48 lines
1.4 KiB
TypeScript
48 lines
1.4 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import {
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calculateBackoff,
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parseRetryAfter,
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retryDelay,
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shouldRetry,
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} from "../../src/adapters/http/retry-policy.ts";
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describe("HTTP retry policy", () => {
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it("uses capped exponential full jitter", () => {
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expect(calculateBackoff(0, () => 0.5)).toBe(125);
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expect(calculateBackoff(8, () => 1)).toBe(2_000);
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});
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it("parses retry-after and chooses the longer bounded delay", () => {
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expect(parseRetryAfter("2", 0)).toBe(2_000);
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expect(retryDelay({ kind: "RATE_LIMITED", retryAfterMs: 500 }, 0, () => 0)).toBe(
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500,
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);
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});
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it("allows at most two retries for safe or keyed requests", () => {
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const failure = { kind: "SERVER_FAILURE" };
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expect(shouldRetry({ idempotency: "safe" }, failure, 0)).toBe(true);
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expect(shouldRetry({ idempotency: "keyed" }, failure, 1)).toBe(true);
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expect(shouldRetry({ idempotency: "safe" }, failure, 2)).toBe(false);
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expect(shouldRetry({ idempotency: "none" }, failure, 0)).toBe(false);
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expect(
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shouldRetry(
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{ idempotency: "safe" },
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{ kind: "SERVER_FAILURE", httpStatus: 500 },
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0,
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),
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).toBe(false);
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});
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it("does not automatically wait beyond 30 seconds", () => {
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expect(
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shouldRetry(
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{ idempotency: "safe" },
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{ kind: "RATE_LIMITED", retryAfterMs: 31_000 },
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0,
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),
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).toBe(false);
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});
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});
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