TypeScript angular2-meteor.ObservableCursor类代码示例

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› TypeScript›TypeScript教程

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了TypeScript中angular2-meteor.ObservableCursor类的典型用法代码示例。如果您正苦于以下问题：TypeScript ObservableCursor类的具体用法？TypeScript ObservableCursor怎么用？TypeScript ObservableCursor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ObservableCursor类的2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('toObservable', function() {
  let collection : Mongo.Collection;
  let cursor : Mongo.Cursor;
  let observable : ObservableCursor;

  beforeEach(function() {
    collection = new Mongo.Collection(null);
    collection.allow({
      insert: function () {
        return true;
      },
      update: function () {
        return true;
      },
      remove: function () {
        return true;
      }
    });

    cursor = collection.find({});
    observable = toObservable(cursor);
  });

  it ("Should wrap the Mongo.Cursor and return RxJS Observable", function() {
    expect(observable instanceof Observable).to.equal(true);
  });

  it ("Should not use the actual Cursor 'observe' method without Observable subscription", function() {
    let spy = sinon.spy(cursor, "observe");
    expect(spy.called).to.equal(false);
    spy.restore();
  });

  it ("Should use the actual Cursor 'observe' after using Observable subscription", function() {
    let spy = sinon.spy(cursor, "observe");
    let subscriptionHandler = observable.subscribe(() => {});
    expect(spy.calledOnce).to.equal(true);
    spy.restore();
    subscriptionHandler.unsubscribe();
  });

  it ("Should not trigger subscription callback when creating the subscription", function() {
    let spy = sinon.spy();
    let subscriptionHandler = observable.subscribe(spy);
    expect(spy.called).to.equal(false);
    subscriptionHandler.unsubscribe();
  });

  it ("Should trigger subscription callback when adding data to the collection", function() {
    let spy = sinon.spy();
    let subscriptionHandler = observable.subscribe(spy);
    collection.insert({test: true});
    expect(spy.calledOnce).to.equal(true);
    subscriptionHandler.unsubscribe();
  });

  it ("Should trigger subscription callback when removing data to the collection", function() {
    let spy = sinon.spy();
    let subscriptionHandler = observable.subscribe(spy);

    let idToRemove = collection.insert({test: true});
    collection.remove(idToRemove);

    expect(spy.callCount).to.equal(2);
    subscriptionHandler.unsubscribe();
  });

  it ("Should trigger subscription callback when updating data on the collection", function() {
    let spy = sinon.spy();
    let subscriptionHandler = observable.subscribe(spy);

    let idToUpdate = collection.insert({test: true});
    collection.update({_id: idToUpdate}, {$set: {test: false}});

    expect(spy.callCount).to.equal(2);
    subscriptionHandler.unsubscribe();
  });

  it ("Should trigger the subscription callback multiple times when inserting multiple objects", function() {
    let spy = sinon.spy();
    let subscriptionHandler = observable.subscribe(spy);

    collection.insert({test: 1});
    collection.insert({test: 2});
    collection.insert({test: 3});

    expect(spy.callCount).to.equal(3);
    subscriptionHandler.unsubscribe();
  });

  it ("Should NOT trigger the subscription callback when trying to update non-existing object", function() {
    let spy = sinon.spy();
    let subscriptionHandler = observable.subscribe(spy);

    collection.insert({test: 1});
    collection.update({test: 'B'}, {$set: {test: 'C'}});

    expect(spy.callCount).to.equal(1);
    subscriptionHandler.unsubscribe();
  });
//.........这里部分代码省略.........

开发者ID:DAB0mB，项目名称:angular2-meteor，代码行数:101，代码来源:to-observable.spec.ts

示例2: it

 it ("Should trigger subscription callback when adding data to the collection", function() {
   let spy = sinon.spy();
   let subscriptionHandler = observable.subscribe(spy);
   collection.insert({test: true});
   expect(spy.calledOnce).to.equal(true);
   subscriptionHandler.unsubscribe();
 });

开发者ID:DAB0mB，项目名称:angular2-meteor，代码行数:7，代码来源:to-observable.spec.ts

注：本文中的angular2-meteor.ObservableCursor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。