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https://github.com/badlogic/pi-mono.git
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d5cba1d97c
Replace the alternate tracker implementations with the optimized immutable overlay, validate draft placements as strict JSON, and document the ownership contract. Consolidate tracker tests and benchmarks around the canonical implementation.
37 lines
1.5 KiB
TypeScript
37 lines
1.5 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import { track } from "../src/delta/index.ts";
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describe("immutable revision ownership", () => {
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it("takes ownership of an alias-free mutable JSON root without freezing", () => {
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const input = { left: { value: 1 }, right: { value: 1 } };
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const tracker = track(input);
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expect(tracker.value).toBe(input);
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expect(tracker.value.left).not.toBe(tracker.value.right);
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expect(Object.isFrozen(tracker.value)).toBe(false);
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expect(Object.isFrozen(tracker.value.left)).toBe(false);
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});
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it("commits transaction copies in place while sharing unchanged branches", () => {
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const tracker = track({ changed: { value: 1 }, retained: { value: 2 } });
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const base = tracker.value;
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const baseSnapshot = structuredClone(base);
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const change = tracker.beginChange();
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change.state.changed.value = 3;
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const prepared = change.prepare();
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expect(prepared.value.changed).not.toBe(base.changed);
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expect(prepared.value.retained).toBe(base.retained);
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expect(Object.isFrozen(prepared.value.changed)).toBe(false);
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tracker.adopt(prepared);
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expect(base).toEqual(baseSnapshot);
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expect(tracker.value).toBe(prepared.value);
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});
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it("makes repeated placements independent", () => {
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const tracker = track({ values: [] as { value: number }[] });
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const change = tracker.beginChange();
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const shared = { value: 1 };
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change.state.values.push(shared, shared);
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const prepared = change.prepare();
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expect(prepared.value.values[0]).not.toBe(prepared.value.values[1]);
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});
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});
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