我正在尝试实现依赖于范围变量的测试.我想启用ng-switch-when来解析表达式.这就是我要做的事情(使用$rootScope更新):
it('should switch on array changes',inject(function($rootScope,$compile) { element = $compile( '<div ng-switch="select">' + '<div ng-switch-when="test[0]">test[0]:{{test[0]}}</div>' + '</div>')($rootScope); expect(element.html()).toEqual('<!-- ngSwitchWhen: test[0] -->'); $rootScope.test = ["leog"]; $rootScope.select = "leog"; $rootScope.$apply(); expect(element.text()).toEqual('test[0]:leog'); }));
我的问题是,我为此工作的实现没有得到范围变量“test”来评估和工作,因为我期望.这是实施:
var ngSwitchWhenDirective = ngDirective({ transclude: 'element',priority: 800,require: '^ngSwitch',compile: function(element,attrs) { return function(scope,element,attr,ctrl,$transclude) { var expr = scope.$eval(attrs.ngSwitchWhen),ngSwitchWhen = expr !== undefined ? expr : attrs.ngSwitchWhen; ctrl.cases['!' + ngSwitchWhen] = (ctrl.cases['!' + ngSwitchWhen] || []); ctrl.cases['!' + ngSwitchWhen].push({ transclude: $transclude,element: element }); }; } });
有谁知道我做错了什么?任何帮助将不胜感激.
提前致谢!
UPDATE
只是为了澄清,这是一个如何从Angular团队测试ng-switch的例子.只是为了表明我正在以类似的方式进行测试,但没有达到预期的结果.
而且,我忘了将我的代码转换为$rootScope,你到目前为止看到的是我尝试创建一个新范围以避免依赖$rootScope进行更改.
it('should switch on value change',$compile) { element = $compile( '<div ng-switch="select">' + '<div ng-switch-when="1">first:{{name}}</div>' + '<div ng-switch-when="2">second:{{name}}</div>' + '<div ng-switch-when="true">true:{{name}}</div>' + '</div>')($rootScope); expect(element.html()).toEqual( '<!-- ngSwitchWhen: 1 --><!-- ngSwitchWhen: 2 --><!-- ngSwitchWhen: true -->'); $rootScope.select = 1; $rootScope.$apply(); expect(element.text()).toEqual('first:'); $rootScope.name="shyam"; $rootScope.$apply(); expect(element.text()).toEqual('first:shyam'); $rootScope.select = 2; $rootScope.$apply(); expect(element.text()).toEqual('second:shyam'); $rootScope.name = 'misko'; $rootScope.$apply(); expect(element.text()).toEqual('second:misko'); $rootScope.select = true; $rootScope.$apply(); expect(element.text()).toEqual('true:misko'); }));
解决方法
因此,在移动一些代码后,我发现在编译要测试的元素之前,应该定义在使用$rootScope更改以测试该功能时不涉及的变量.谢谢@Jonathan的暗示.
以下是包含其他测试用例的工作代码:
it('should evaluate expressions to match switch value',$compile) { $rootScope.array = ["leog",".me"]; $rootScope.obj = {"key": "value"}; $rootScope.$apply(); element = $compile( '<div ng-switch="select">' + '<div ng-switch-when="obj.key">obj.key:{{obj.key}}</div>' + '<div ng-switch-when="array[0]">array[0]:{{array[0]}}</div>' + '<div ng-switch-when="array[1]">array[1]:{{array[1]}}</div>' + '</div>')($rootScope); expect(element.html()).toEqual('<!-- ngSwitchWhen: obj.key -->' + '<!-- ngSwitchWhen: array[0] -->' + '<!-- ngSwitchWhen: array[1] -->'); $rootScope.select = "value1"; $rootScope.$apply(); expect(element.text()).toEqual('obj.key:value'); $rootScope.select = "leog"; $rootScope.$apply(); expect(element.text()).toEqual('array[0]:leog'); $rootScope.select = ".me"; $rootScope.$apply(); expect(element.text()).toEqual('array[1]:.me'); }));
谢谢大家.