import { describe, it, expect } from "vitest";import {  formatBytes,  parseSize,  formatBytesPerSec,  formatCount,  formatRelative,  formatEtaShort,  cleanText,  stripControl,  truncate,} from "./format"; describe("formatBytes", () => {  it("formats across units", () => {    expect(formatBytes(0)).toBe("0 B");    expect(formatBytes(933)).toBe("933 B");    expect(formatBytes(1024)).toBe("1.00 KB");    expect(formatBytes(2.1e9)).toBe("1.96 GB");    expect(formatBytes(undefined)).toBe("0 B");  });}); describe("parseSize", () => {  it("parses human sizes to bytes", () => {    expect(parseSize("1.4 GiB")).toBe(Math.round(1.4 * 1024 ** 3));    expect(parseSize("700 MB")).toBe(700_000_000);    expect(parseSize("350.2 MiB")).toBe(Math.round(350.2 * 1024 ** 2));    expect(parseSize("nothing here")).toBe(0);  });}); describe("formatBytesPerSec", () => {  it("formats rates and blanks zero", () => {    expect(formatBytesPerSec(0)).toBe("");    expect(formatBytesPerSec(5.2e6)).toMatch(/MB\/s$/);  });}); describe("formatCount", () => {  it("passes small counts through untouched", () => {    expect(formatCount(0)).toBe("0");    expect(formatCount(742)).toBe("742");    expect(formatCount(9999)).toBe("9999");  });   it("compacts large counts to k/m", () => {    expect(formatCount(11500)).toBe("12k");    expect(formatCount(10639)).toBe("11k");    expect(formatCount(999_400)).toBe("999k");    expect(formatCount(999_600)).toBe("1m");    expect(formatCount(1_500_000)).toBe("1.5m");    expect(formatCount(12_000_000)).toBe("12m");  });   it("never exceeds 4 characters so seed:leech fits its column", () => {    for (const n of [9999, 10_000, 99_499, 999_499, 999_999, 9_949_999, 999_000_000]) {      expect(formatCount(n).length).toBeLessThanOrEqual(4);    }  });}); describe("formatRelative", () => {  it("describes recent times", () => {    const now = Date.now() / 1000;    expect(formatRelative(now - 30)).toBe("now");    expect(formatRelative(now - 125)).toBe("2m ago");    expect(formatRelative(0)).toBe("");  });}); describe("formatEtaShort", () => {  it("formats remaining time compactly", () => {    expect(formatEtaShort(45)).toBe("45s");    expect(formatEtaShort(125)).toBe("2m 5s");    expect(formatEtaShort(3725)).toBe("1hr 2m");    expect(formatEtaShort(90061)).toBe("1d 1hr 1m");    expect(formatEtaShort(undefined)).toBe("");  });}); describe("cleanText", () => {  it("strips junk glyphs and collapses whitespace", () => {    expect(cleanText("Foo 🎬 Bar")).toBe("Foo Bar");    expect(cleanText("🎬🎬")).toBe("Untitled");  });}); describe("truncate", () => {  it("truncates with an ellipsis", () => {    expect(truncate("hello world", 5)).toBe("hell…");    expect(truncate("hi", 5)).toBe("hi");  });}); describe("stripControl", () => {  const ESC = String.fromCharCode(0x1b);  const BEL = String.fromCharCode(0x07);  const hash = "0123456789abcdef0123456789abcdef01234567";   it("removes an OSC-52 clipboard-write smuggled into a magnet", () => {    const magnet = `magnet:?xt=urn:btih:${hash}${ESC}]52;c;ZXZpbA==${BEL}`;    expect(stripControl(magnet)).toBe(`magnet:?xt=urn:btih:${hash}]52;c;ZXZpbA==`);  });   it("removes CSI colour/cursor escapes", () => {    expect(stripControl(`${ESC}[31mred${ESC}[0m`)).toBe("[31mred[0m");  });   it("removes DEL and C1 controls (8-bit CSI/OSC/ST forms)", () => {    const c1 = `x${String.fromCharCode(0x9b)}y${String.fromCharCode(0x9c)}z${String.fromCharCode(0x7f)}`;    expect(stripControl(c1)).toBe("xyz");  });   it("preserves ordinary characters exactly, without cleanText's folding", () => {    expect(stripControl(hash)).toBe(hash);    expect(stripControl("a  b")).toBe("a  b");    expect(stripControl("")).toBe("");  });});