Zhentiw - 博客园

2022年10月17日

摘要： Implement the type version of Array.shift For example type Result = Shift<[3, 2, 1]> // [2, 1] /* _____________ Your Code Here _____________ */ type S 阅读全文

posted @ 2022-10-17 14:41 Zhentiw 阅读(26) 评论(0) 推荐(0)

[Unit testing RxJS] Testing Observables with Subscribe and assert Parttern

摘要： const { of } = require("rxjs"); const { mergeMap, map, delay, catchError } = require("rxjs/operators"); describe("subscribe & assert testing in RxJS", 阅读全文

posted @ 2022-10-17 14:12 Zhentiw 阅读(32) 评论(0) 推荐(0)

2022年10月16日

[Typescript] 52. Medium - ObjectEntries

摘要： Implement the type version of Object.entries For example interface Model { name: string; age: number; locations: string[] | null; } type modelEntries 阅读全文

posted @ 2022-10-16 17:08 Zhentiw 阅读(23) 评论(0) 推荐(0)

2022年10月15日

[Typescript] 51. Medium - Mutable

摘要： Implement the generic Mutable<T> which makes all properties in T mutable (not readonly). For example interface Todo { readonly title: string readonly 阅读全文

posted @ 2022-10-15 20:36 Zhentiw 阅读(24) 评论(0) 推荐(0)

[Typescript] Tips: Turn a module into a type

摘要： Want to turn a module into a type? You can use typeof import('./') to grab the type of any module, even third-party ones. Here, we create a type from 阅读全文

posted @ 2022-10-15 20:27 Zhentiw 阅读(34) 评论(0) 推荐(0)

2022年10月14日

[Unit testing RxJS] Test complex logic with time progression syntax

摘要： For example we have a search input: const input$ = fromEvent(document.getElementById("#input"), "input"); input$ .pipe( debounceTime(200), pluck("targ 阅读全文

posted @ 2022-10-14 20:56 Zhentiw 阅读(86) 评论(0) 推荐(0)

[Unit testing RxJS] Overview: Testing Observables with Marble Testing

摘要： const { TestScheduler } = require("rxjs/testing"); const { map, take, delay, mapTo, catchError } = require("rxjs/operators"); const { concat, from, of 阅读全文

posted @ 2022-10-14 20:24 Zhentiw 阅读(44) 评论(0) 推荐(0)

[Unit testing RxJS] Force completion for long running observables with marbles

摘要： describe("Marble testing in Rxjs", () => { let testScheduler; beforeEach(() => { testScheduler = new TestScheduler((actual, expected) => { expect(actu 阅读全文

posted @ 2022-10-14 20:20 Zhentiw 阅读(21) 评论(0) 推荐(0)

[Unit testing RxJS] Test error handling with marbles

摘要： const { TestScheduler } = require("rxjs/testing"); const { map, take, delay, mapTo, catchError } = require("rxjs/operators"); const { concat, from, of 阅读全文

posted @ 2022-10-14 19:35 Zhentiw 阅读(34) 评论(0) 推荐(0)

[Typescript] 50. Medium - RequiredByKeys

摘要： Implement a generic RequiredByKeys<T, K> which takes two type argument T and K. K specify the set of properties of T that should set to be required. W 阅读全文

posted @ 2022-10-14 19:14 Zhentiw 阅读(19) 评论(0) 推荐(0)

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