| 1 | import assert from "node:assert/strict"; |
| 2 | import { test } from "node:test"; |
| 3 | |
| 4 | import type { FileDiff } from "@g1t/contracts"; |
| 5 | |
| 6 | import { diffContent, htmlOfFile, withHtml } from "./diff.ts"; |
| 7 | import { highlightFile } from "./shiki.ts"; |
| 8 | |
| 9 | const FILE: FileDiff = { |
| 10 | path: "src/lib.rs", |
| 11 | status: "modified", |
| 12 | additions: 2, |
| 13 | deletions: 1, |
| 14 | binary: false, |
| 15 | hunks: [ |
| 16 | { |
| 17 | lines: [ |
| 18 | { kind: "context", old: 1, new: 1, text: "fn main() {" }, |
| 19 | { kind: "delete", old: 2, new: null, text: ' println!("old");' }, |
| 20 | { kind: "add", old: null, new: 2, text: ' println!("new");' }, |
| 21 | { kind: "add", old: null, new: 3, text: "" }, |
| 22 | { kind: "context", old: 3, new: 4, text: "}" }, |
| 23 | ], |
| 24 | }, |
| 25 | { lines: [{ kind: "add", old: null, new: 10, text: "// end" }] }, |
| 26 | ], |
| 27 | }; |
| 28 | |
| 29 | test("a highlighted file's HTML, kept apart and given back, is the same highlighted file", async () => { |
| 30 | const highlighted = await highlightFile(FILE); |
| 31 | assert.ok(highlighted); |
| 32 | const html = htmlOfFile(highlighted); |
| 33 | assert.equal(html.length, 2); |
| 34 | assert.ok(html[0]!.every((row) => row !== null)); |
| 35 | // Through the data centre's cache it travels as JSON. |
| 36 | const kept = JSON.parse(JSON.stringify(html)); |
| 37 | assert.deepEqual(withHtml(FILE, kept), highlighted); |
| 38 | }); |
| 39 | |
| 40 | test("lines without HTML stay without it", () => { |
| 41 | const html = [[null, "<b>x</b>", null, "", null], [null]]; |
| 42 | const file = withHtml(FILE, html); |
| 43 | assert.equal("html" in file.hunks[0]!.lines[0]!, false); |
| 44 | assert.equal(file.hunks[0]!.lines[1]!.html, "<b>x</b>"); |
| 45 | // An empty line's HTML is kept: it is not the same as none. |
| 46 | assert.equal(file.hunks[0]!.lines[3]!.html, ""); |
| 47 | assert.equal("html" in file.hunks[1]!.lines[0]!, false); |
| 48 | // The diff given in is not changed. |
| 49 | assert.equal("html" in FILE.hunks[0]!.lines[1]!, false); |
| 50 | }); |
| 51 | |
| 52 | test("what a file's colours depend on: each line's side and text, not its numbers or path", () => { |
| 53 | const moved: FileDiff = { |
| 54 | ...FILE, |
| 55 | path: "other/lib.rs", |
| 56 | hunks: FILE.hunks.map((hunk) => ({ lines: hunk.lines.map((line) => ({ ...line, old: 99, new: 99 })) })), |
| 57 | }; |
| 58 | assert.equal(diffContent(moved), diffContent(FILE)); |
| 59 | const sideChanged: FileDiff = { |
| 60 | ...FILE, |
| 61 | hunks: [{ lines: FILE.hunks[0]!.lines.map((line, n) => (n === 0 ? { ...line, kind: "add" as const } : line)) }, FILE.hunks[1]!], |
| 62 | }; |
| 63 | assert.notEqual(diffContent(sideChanged), diffContent(FILE)); |
| 64 | // A line split differently is different content. |
| 65 | const one: FileDiff = { ...FILE, hunks: [{ lines: [{ kind: "add", old: null, new: 1, text: "a\nb" }] }] }; |
| 66 | const two: FileDiff = { |
| 67 | ...FILE, |
| 68 | hunks: [{ lines: [{ kind: "add", old: null, new: 1, text: "a" }, { kind: "add", old: null, new: 2, text: "b" }] }], |
| 69 | }; |
| 70 | assert.notEqual(diffContent(one), diffContent(two)); |
| 71 | }); |