AngularJS 1.x에서 필터를 단위 테스트하는 방법

AngularJS 1.x에서 필터를 단위 테스트하는 방법

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Angular에서 필터를 어떻게 단위 테스트합니까?

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주입 $filter한 다음$filter('filterName')(input, options);

따라서이 템플릿과 동등한 것을 테스트하려면 {{ foo | testFilter:capitalize }}

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');
  });
});

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$ filter를 삽입하고 테스트 할 필터를로드 할 수 있습니다. 그런 다음 주입 한 필터를 통해 필터링 할 매개 변수를 전달하고 필요한 것을 '기대'합니다. 다음은 그 예입니다.

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);
  });
});

---

필터를 테스트에 바로 삽입 할 수 있습니다 ( 여기 에서 스 니펫을 찾았 습니다 ).

  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();
    }));

  });

이 예제에서 필터 이름은 'bool'입니다.이 필터를 삽입하려면 'bool'+ 'Filter'= 'boolFilter'를 사용해야합니다.

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실제 $filter서비스를 주입하는 것 외에 필터를 테스트하는 다른 방법이 있습니다 .

예:

describe('FILTER: myFilterName', function(){ // You can put anything in the string here,
                                             // I like declaring FILTER: myFilterName, but it 
                                             // could be just the filter name.

var myTestTheFilterVariableName;
// This variable does not have to match the describe name, call it what you wish,
// but use this variable in any it blocks below.

beforeEach(module('obsidian')); // Include app - boilerplate.

beforeEach(inject(function(actualFilterNameFilter){
// If your test variable name is the same as 'actualFilterNameFilter' then you would 
// use this name '_actualFilterNameFilter_' with underscores; The Angularjs injector will
// remove the underscores for you.
// IMPORTANT PART: The important part here is the trailing 'Filter' name. This is how Angularjs
// Knows to grab the filter title "actualFilterName" in this case.

  myTestTheFilterVariableName = actualFilterNameFilter;

})); // This is where you actually include the filter for testing.
     // Use the underscores if your variable name is the exact same as the injected parameter.
     // This is where you would use your variable name from above.


  it('should do something here', function(){
    expect(myTestTheFilterVariableName(filterParameter)).toEqual(expectedResultHere);
  });
});

---

여기에 실행 가능한 필터 테스트 예제가 있습니다.

angular.module('myModule', []).filter('multiplier', function() {
  return function(number, multiplier) {
    if (!angular.isNumber(number)) {
      throw new Error(number + " is not a number!");
    }
    if (!multiplier) {
      multiplier = 2;
    }
    return number * multiplier;
  }
});

describe('multiplierFilter', function() {
  var filter;

  beforeEach(function() {
    module('myModule');
    inject(function(multiplierFilter) {
      filter = multiplierFilter;
    });
  });

  it('multiply by 2 by default', function() {
    expect(filter(2)).toBe(4);
    expect(filter(3)).toBe(6);
  });

  it('allow to specify custom multiplier', function() {
    expect(filter(2, 4)).toBe(8);
  });

  it('throws error on invalid input', function() {
    expect(function() {
      filter(null);
    }).toThrow();
  });
});

<link href="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine-html.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/boot.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular-mocks.js"></script>

Note: this answer was created after the SO Documentation Sunset based on the AngularJS unit test filter example and a suggestion on Meta that all valuable documentation content should be converted into answers.

참고URL : https://stackoverflow.com/questions/21094569/how-to-unit-test-a-filter-in-angularjs-1-x