TypeScript query_list.QueryList类代码示例

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本文整理汇总了TypeScript中angular2/src/core/compiler/query_list.QueryList类的典型用法代码示例。如果您正苦于以下问题：TypeScript QueryList类的具体用法？TypeScript QueryList怎么用？TypeScript QueryList使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了QueryList类的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的TypeScript代码示例。

示例1: describe

  describe('QueryList', () => {
    var queryList: QueryList<string>;
    var log: string;
    beforeEach(() => {
      queryList = new QueryList<string>();
      log = '';
    });

    function logAppend(item) { log += (log.length == 0 ? '' : ', ') + item; }

    it('should support adding objects and iterating over them', () => {
      queryList.add('one');
      queryList.add('two');
      iterateListLike(queryList, logAppend);
      expect(log).toEqual('one, two');
    });

    it('should support resetting and iterating over the new objects', () => {
      queryList.add('one');
      queryList.add('two');
      queryList.reset(['one again']);
      queryList.add('two again');
      iterateListLike(queryList, logAppend);
      expect(log).toEqual('one again, two again');
    });

    it('should support length', () => {
      queryList.add('one');
      queryList.add('two');
      expect(queryList.length).toEqual(2);
    });

    it('should support map', () => {
      queryList.add('one');
      queryList.add('two');
      expect(queryList.map((x) => x)).toEqual(['one', 'two']);
    });

    it('should support first and last', () => {
      queryList.add('one');
      queryList.add('two');
      queryList.add('three');
      expect(queryList.first).toEqual('one');
      expect(queryList.last).toEqual('three');
    });

    describe('simple observable interface', () => {
      it('should fire callbacks on change', () => {
        var fires = 0;
        queryList.onChange(() => { fires += 1; });

        queryList.fireCallbacks();
        expect(fires).toEqual(0);

        queryList.add('one');

        queryList.fireCallbacks();
        expect(fires).toEqual(1);

        queryList.fireCallbacks();
        expect(fires).toEqual(1);
      });

      it('should support removing callbacks', () => {
        var fires = 0;
        var callback = () => fires += 1;
        queryList.onChange(callback);

        queryList.add('one');
        queryList.fireCallbacks();
        expect(fires).toEqual(1);

        queryList.removeCallback(callback);

        queryList.add('two');
        queryList.fireCallbacks();
        expect(fires).toEqual(1);
      });
    });
  });

开发者ID:goderbauer，项目名称:angular，代码行数:80，代码来源:query_list_spec.ts

示例2: it

 it('should support first and last', () => {
   queryList.add('one');
   queryList.add('two');
   queryList.add('three');
   expect(queryList.first).toEqual('one');
   expect(queryList.last).toEqual('three');
 });

开发者ID:goderbauer，项目名称:angular，代码行数:7，代码来源:query_list_spec.ts

示例3: it

 it('should support toString', () => {
   queryList.add('one');
   queryList.add('two');
   var listString = queryList.toString();
   expect(StringWrapper.contains(listString, 'one')).toBeTruthy();
   expect(StringWrapper.contains(listString, 'two')).toBeTruthy();
 });

开发者ID:lavinjj，项目名称:angular，代码行数:7，代码来源:query_list_spec.ts

注：本文中的angular2/src/core/compiler/query_list.QueryList类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。