不推荐使用角形6 ng皮棉组合测试

不推荐使用CombineTest:不再支持resultSelector,改为使用管道映射

以上警告建议删除您在CombineTest observable中提供的最后一个函数resultSelector,并将其作为map操作符的一部分提供,如下所示

const a$ = combineLatest(
  this.aStore.select(b.getAuth),
  this.cStore.select(b.getUrl)
);

const result$ = a$.pipe(
  map(results => ({auth: results[0], url: results[1]}))
)

更新时间:

如果你看到 combineLatest is deprecated: Pass arguments in a single array instead 然后只需添加[]:

const a$ = combineLatest([
  this.aStore.select(b.getAuth),
  this.cStore.select(b.getUrl)
]);
    
const result$ = a$.pipe(
  map(results => ({auth: results[0], url: results[1]}))
)

不幸的是,如果从运算符导入CombineTest,也可能会出现tslint错误:

import { combineLatest } from 'rxjs/operators';
    
combineLatest(...array);

而不是

import { combineLatest } from 'rxjs';
    
combineLatest(...array);

与不推荐的版本不同, combineLatest 接受 大堆 属于 Observable 并返回一个数组,其中包含每个数组中的最新值。每一条河流都必须屈服 组合测试 屈服。

fruitType$ = combineLatest([this.entity$, this.datasetStateService.get$('Fruits')])
  .pipe(map(data => {
    const entity = data[0];
    const dataset = data[1];
    return {
       isApple: (dataset.find(ds => ds.label === 'Apple') as DataItem).id === entity.fruitId,
       isOrange: (dataset.find(ds => ds.label === 'Orange') as DataItem).id === entity.fruitId
    }
}));

对于 trailing comma 错误,请删除后面的逗号 (auth, url) => ({auth, url})

const a$ = combineLatest(
  this.aStore.select(b.getAuth),
  this.cStore.select(b.getUrl),
  (auth, url) => ({auth, url}),  // Remove this comma.
);

对于 missing import 错误,请确保已导入文件中使用的所有外部var或类。

例如,在本例中,如果尚未导入 combineLatest ,然后导入

import { combineLatest } from 'rxjs'; // For RxJS 6.x

import { combineLatest } from 'rxjs/operators'; // For RxJS 5.x

在我的例子中,这是因为我显式设置了泛型参数,所以 combineLatest 已选择过载。为了摆脱警告,我改了

combineLatest<void>([
    firstObservable$,
    secondObservable$
]);

到

combineLatest([
    firstObservable$,
    secondObservable$
]).pipe(
    mapTo(undefined)
);

我会这样解决:

auth$ = this.aStore.select(b.getAuth);
url$ = this.cStore.select(b.getUrl);

combinedResult$ = combineLatest([this.auth$, this.url$]).pipe(
    map(([auth, url]) => ({auth, url}))
)

此错误也可能是由于传入 Subscription 项目,而不是实际观察到的,哈哈。(我在这一点上真的很马虎。)

错误的

const foo = Foo$.subscribe(f => {
  // do something with f here
})

const bar = Bar$.subscribe(b => {
  // do something with b here
})

combineLatest([foo, bar]).subscribe(([f, b]) => {
  // do something after both foo$ and bar$ have emitted something
})

对的

const foo$ = Foo$.pipe(
  tap(f => {
    // do something with f here
  })
)

const bar$ = Bar$.pipe(
  tap(b => {
    // do something with b here
  })
)

combineLatest([foo$, bar$]).subscribe(([f, b]) => {
  // do something after both Foo$ and Bar$ have emitted something
})

我用去润滑的CombineTest来组合这两个观测值。路线paramMap+此。路线查询参数映射:

combineLatest(this.route.paramMap, this.route.queryParamMap)
  .subscribe(combined => {
    const idFollower = combined[0].get('id');
    const page = combined[1].get('page');
  })