76

这个自定义验证指令是官方 Angular 站点上的一个示例。 http://docs.angularjs.org/guide/forms 它检查文本输入是否为数字格式。

var INTEGER_REGEXP = /^\-?\d*$/;
app.directive('integer', function() {
  return {
    require: 'ngModel',
    link: function(scope, elm, attrs, ctrl) {
      ctrl.$parsers.unshift(function(viewValue) {
        if (INTEGER_REGEXP.test(viewValue)) {
          // it is valid
          ctrl.$setValidity('integer', true);
          return viewValue;
        } else {
          // it is invalid, return undefined (no model update)
          ctrl.$setValidity('integer', false);
          return undefined;
        }
      });
    }
  };
});

为了对这段代码进行单元测试,我写了这个:

describe('directives', function() {
  beforeEach(module('exampleDirective'));

  describe('integer', function() {
    it('should validate an integer', function() {
      inject(function($compile, $rootScope) {
        var element = angular.element(
          '<form name="form">' +
            '<input ng-model="someNum" name="someNum" integer>' +
          '</form>'
          );
        $compile(element)($rootScope);
        $rootScope.$digest();
        element.find('input').val(5);
        expect($rootScope.someNum).toEqual(5);
      });
    });
  });
});

然后我得到这个错误:

Expected undefined to equal 5.
Error: Expected undefined to equal 5.

我将打印语句放在各处以查看发生了什么,看起来该指令从未被调用过。测试这样一个简单指令的正确方法是什么?

4

3 回答 3

88

另一个答案的测试应该写成:

describe('directives', function() {
  var $scope, form;
  beforeEach(module('exampleDirective'));
  beforeEach(inject(function($compile, $rootScope) {
    $scope = $rootScope;
    var element = angular.element(
      '<form name="form">' +
      '<input ng-model="model.somenum" name="somenum" integer />' +
      '</form>'
    );
    $scope.model = { somenum: null }
    $compile(element)($scope);
    form = $scope.form;
  }));

  describe('integer', function() {
    it('should pass with integer', function() {
      form.somenum.$setViewValue('3');
      $scope.$digest();
      expect($scope.model.somenum).toEqual('3');
      expect(form.somenum.$valid).toBe(true);
    });
    it('should not pass with string', function() {
      form.somenum.$setViewValue('a');
      $scope.$digest();
      expect($scope.model.somenum).toBeUndefined();
      expect(form.somenum.$valid).toBe(false);
    });
  });
});

注意$scope.$digest()now 是在 之后调用的$setViewValue。这会将表单设置为“脏”状态,否则它将保持“原始”状态,这可能不是您想要的。

于 2014-03-31T21:26:35.527 回答
67

我通过阅读 angular-app 代码找到了它https://github.com/angular-app/angular-app 这个视频也有帮助http://youtu.be/ZhfUv0spHCY?t=31m17s

我犯了两个错误:

  • 执行 ng-model 时不要直接绑定到作用域
  • 使用表单控制器直接操作为指令传递的内容

这是更新的版本。指令是一样的,只是我改变的测试。

describe('directives', function() {
  var $scope, form;
  beforeEach(module('exampleDirective'));
  beforeEach(inject(function($compile, $rootScope) {
    $scope = $rootScope;
    var element = angular.element(
      '<form name="form">' +
        '<input ng-model="model.somenum" name="somenum" integer />' +
      '</form>'
    );
    $scope.model = { somenum: null }
    $compile(element)($scope);
    $scope.$digest();
    form = $scope.form;
  }));

  describe('integer', function() {
    it('should pass with integer', function() {
      form.somenum.$setViewValue('3');
      expect($scope.model.somenum).toEqual('3');
      expect(form.somenum.$valid).toBe(true);
    });
    it('should not pass with string', function() {
      form.somenum.$setViewValue('a');
      expect($scope.model.somenum).toBeUndefined();
      expect(form.somenum.$valid).toBe(false);
    });
  });
});
于 2013-07-06T07:52:31.873 回答
2

我测试我的自定义指令,在对象“$error”中搜索自定义验证的名称。例子:

  'use strict';

describe('Directive: validadorCorreo', function () {

  // load the directive's module
  beforeEach(module('sistemaRegistroProCivilApp'));

  var inputCorreo, formulario, elementoFormulario, scope, $compile;

  beforeEach(inject(function ($rootScope, _$compile_) {
    scope = $rootScope.$new();
    $compile = _$compile_;

    elementoFormulario = angular.element('<form name="formulario">' + 
      '<input type="text" name="correo" data-ng-model="correo" required data-validador-correo/>' + 
      '</form');
    scope.correo = '';
    elementoFormulario = $compile(elementoFormulario)(scope);
    scope.$digest();
    inputCorreo = elementoFormulario.find('input');
    formulario = scope.formulario;
    console.log(formulario.correo.$error);
  }));

  it('Deberia Validar si un correo ingresado en el input es correcto e incorrecto', inject(function ($compile) {

    inputCorreo.val('eric+@eric.com').triggerHandler('input');
    expect(formulario.correo.$error.email).toBe(true); //Here, the name of the custom validation appears in the $error object.
    console.log(formulario.correo.$error);

    inputCorreo.val('eric@eric.com').triggerHandler('input');
    expect(formulario.correo.$error.email).toBeUndefined();//Here, the name of the custom validation disappears in the $error object. Is Undefined
    console.log(formulario.correo.$error.email)
  }));
});

我希望我能帮助你!

于 2015-08-12T21:21:23.480 回答