问如何在AngularJS 1.x中对过滤器进行单元测试

EN

describe('The test filter', function () {
  'use strict'; 

  var $filter;

  beforeEach(function () {
    module('myTestFilterModule');

    inject(function (_$filter_) {
      $filter = _$filter_;
    });
  });

  it('should capitalize a string', function () {
    // Arrange.
    var foo = 'hello world', result;

    // Act.
    result = $filter('testFilter')(foo, 'capitalize');

    // Assert.
    expect(result).toEqual('HELLO WORLD');
  });
});

describe('Filter test', function(){

  var filter;

  beforeEach(function(){
    module.apply(moduleName);

    inject(function($injector){
      filter = $injector.get('$filter')('nameOfTheFilter');
    });
  });

  it('should filter the parameters passed', function(){
    expect(filter(parameterToBeFiltered)).toBe(Result);
  });
});

  describe('myApp', function () {

    beforeEach(function () {
      module('myApp');
    });

    it('has a bool filter', inject(function($filter) {
      expect($filter('bool')).not.toBeNull();
    }));

    it("should return true empty array ", inject(function (boolFilter) {
      expect(boolFilter(true)).toBeTruthy();
    }));

  });