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TypeScript
1234567891011121314151617import assert from "node:assert/strict"import test from "node:test"import stringWidth from "string-width"import { stripVTControlCharacters as strip } from "node:util"import { renderDiff } from "./diff.js"
test("rich diff keeps numbered colored blocks at terminal width, wrapping long changes", () => { const rows = renderDiff(`@@ -7,2 +7,3 @@\n context\n-old\n+const value = ${"wide 界".repeat(4)}\n+extra`, "file.ts", 24) assert(rows.every(row => stringWidth(row) === 24)) assert(rows.some(row => row.includes("\x1b[48;2;24;53;39m"))) assert(rows.some(row => row.includes("\x1b[48;2;59;35;40m"))) assert(rows.map(strip).some(row => row.includes(" 8 - old"))) assert(rows.map(strip).some(row => row.includes(" 9 + extra"))) assert(rows.length > 6) assert.deepEqual(renderDiff("@@ -1 +1 @@\n-old\n+new", "file", 1), ["…"])})