import { describe, it, expect } from "vite-plus/test"; import {  DISTRO_NAME_PATTERN,  extractDistroFromUncPath,  isValidDistroName,  parseWslDistroList,  resolveWslHomeUncPath,  resolveWslPickFolderDefaultPath,  wslUncPathToLinuxPath,} from "./wslPathParsing.ts"; function makeUtf16LeBuffer(text: string): Buffer {  return Buffer.from("" + text, "utf16le");} describe("parseWslDistroList", () => {  it("parses standard output with default distro marked", () => {    const output = makeUtf16LeBuffer(      [        "  NAME            STATE           VERSION",        "* Ubuntu           Running         2",        "  Debian           Stopped         2",        "  Ubuntu-22.04     Running         1",      ].join("\r\n"),    );    const distros = parseWslDistroList(output);    expect(distros).toEqual([      { name: "Ubuntu", isDefault: true, version: 2 },      { name: "Debian", isDefault: false, version: 2 },      { name: "Ubuntu-22.04", isDefault: false, version: 1 },    ]);  });   it("returns empty array for empty buffer", () => {    expect(parseWslDistroList(Buffer.alloc(0))).toEqual([]);  });   it("returns empty array for header-only output", () => {    const output = makeUtf16LeBuffer("  NAME            STATE           VERSION\r\n");    expect(parseWslDistroList(output)).toEqual([]);  });   it("skips malformed lines", () => {    const output = makeUtf16LeBuffer(      [        "  NAME            STATE           VERSION",        "* Ubuntu           Running         2",        "  bad line",        "",        "  Debian           Stopped         2",      ].join("\r\n"),    );    const distros = parseWslDistroList(output);    expect(distros).toEqual([      { name: "Ubuntu", isDefault: true, version: 2 },      { name: "Debian", isDefault: false, version: 2 },    ]);  });   it("handles output without BOM", () => {    const text = [      "  NAME            STATE           VERSION",      "* Ubuntu           Running         2",    ].join("\r\n");    const output = Buffer.from(text, "utf16le");    const distros = parseWslDistroList(output);    expect(distros).toEqual([{ name: "Ubuntu", isDefault: true, version: 2 }]);  });   it("handles UTF-8 output", () => {    const text = [      "  NAME            STATE           VERSION",      "* Debian           Running         2",    ].join("\r\n");    const distros = parseWslDistroList(Buffer.from(text, "utf8"));    expect(distros).toEqual([{ name: "Debian", isDefault: true, version: 2 }]);  });}); describe("extractDistroFromUncPath", () => {  it("extracts the distro from \\\\wsl.localhost UNC paths", () => {    expect(extractDistroFromUncPath("\\\\wsl.localhost\\Ubuntu-22.04\\home\\josh")).toBe(      "Ubuntu-22.04",    );  });   it("extracts the distro from the legacy \\\\wsl$ UNC paths", () => {    expect(extractDistroFromUncPath("\\\\wsl$\\Debian\\home\\josh")).toBe("Debian");  });   it("returns null for non-UNC Windows paths", () => {    expect(extractDistroFromUncPath("C:\\Users\\Josh\\project")).toBeNull();  });   it("returns null when the segment is not a valid distro name", () => {    expect(extractDistroFromUncPath("\\\\wsl.localhost\\bad name!\\home")).toBeNull();  });}); describe("wslUncPathToLinuxPath", () => {  it("maps WSL UNC paths back to Linux absolute paths", () => {    expect(wslUncPathToLinuxPath("\\\\wsl.localhost\\Ubuntu-22.04\\home\\josh\\repo")).toBe(      "/home/josh/repo",    );  });   it("maps a distro UNC root to Linux root", () => {    expect(wslUncPathToLinuxPath("\\\\wsl$\\Debian")).toBe("/");    expect(wslUncPathToLinuxPath("\\\\wsl.localhost\\Debian\\")).toBe("/");  });   it("rejects invalid distro names and non-WSL paths", () => {    expect(wslUncPathToLinuxPath("\\\\wsl.localhost\\bad!name\\home")).toBeNull();    expect(wslUncPathToLinuxPath("C:\\Users\\Josh\\repo")).toBeNull();  });}); describe("resolveWslHomeUncPath", () => {  const distros = [    { name: "Debian", isDefault: true, version: 2 as const },    { name: "Ubuntu", isDefault: false, version: 2 as const },  ];   it("uses the configured distro when one is selected", () => {    expect(resolveWslHomeUncPath({ distro: "Ubuntu" }, distros)).toBe(      "\\\\wsl.localhost\\Ubuntu\\home",    );  });   it("uses the actual default distro when config uses the WSL default", () => {    expect(resolveWslHomeUncPath({ distro: null }, distros)).toBe(      "\\\\wsl.localhost\\Debian\\home",    );  });   it("omits the default path when no default distro is known", () => {    expect(resolveWslHomeUncPath({ distro: null }, [])).toBeNull();  });}); describe("resolveWslPickFolderDefaultPath", () => {  const config = { distro: null };  const distros = [{ name: "Debian", isDefault: true, version: 2 as const }];   it("uses WSL home when no initial path is provided", () => {    expect(resolveWslPickFolderDefaultPath(undefined, config, distros)).toBe(      "\\\\wsl.localhost\\Debian\\home",    );  });   it("maps Linux initial paths to WSL UNC paths", () => {    expect(      resolveWslPickFolderDefaultPath({ initialPath: "/home/josh/project" }, config, distros),    ).toBe("\\\\wsl.localhost\\Debian\\home\\josh\\project");  });   it("expands ~/path against the user's home dir when known", () => {    expect(      resolveWslPickFolderDefaultPath({ initialPath: "~/project" }, config, distros, "/home/josh"),    ).toBe("\\\\wsl.localhost\\Debian\\home\\josh\\project");  });   it("resolves bare ~ to the user's home dir when known", () => {    expect(      resolveWslPickFolderDefaultPath({ initialPath: "~" }, config, distros, "/home/josh"),    ).toBe("\\\\wsl.localhost\\Debian\\home\\josh");  });   it("falls back to /home parent when the user's home dir isn't known", () => {    expect(resolveWslPickFolderDefaultPath({ initialPath: "~/project" }, config, distros)).toBe(      "\\\\wsl.localhost\\Debian\\home\\project",    );  });   it("preserves existing UNC initial paths", () => {    expect(      resolveWslPickFolderDefaultPath(        { initialPath: "\\\\wsl.localhost\\Ubuntu\\home\\josh" },        config,        distros,      ),    ).toBe("\\\\wsl.localhost\\Ubuntu\\home\\josh");  });}); describe("DISTRO_NAME_PATTERN / isValidDistroName", () => {  it("accepts common distro names", () => {    for (const name of ["Ubuntu", "Ubuntu-22.04", "kali-linux", "Debian", "Ubuntu 22.04"]) {      expect(DISTRO_NAME_PATTERN.test(name)).toBe(true);      expect(isValidDistroName(name)).toBe(true);    }  });   it("rejects names with trailing whitespace, hyphen, or dot", () => {    for (const name of ["Ubuntu ", "Ubuntu-", "Ubuntu."]) {      expect(DISTRO_NAME_PATTERN.test(name)).toBe(false);    }  });   it("rejects names containing control or shell-meta characters", () => {    for (const name of ["bad\nname", "bad\tname", "bad/name", "bad!name", "bad;name"]) {      expect(DISTRO_NAME_PATTERN.test(name)).toBe(false);    }  });});