Comment testez-vous un filtre Angular?
Injectez $filter
Puis appelez-le avec $filter('filterName')(input, options);
Donc, pour tester l'équivalent de ce modèle {{ 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');
});
});
Vous pouvez injecter $ filter et charger le filtre que vous souhaitez tester. Ensuite, vous passez le paramètre à filtrer à travers le filtre que vous avez injecté et vous "attendez" ce dont vous avez besoin. Voici un exemple:
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);
});
});
Le filtre peut être injecté directement dans le test (ont trouvé un extrait ici )
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();
}));
});
Dans cet exemple, le nom du filtre est 'bool', pour injecter ce filtre, vous devez utiliser 'bool' + 'Filter' = 'boolFilter'
Voici un exemple de test de filtre exécutable.
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>
Remarque: cette réponse a été créée après le SO Documentation Sunset basé sur l'exemple de filtre de test unitaire AngularJS et une suggestion sur Meta qui tout le contenu précieux de la documentation doit être converti en réponses.
Il existe d'autres façons de tester un filtre en plus d'injecter le service $filter
Réel.
Exemple:
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);
});
});