28 lines
1.3 KiB
TypeScript
28 lines
1.3 KiB
TypeScript
import { describe, test, expect } from "vitest";
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import { decorationPlan } from "../src/trackChangesModel";
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describe("decorationPlan (INV-49)", () => {
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test("derives insertion ranges + deletion hints from original→replacement", () => {
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// anchorStart 10; original 'the brown fox' → 'the red fox'
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const plan = decorationPlan(10, "the brown fox", "the red fox");
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// one changed run: 'brown ' → 'red ' (word-level); insertion 'red ' tinted,
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// deletion hint 'brown ' shown at the run start.
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expect(plan.insertions.length).toBeGreaterThan(0);
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expect(plan.deletions.length).toBeGreaterThan(0);
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// insertion offsets are in buffer coords (>= anchorStart) and lie within the applied text
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for (const ins of plan.insertions) {
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expect(ins.start).toBeGreaterThanOrEqual(10);
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expect(ins.end).toBeLessThanOrEqual(10 + "the red fox".length);
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}
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// a deletion hint carries the struck original text at a buffer offset
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expect(plan.deletions[0].text).toContain("brown");
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});
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test("pure insertion (no deletion) yields an insertion range and no deletion hint", () => {
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// 'hello' → 'hello world': ' world' is a pure word-level insertion (no removed tokens)
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const plan = decorationPlan(0, "hello", "hello world");
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expect(plan.insertions.length).toBe(1);
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expect(plan.deletions.length).toBe(0);
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});
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});
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