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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.import { assertEquals } from "../assert/mod.ts";import * as posix from "./posix/mod.ts";import * as windows from "./windows/mod.ts";import { join } from "./join.ts";
const backslashRE = /\\/g;
const joinTests =  // arguments                     result  [    [[".", "x/b", "..", "/b/c.js"], "x/b/c.js"],    [[], "."],    [["/.", "x/b", "..", "/b/c.js"], "/x/b/c.js"],    [["/foo", "../../../bar"], "/bar"],    [["foo", "../../../bar"], "../../bar"],    [["foo/", "../../../bar"], "../../bar"],    [["foo/x", "../../../bar"], "../bar"],    [["foo/x", "./bar"], "foo/x/bar"],    [["foo/x/", "./bar"], "foo/x/bar"],    [["foo/x/", ".", "bar"], "foo/x/bar"],    [["./"], "./"],    [[".", "./"], "./"],    [[".", ".", "."], "."],    [[".", "./", "."], "."],    [[".", "/./", "."], "."],    [[".", "/////./", "."], "."],    [["."], "."],    [["", "."], "."],    [["", "foo"], "foo"],    [["foo", "/bar"], "foo/bar"],    [["", "/foo"], "/foo"],    [["", "", "/foo"], "/foo"],    [["", "", "foo"], "foo"],    [["foo", ""], "foo"],    [["foo/", ""], "foo/"],    [["foo", "", "/bar"], "foo/bar"],    [["./", "..", "/foo"], "../foo"],    [["./", "..", "..", "/foo"], "../../foo"],    [[".", "..", "..", "/foo"], "../../foo"],    [["", "..", "..", "/foo"], "../../foo"],    [["/"], "/"],    [["/", "."], "/"],    [["/", ".."], "/"],    [["/", "..", ".."], "/"],    [[""], "."],    [["", ""], "."],    [[" /foo"], " /foo"],    [[" ", "foo"], " /foo"],    [[" ", "."], " "],    [[" ", "/"], " /"],    [[" ", ""], " "],    [["/", "foo"], "/foo"],    [["/", "/foo"], "/foo"],    [["/", "//foo"], "/foo"],    [["/", "", "/foo"], "/foo"],    [["", "/", "foo"], "/foo"],    [["", "/", "/foo"], "/foo"],  ];
// Windows-specific join testsconst windowsJoinTests = [  // arguments                     result  // UNC path expected  [["//foo/bar"], "\\\\foo\\bar\\"],  [["\\/foo/bar"], "\\\\foo\\bar\\"],  [["\\\\foo/bar"], "\\\\foo\\bar\\"],  // UNC path expected - server and share separate  [["//foo", "bar"], "\\\\foo\\bar\\"],  [["//foo/", "bar"], "\\\\foo\\bar\\"],  [["//foo", "/bar"], "\\\\foo\\bar\\"],  // UNC path expected - questionable  [["//foo", "", "bar"], "\\\\foo\\bar\\"],  [["//foo/", "", "bar"], "\\\\foo\\bar\\"],  [["//foo/", "", "/bar"], "\\\\foo\\bar\\"],  // UNC path expected - even more questionable  [["", "//foo", "bar"], "\\\\foo\\bar\\"],  [["", "//foo/", "bar"], "\\\\foo\\bar\\"],  [["", "//foo/", "/bar"], "\\\\foo\\bar\\"],  // No UNC path expected (no double slash in first component)  [["\\", "foo/bar"], "\\foo\\bar"],  [["\\", "/foo/bar"], "\\foo\\bar"],  [["", "/", "/foo/bar"], "\\foo\\bar"],  // No UNC path expected (no non-slashes in first component -  // questionable)  [["//", "foo/bar"], "\\foo\\bar"],  [["//", "/foo/bar"], "\\foo\\bar"],  [["\\\\", "/", "/foo/bar"], "\\foo\\bar"],  [["//"], "\\"],  // No UNC path expected (share name missing - questionable).  [["//foo"], "\\foo"],  [["//foo/"], "\\foo\\"],  [["//foo", "/"], "\\foo\\"],  [["//foo", "", "/"], "\\foo\\"],  // No UNC path expected (too many leading slashes - questionable)  [["///foo/bar"], "\\foo\\bar"],  [["////foo", "bar"], "\\foo\\bar"],  [["\\\\\\/foo/bar"], "\\foo\\bar"],  // Drive-relative vs drive-absolute paths. This merely describes the  // status quo, rather than being obviously right  [["c:"], "c:."],  [["c:."], "c:."],  [["c:", ""], "c:."],  [["", "c:"], "c:."],  [["c:.", "/"], "c:.\\"],  [["c:.", "file"], "c:file"],  [["c:", "/"], "c:\\"],  [["c:", "file"], "c:\\file"],];
Deno.test("posix.join()", function () {  joinTests.forEach(function (p) {    const _p = p[0] as string[];    const actual = posix.join.apply(null, _p);    assertEquals(actual, p[1]);  });});
Deno.test("windows.join()", function () {  joinTests.forEach(function (p) {    const _p = p[0] as string[];    const actual = windows.join.apply(null, _p).replace(backslashRE, "/");    assertEquals(actual, p[1]);  });  windowsJoinTests.forEach(function (p) {    const _p = p[0] as string[];    const actual = windows.join.apply(null, _p);    assertEquals(actual, p[1]);  });});
Deno.test(`join() returns "." if input is empty`, function () {  assertEquals(join(""), ".");  assertEquals(join("", ""), ".");
  const pwd = Deno.cwd();  assertEquals(join(pwd), pwd);  assertEquals(join(pwd, ""), pwd);});