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* @license
* Copyright 2019 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { expect } from 'chai';
import { SinonStub, stub } from 'sinon';
import '../testing/setup';
import { retryIfServerError } from './common';
describe('common', () => {
describe('retryIfServerError', () => {
let fetchStub: SinonStub<[], Promise<Response>>;
beforeEach(() => {
fetchStub = stub();
});
it('retries once if the server returns a 5xx error', async () => {
const expectedResponse = new Response();
fetchStub.onCall(0).resolves(new Response(null, { status: 500 }));
fetchStub.onCall(1).resolves(expectedResponse);
await expect(retryIfServerError(fetchStub)).to.eventually.equal(
expectedResponse
);
expect(fetchStub).to.be.calledTwice;
});
it('does not retry again if the server returns a 5xx error twice', async () => {
const expectedResponse = new Response(null, { status: 500 });
fetchStub.onCall(0).resolves(new Response(null, { status: 500 }));
fetchStub.onCall(1).resolves(expectedResponse);
fetchStub.onCall(2).resolves(new Response());
await expect(retryIfServerError(fetchStub)).to.eventually.equal(
expectedResponse
);
expect(fetchStub).to.be.calledTwice;
});
it('does not retry if the error is not 5xx', async () => {
const expectedResponse = new Response(null, { status: 404 });
fetchStub.resolves(expectedResponse);
await expect(retryIfServerError(fetchStub)).to.eventually.equal(
expectedResponse
);
expect(fetchStub).to.be.calledOnce;
});
it('does not retry if response is ok', async () => {
const expectedResponse = new Response();
fetchStub.resolves(expectedResponse);
await expect(retryIfServerError(fetchStub)).to.eventually.equal(
expectedResponse
);
expect(fetchStub).to.be.calledOnce;
});
});
});
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