如何测试AngularJS自定义提供程序

Max*_*ach 53 unit-testing jasmine angularjs

有没有人有一个如何对提供商进行单元测试的例子?

例如:

config.js

angular.module('app.config', [])
  .provider('config', function () {
    var config = {
          mode: 'distributed',
          api:  'path/to/api'
        };

    this.mode = function (type) {
      if (type) {
        config.isDistributedInstance = type === config.mode;
        config.isLocalInstance = !config.isDistributedInstance;
        config.mode = type;
        return this;
      } else {
        return config.mode;
      }
    };

    this.$get = function () {
      return config;
    };
  }]);
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app.js

angular.module('app', ['app.config'])
  .config(['configProvider', function (configProvider) {
    configProvider.mode('local');
  }]);
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app.js在测试中使用,我看到已配置configProvider,我可以将其作为服务进行测试.但是我如何测试配置能力?或者它根本不需要?

Mar*_*ill 64

我有同样的问题,只在这个Google Group答案中找到了一个有效的解决方案,它引用了小提琴的例子.

测试你的提供者代码看起来像这样(遵循小提琴示例中的代码以及对我有用的东西):

describe('Test app.config provider', function () {

    var theConfigProvider;

    beforeEach(function () {
        // Initialize the service provider 
        // by injecting it to a fake module's config block
        var fakeModule = angular.module('test.app.config', function () {});
        fakeModule.config( function (configProvider) {
            theConfigProvider = configProvider;
        });
        // Initialize test.app injector
        module('app.config', 'test.app.config');

        // Kickstart the injectors previously registered 
        // with calls to angular.mock.module
        inject(function () {});
    });

    describe('with custom configuration', function () {
        it('tests the providers internal function', function () {
            // check sanity
            expect(theConfigProvider).not.toBeUndefined();
            // configure the provider
            theConfigProvider.mode('local');
            // test an instance of the provider for 
            // the custom configuration changes
            expect(theConfigProvider.$get().mode).toBe('local');
        });
    });

});
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jam*_*mes 46

我一直在使用@Mark Gemmill的解决方案并且运行良好,但随后偶然发现了这个稍微不那么冗长的解决方案,无需使用假模块.

/sf/answers/1107985861/

所以,

var provider;

beforeEach(module('app.config', function(theConfigProvider) {
    provider = theConfigProvider;
}))

it('tests the providers internal function', inject(function() {
    provider.mode('local')
    expect(provider.$get().mode).toBe('local');
}));
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如果您的providers $ get方法有依赖关系,您可以手动传递它们,

var provider;

beforeEach(module('app.config', function(theConfigProvider) {
    provider = theConfigProvider;
}))

it('tests the providers internal function', inject(function(dependency1, dependency2) {
    provider.mode('local')
    expect(provider.$get(dependency1, dependency2).mode).toBe('local');
}));
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或者使用$ injector创建一个新实例,

var provider;

beforeEach(module('app.config', function(theConfigProvider) {
    provider = theConfigProvider;
}))

it('tests the providers internal function', inject(function($injector) {
    provider.mode('local')
    var service = $injector.invoke(provider);
    expect(service.mode).toBe('local');
}));
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以上两者还允许您为块中的每个单独it语句重新配置提供程序describe.但是,如果您只需要为多个测试配置一次提供程序,则可以执行此操作,

var service;

beforeEach(module('app.config', function(theConfigProvider) {
    var provider = theConfigProvider;
    provider.mode('local');
}))

beforeEach(inject(function(theConfig){
    service = theConfig;
}));

it('tests the providers internal function', function() {
    expect(service.mode).toBe('local');
});

it('tests something else on service', function() {
    ...
});
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