[英]ts-jest: Import MockedObject type
如何將MockedObject
類型MockedObject
到我的測試文件中? 我的代碼示例如下
import { mocked, MockedObject } from 'ts-jest/utils';
import someFunction from '../src/common/someFunction';
import SomeClass from '../src/model/SomeClass';
import SomeInterface from '../src/interface/SomeInterface';
jest.mock('../src/model/SomeClass');
describe('run test', () => {
let mockValidators: any;
beforeAll(async () => {
mockedValidators = (await someFunction()).map((v: SomeInterface) =>
mocked(v)
):
}
})
我試圖從 ts-jest/utils 導入MockedObject
但 VSCode 找不到它。 我想用MockedObject<SomeInterface>
替換any
。
錯誤:
模塊“../../../node_modules/ts-jest/utils”沒有導出成員“MockedObject”。
從源代碼中,我們可以看到ts-jest/utils
不導出MockedObject
類型。 您可以從ts-jest/dist/util/testing.d.ts
文件中復制類型,將它們添加到您的項目中。
例如
index.test.ts
:
import { mocked } from 'ts-jest/utils';
interface SomeInterface {
validate(): boolean;
}
declare type MockableFunction = (...args: any[]) => any;
declare type MethodKeysOf<T> = {
[K in keyof T]: T[K] extends MockableFunction ? K : never;
}[keyof T];
declare type PropertyKeysOf<T> = {
[K in keyof T]: T[K] extends MockableFunction ? never : K;
}[keyof T];
declare type ArgumentsOf<T> = T extends (...args: infer A) => any ? A : never;
declare type ConstructorArgumentsOf<T> = T extends new (...args: infer A) => any ? A : never;
interface MockWithArgs<T extends MockableFunction> extends jest.MockInstance<ReturnType<T>, ArgumentsOf<T>> {
new (...args: ConstructorArgumentsOf<T>): T;
(...args: ArgumentsOf<T>): ReturnType<T>;
}
declare type MaybeMockedConstructor<T> = T extends new (...args: any[]) => infer R ? jest.MockInstance<R, ConstructorArgumentsOf<T>> : {};
declare type MockedFunction<T extends MockableFunction> = MockWithArgs<T> &
{
[K in keyof T]: T[K];
};
declare type MockedObject<T> = MaybeMockedConstructor<T> &
{
[K in MethodKeysOf<T>]: T[K] extends MockableFunction ? MockedFunction<T[K]> : T[K];
} &
{
[K in PropertyKeysOf<T>]: T[K];
};
const UserValidator: SomeInterface = {
validate: () => true,
};
async function someFunction() {
return [UserValidator];
}
describe('run test', () => {
let mockedValidators: Array<MockedObject<SomeInterface>>;
beforeAll(async () => {
mockedValidators = (await someFunction()).map((v: SomeInterface) => mocked(v));
});
});
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