55 lines
2.1 KiB
TypeScript
55 lines
2.1 KiB
TypeScript
import type { ClientState, TestDefinition } from "../test-definition";
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import { assert } from "../utils/assert";
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function verifyNoDuplicates(state: ClientState): void {
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assert(
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state.files.size === 1,
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`Expected exactly 1 file, got ${state.files.size}: ${Array.from(state.files.keys()).join(", ")}`
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);
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assert(
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state.files.has("doc.md"),
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`Expected doc.md to exist, got: ${Array.from(state.files.keys()).join(", ")}`
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);
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const content = state.files.get("doc.md") ?? "";
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assert(
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content === "important data",
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`Expected doc.md content to be "important data", got: "${content}"`
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);
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}
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export const idempotencyAfterServerPauseTest: TestDefinition = {
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name: "Idempotency Key Prevents Duplicates After Server Pause",
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description:
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"Client 0 creates a file. The server is paused mid-response (SIGSTOP), " +
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"so the client's HTTP request stalls. When the server resumes, the " +
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"idempotency key should prevent duplicate documents from being created. " +
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"Both clients must converge to a single copy of the file.",
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clients: 2,
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steps: [
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// Both clients online
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{ type: "enable-sync", client: 0 },
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{ type: "enable-sync", client: 1 },
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{ type: "sync" },
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{ type: "barrier" },
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// Client 0 creates a file, then immediately pause the server so the
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// response is stalled (the server may or may not have committed the
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// create — either way the idempotency key protects us).
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{ type: "create", client: 0, path: "doc.md", content: "important data" },
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{ type: "pause-server" },
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// Wait with server frozen — client's in-flight create request is stuck.
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// Resume the server. The stalled request completes (or the client
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// retries with the same idempotency key).
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{ type: "resume-server" },
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// Sync and converge
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{ type: "sync" },
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{ type: "barrier" },
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// There must be exactly one doc.md with the correct content — no
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// duplicates like "doc (1).md".
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{ type: "assert-consistent", verify: verifyNoDuplicates }
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]
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};
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