I am attempting to run a fail case test for this TypeScript function using Sinon, however, I am unsure how to proceed. Can anyone provide assistance?
public async findById(id: number): Promise<UserModel> {
const user = await this._userModel.findByPk(id);
if (!user) throw new NotFound('User not found');
return user;
}
Successfully solved the problem and successfully developed a unit and integration test:
Integration Test:
it('should fail to find user by id', async function () {
Sinon.stub(Model, 'findByPk').resolves(null);
const response = await chai.request(app).get('/users/999').send({
params: 999,
});
expect(response.status).to.equal(404);
});
Unit Test:
it('should fail to find user by id', async function () {
sinon.stub(Model, 'findByPk').resolves(null);
try {
await userService.findById(999);
} catch (e) {
const error = e as Error;
expect(error).to.be.instanceOf(NotFound);
expect(error.message).to.equal('User not found');
}
});
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