1import { describe, expect, it } from "vite-plus/test";
2
3import { parseTurnDiffFilesFromNumstat } from "./Diffs.ts";
4
5describe("parseTurnDiffFilesFromNumstat", () => {
6 it("returns an empty list when no files changed", () => {
7 expect(parseTurnDiffFilesFromNumstat("")).toEqual([]);
8 });
9
10 it("sorts files and preserves addition and deletion counts", () => {
11 const numstat = ["0\t2\tsrc/b.ts", "2\t1\ta.txt", ""].join("\0");
12 expect(parseTurnDiffFilesFromNumstat(numstat)).toEqual([
13 { path: "a.txt", additions: 2, deletions: 1 },
14 { path: "src/b.ts", additions: 0, deletions: 2 },
15 ]);
16 });
17
18 it("preserves both paths for renames and copies", () => {
19 const numstat = [
20 "0\t0\t",
21 "src/old.ts",
22 "src/new.ts",
23 "2\t1\t",
24 "src/source.ts",
25 "src/copied.ts",
26 "1\t0\tother.ts",
27 "",
28 ].join("\0");
29
30 expect(parseTurnDiffFilesFromNumstat(numstat)).toEqual([
31 { path: "other.ts", additions: 1, deletions: 0 },
32 { path: "src/copied.ts", previousPath: "src/source.ts", additions: 2, deletions: 1 },
33 { path: "src/new.ts", previousPath: "src/old.ts", additions: 0, deletions: 0 },
34 ]);
35 });
36
37 it("keeps binary files and empty files with zero line changes", () => {
38 const numstat = ["-\t-\timage.png", "0\t0\tempty.txt", ""].join("\0");
39 expect(parseTurnDiffFilesFromNumstat(numstat)).toEqual([
40 { path: "empty.txt", additions: 0, deletions: 0 },
41 { path: "image.png", additions: 0, deletions: 0 },
42 ]);
43 });
44
45 it("preserves Unicode, tabs, line endings, and spaces in paths", () => {
46 const path = " café\tline\r\nname.txt ";
47 const numstat = `3\t2\t\0old\tname\n.txt\0${path}\0`;
48
49 expect(parseTurnDiffFilesFromNumstat(numstat)).toEqual([
50 { path, previousPath: "old\tname\n.txt", additions: 3, deletions: 2 },
51 ]);
52 expect(parseTurnDiffFilesFromNumstat(`1\t0\t${path}\0`)).toEqual([
53 { path, additions: 1, deletions: 0 },
54 ]);
55 });
56});