cache/__tests__/cacheHttpsClient.test.ts
2020-05-12 16:16:48 -04:00

144 lines
3.1 KiB
TypeScript

import { retry } from "../src/cacheHttpClient";
import * as testUtils from "../src/utils/testUtils";
afterEach(() => {
testUtils.clearInputs();
});
interface TestResponse {
statusCode: number;
result: string | null;
}
function handleResponse(
response: TestResponse | undefined
): Promise<TestResponse> {
if (!response) {
fail("Retry method called too many times");
}
if (response.statusCode === 999) {
throw Error("Test Error");
} else {
return Promise.resolve(response);
}
}
async function testRetryExpectingResult(
responses: Array<TestResponse>,
expectedResult: string | null
): Promise<void> {
responses = responses.reverse(); // Reverse responses since we pop from end
const actualResult = await retry(
"test",
() => handleResponse(responses.pop()),
(response: TestResponse) => response.statusCode
);
expect(actualResult.result).toEqual(expectedResult);
}
async function testRetryExpectingError(
responses: Array<TestResponse>
): Promise<void> {
responses = responses.reverse(); // Reverse responses since we pop from end
expect(
retry(
"test",
() => handleResponse(responses.pop()),
(response: TestResponse) => response.statusCode
)
).rejects.toBeInstanceOf(Error);
}
test("retry works on successful response", async () => {
await testRetryExpectingResult(
[
{
statusCode: 200,
result: "Ok"
}
],
"Ok"
);
});
test("retry works after retryable status code", async () => {
await testRetryExpectingResult(
[
{
statusCode: 503,
result: null
},
{
statusCode: 200,
result: "Ok"
}
],
"Ok"
);
});
test("retry fails after exhausting retries", async () => {
await testRetryExpectingError([
{
statusCode: 503,
result: null
},
{
statusCode: 503,
result: null
},
{
statusCode: 200,
result: "Ok"
}
]);
});
test("retry fails after non-retryable status code", async () => {
await testRetryExpectingError([
{
statusCode: 500,
result: null
},
{
statusCode: 200,
result: "Ok"
}
]);
});
test("retry works after error", async () => {
await testRetryExpectingResult(
[
{
statusCode: 999,
result: null
},
{
statusCode: 200,
result: "Ok"
}
],
"Ok"
);
});
test("retry returns after client error", async () => {
await testRetryExpectingResult(
[
{
statusCode: 400,
result: null
},
{
statusCode: 200,
result: "Ok"
}
],
null
);
});