScope)).toEqual('Hello World');
+  }));
+
+
+  describe('provider', function() {
+    beforeEach(module(function($interpolateProvider) {
+      $interpolateProvider.startSymbol('--');
+      $interpolateProvider.endSymbol('--');
+    }));
+
+    it('should not get confused with same markers', inject(function($interpolate) {
+      expect($interpolate('---').parts).toEqual(['---']);
+      expect($interpolate('----')()).toEqual('');
+      expect($interpolate('--1--')()).toEqual('1');
+    }));
+  });
+
+
   describe('parseBindings', function() {
     it('should Parse Text With No Bindings', inject(function($interpolate) {
       var parts = $interpolate("a").parts;