使用茉莉花的可变范围答案

【问题标题】：variable range using jasmine使用茉莉花的可变范围
【发布时间】：2015-09-23 18:43:23
【问题描述】：

我正在尝试从 angularjs 控制器测试一个函数。

注射部分：

var $scope, $controller;

beforeEach(module('sigfoxSDISApp'));
beforeEach(inject(function(_$controller_, $rootScope, _$log_, _$translate_, _DeviceService_, _$filter_, _translatableIndexFilter_){
    $controller = _$controller_;
    $scope = $rootScope.$new();
    $controller =  $controller('AcquitModalCtrl', {
        $scope: $scope,
        $log: _$log_,
        $translate: _$translate_,
        DeviceService: _DeviceService_,
        $filter_: _$filter_,
        translatableIndexFilter: _translatableIndexFilter_
    });
}));

测试：

describe('$scope.getReport', function(){
    this.success = 0;
    this.errors = 0;
    
    it('returns an object with a type, a title and a report', function(){
        var result = $scope.getReport(this.success, this.errors);
        expect(result.type).toBeDefined();
        expect(result.title).toBeDefined();
        expect(result.report).toBeDefined();
    });
    
    describe('getting type, report and title when success = 0 and errors = 1', function(){
        this.errors = 1;
        var result = $scope.getReport(this.success, this.errors);
        
        it('returns a type error', function(){
            expect(result.type).toEqual('error');
        });
        
        it('returns a report empty string', function(){
           expect(result.report).toEqual(''); 
        });
        
        it('returns a title which is not empty string', function(){
            expect(result.title).toMatch(/[a-z]/);
        });
    });
});

第一个“it”函数运行良好。在“成功 = 0 且错误 = 1 时获取类型、报告和标题”中，我收到以下错误：“TypeError: Cannot read property 'getReport' of undefined”

因此在第一个“it”函数之后不再定义 $scope。我不明白为什么。

来自Jasmine Doc

嵌套描述块

描述的调用可以嵌套，在任何级别定义规范。这允许将套件组合为功能树。在执行规范之前，Jasmine 沿着树依次执行每个 beforeEach 函数。规范执行后，Jasmine 类似地遍历 afterEach 函数。

【问题讨论】：

标签： angularjs unit-testing nested jasmine

【解决方案1】：

我只需要在每个 describe 中添加 beforeEach 来更改变量值并执行 getReport 函数，如下所示：

describe('$scope.getReport', function(){
  beforeEach(function(){
    this.success = 0;
    this.errors = 0;
  });


  it('returns an object with a type, a title and a report', function(){
    var result = $scope.getReport(this.success, this.errors);
    expect(result.type).toBeDefined();
    expect(result.title).toBeDefined();
    expect(result.report).toBeDefined();
  });

  describe('getting type, report and title when success = 0 and errors = 1', function(){
    beforeEach(function(){
      this.errors = 1;
      this.result = $scope.getReport(this.success, this.errors);
    )}

    it('returns a type error', function(){
        expect(this.result.type).toEqual('error');
    });

    it('returns a report empty string', function(){
       expect(this.result.report).toEqual(''); 
    });

    it('returns a title which is not empty string', function(){
        expect(this.result.title).toMatch(/[a-z]/);
    });
});

});

【讨论】：