玩笑中模拟重载方法?"/>
如何在玩笑中模拟重载方法?
我正在使用jsonwebtoken库来验证模块中的令牌。 jsonwebtoken导出验证方法多次(重载)。
export function verify(token: string, secretOrPublicKey: Secret, options?: VerifyOptions): object | string;
export function verify(
token: string,
secretOrPublicKey: Secret | GetPublicKeyOrSecret,
callback?: VerifyCallback,
): void;
export function verify(
token: string,
secretOrPublicKey: Secret | GetPublicKeyOrSecret,
options?: VerifyOptions,
callback?: VerifyCallback,
): void;
我的模块:
private validateToken(token: string): void {
const publicKeyToPem = this.convertPublicKeyToPEM(this.ssoPublicKey);
try {
this.decodedToken = jwt.verify(token, publicKeyToPem);
} catch (e) {
throw new Error(e);
}
}
我试图在单元测试中模拟验证方法。
test('should return true if token is correct', () => {
const verifyResponse = { 'test': 'test' };
jest.spyOn(jwt, 'verify').mockReturnValue(verifyResponse);
........
});
我收到以下错误:'{test类型的参数:字符串; }'不可分配给'void'类型的参数。ts(2345)似乎使用了最后一个导出方法(验证),并且它返回void。我尝试使用jest.spyOn(jwt, 'verify').mockImplementationOnce(() => verifyResponse);
似乎很好,但是如何模拟特定的重载方法?
代替jest.spyOn
,您应该像这样使用jest.mock
const jwt = require('jwt-library');
const myMod = require('./myModule');
// it will replace all of the methods with jest.fn()
jest.mock('jwt-library')
describe('my module', () => {
const mockDecodedToken = { 'test': 'test' };
describe('calling a public method that calls validateToken', () => {
beforeAll(() => {
jwt.verify.mockReturnValue(mockDecodedToken);
myMod.aPublicMethodThatCallsValidateToken()
})
it('should have called jwt.verify', () => {
expect(jwt.verify).toHaveBeenCalledWith(
expect.any(String)
expect.any(Secret)
expect.any(VerifyOptions)
)
})
it('should have assigned decodedToken to my module', () => {
expect(myMod).toHaveProperty(decodedToken, mockDecodedToken)
});
})
})
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如何在玩笑中模拟重载方法?
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