59 lines
2 KiB
TypeScript
59 lines
2 KiB
TypeScript
import type { ClientState, TestDefinition } from "../test-definition";
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import { assert } from "../utils/assert";
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/**
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* BUG FIX: migrateKey must not overwrite existing state at the new key.
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*
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* Scenario:
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* 1. Client 0 creates file A.md, then immediately updates it
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* 2. Server is paused so the create stalls (idempotency key unresolved)
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* 3. Client 1 is online and also creates at A.md (different content)
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* 4. Server resumes — both creates merge
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* 5. Client 0's update should not be lost during key migration
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*
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* The test verifies that after convergence, the file exists with
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* content from both clients' edits.
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*/
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function verifyContent(state: ClientState): void {
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assert(state.files.size === 1, `Expected 1 file, got ${state.files.size}`);
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assert(state.files.has("A.md"), "Expected A.md to exist");
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const content = state.files.get("A.md") ?? "";
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// Client 0's update should be present
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assert(
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content.includes("updated by client 0"),
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`Expected content to include "updated by client 0", got: "${content}"`
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);
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}
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export const migrateKeyPreservesExistingTest: TestDefinition = {
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name: "Key Migration Preserves Existing Queue State",
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description:
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"When migrateKey is called and the new key already has queued " +
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"events, the existing events must not be silently dropped.",
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clients: 2,
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steps: [
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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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// Pause server so create stalls
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{ type: "pause-server" },
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// Client 0 creates and immediately updates
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{ type: "create", client: 0, path: "A.md", content: "initial" },
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{
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type: "update",
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client: 0,
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path: "A.md",
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content: "updated by client 0"
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},
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// Resume server
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{ type: "resume-server" },
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{ type: "sync" },
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{ type: "barrier" },
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{ type: "assert-consistent", verify: verifyContent }
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]
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};
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