typescript - 单元测试返回或使用 promise 的 ionic 函数 - TS2304 : Cannot find name 'done' - Jasmine/Karma for unit testing ionic apps

Question

我正在尝试使用模拟存储对一个简单的数据访问函数进行单元测试，该存储仅使用内存中的字典。

当我尝试使用 done() 函数时，出现错误:TS2304: Cannot find name 'done' 尽管 jasmine 和 karma 似乎已正确安装。

我所做的事情尚未解决此问题:

1. 经过验证的 Jasmine 位于packages.json
2. 添加了 **/*.spec.ts 以排除 tsconfig.json 部分？
3. 将 tsconfig.json 中的目标从“e5”更改为“e6”

数据.ts:

export class DataProvider {
  private foo;
  public readonly fooKey
  public getFoo() { return this.foo; }
  public setFoo(bar: number) {
        this.foo = bar;
        this.storage.ready().then(() => {
            this.storage.set(this.fooKey, JSON.stringify(this.foo));
        });
    }
}

数据.spec.ts:

include StorageMock;
include DataProvider;

 it('should have correct values after loading data',
       function() {
           comp.storage.set(comp.fooKey, JSON.stringify(0.1234));
           comp.storage.get(comp.fooKey).then(result => {
               expect(JSON.parse(result)).toEqual(0.1234);
               done(); // Error - TS2304: Cannot find name 'done'
           });
});

存储模拟:

export class StorageMock {
    private internal = [];

    public driver(): any {
        return '';
    }

    public ready(): Promise<any> {
        return new Promise(function(resolve: Function): void {
            resolve({});
        });
    }

    public get(key: string): Promise<any> {
        let getval = this.internal[key];
        return new Promise(function(resolve: Function): void {
            resolve(getval);
        });
    }

    public set(key: string, value: any): Promise<any> {
        this.internal.push({key : value});
        return new Promise(function(resolve: Function): void {
            resolve();
        });
    }

    public remove(key: string): Promise<any> {
        let index = this.internal.indexOf(key);
        if(index !== -1) {
            this.internal.splice(index,1);
        }
        return new Promise(function(resolve: Function): void {
            resolve();
        });
    }

    public clear(): Promise<any> {
        this.internal = [];
        return new Promise(function(resolve: Function): void {
            resolve();
        });
    }

    public length(): Promise<any> {
        let length = this.internal.length;
        return new Promise(function(resolve: Function): void {
            resolve(length);
        });
    }

    public keys(): Promise<any> {
        let keys = Object.keys(this.internal);
        return new Promise(function(resolve: Function): void {
            resolve(keys);
        });
    }

    public forEach(i: any): Promise<any> {
        return new Promise(function(resolve: Function): void {
            resolve();
        });
    }

Answer 1

实际答案:

done 不是 Jasmine 框架一部分的函数，而是在测试声明中用作测试完成时的回调。请注意下面的 (done) 声明:

it("should test something async", (done) => {
 ...do the testing...
 done();
}

原答案:

虽然我不确定为什么不能使用 done()，但似乎使用 fakeAsync、flushMicrotasks、tick 可以“完成”工作“(我仍然遇到存储模拟的一些异步问题)。