mod testenv;

use std::fs;
use std::io::Write;
use std::path::Path;
use std::time::{Duration, SystemTime};
use test_case::test_case;

use normpath::PathExt;
use regex::escape;

use crate::testenv::TestEnv;

static DEFAULT_DIRS: &[&str] = &["one/two/three", "one/two/three/directory_foo"];

static DEFAULT_FILES: &[&str] = &[
    "a.foo",
    "one/b.foo",
    "one/two/c.foo",
    "one/two/C.Foo2",
    "one/two/three/d.foo",
    "fdignored.foo",
    "gitignored.foo",
    ".hidden.foo",
    "e1 e2",
];

#[allow(clippy::let_and_return)]
fn get_absolute_root_path(env: &TestEnv) -> String {
    let path = env
        .test_root()
        .normalize()
        .expect("absolute path")
        .as_path()
        .to_str()
        .expect("string")
        .to_string();

    #[cfg(windows)]
    let path = path.trim_start_matches(r"\\?\").to_string();

    path
}

#[cfg(test)]
fn get_test_env_with_abs_path(dirs: &[&'static str], files: &[&'static str]) -> (TestEnv, String) {
    let env = TestEnv::new(dirs, files);
    let root_path = get_absolute_root_path(&env);
    (env, root_path)
}

#[cfg(test)]
fn create_file_with_size<P: AsRef<Path>>(path: P, size_in_bytes: usize) {
    let content = "#".repeat(size_in_bytes);
    let mut f = fs::File::create::<P>(path).unwrap();
    f.write_all(content.as_bytes()).unwrap();
}

/// Simple test
#[test]
fn test_simple() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(&["a.foo"], "a.foo");
    te.assert_output(&["b.foo"], "one/b.foo");
    te.assert_output(&["d.foo"], "one/two/three/d.foo");

    te.assert_output(
        &["foo"],
        "a.foo
        one/b.foo
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/d.foo
        one/two/three/directory_foo/",
    );
}

static AND_EXTRA_FILES: &[&str] = &[
    "a.foo",
    "one/b.foo",
    "one/two/c.foo",
    "one/two/C.Foo2",
    "one/two/three/baz-quux",
    "one/two/three/Baz-Quux2",
    "one/two/three/d.foo",
    "fdignored.foo",
    "gitignored.foo",
    ".hidden.foo",
    "A-B.jpg",
    "A-C.png",
    "B-A.png",
    "B-C.png",
    "C-A.jpg",
    "C-B.png",
    "e1 e2",
];

/// AND test
#[test]
fn test_and_basic() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(
        &["foo", "--and", "c"],
        "one/two/C.Foo2
        one/two/c.foo
        one/two/three/directory_foo/",
    );

    te.assert_output(
        &["f", "--and", "[ad]", "--and", "[_]"],
        "one/two/three/directory_foo/",
    );

    te.assert_output(
        &["f", "--and", "[ad]", "--and", "[.]"],
        "a.foo
        one/two/three/d.foo",
    );

    te.assert_output(&["Foo", "--and", "C"], "one/two/C.Foo2");

    te.assert_output(&["foo", "--and", "asdasdasdsadasd"], "");
}

#[test]
fn test_and_empty_pattern() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);
    te.assert_output(&["Foo", "--and", "2", "--and", ""], "one/two/C.Foo2");
}

#[test]
fn test_and_bad_pattern() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_failure(&["Foo", "--and", "2", "--and", "[", "--and", "C"]);
    te.assert_failure(&["Foo", "--and", "[", "--and", "2", "--and", "C"]);
    te.assert_failure(&["Foo", "--and", "2", "--and", "C", "--and", "["]);
    te.assert_failure(&["[", "--and", "2", "--and", "C", "--and", "Foo"]);
}

#[test]
fn test_and_pattern_starts_with_dash() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(
        &["baz", "--and", "quux"],
        "one/two/three/Baz-Quux2
        one/two/three/baz-quux",
    );
    te.assert_output(
        &["baz", "--and", "-"],
        "one/two/three/Baz-Quux2
        one/two/three/baz-quux",
    );
    te.assert_output(
        &["Quu", "--and", "x", "--and", "-"],
        "one/two/three/Baz-Quux2",
    );
}

#[test]
fn test_and_plus_extension() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(
        &[
            "A",
            "--and",
            "B",
            "--extension",
            "jpg",
            "--extension",
            "png",
        ],
        "A-B.jpg
        B-A.png",
    );

    te.assert_output(
        &[
            "A",
            "--extension",
            "jpg",
            "--and",
            "B",
            "--extension",
            "png",
        ],
        "A-B.jpg
        B-A.png",
    );
}

#[test]
fn test_and_plus_type() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(
        &["c", "--type", "d", "--and", "foo"],
        "one/two/three/directory_foo/",
    );

    te.assert_output(
        &["c", "--type", "f", "--and", "foo"],
        "one/two/C.Foo2
        one/two/c.foo",
    );
}

#[test]
fn test_and_plus_glob() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(&["*foo", "--glob", "--and", "c*"], "one/two/c.foo");
}

#[test]
fn test_and_plus_fixed_strings() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(
        &["foo", "--fixed-strings", "--and", "c", "--and", "."],
        "one/two/c.foo
        one/two/C.Foo2",
    );

    te.assert_output(
        &["foo", "--fixed-strings", "--and", "[c]", "--and", "."],
        "",
    );

    te.assert_output(
        &["Foo", "--fixed-strings", "--and", "C", "--and", "."],
        "one/two/C.Foo2",
    );
}

#[test]
fn test_and_plus_ignore_case() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(
        &["Foo", "--ignore-case", "--and", "C", "--and", "[.]"],
        "one/two/C.Foo2
        one/two/c.foo",
    );
}

#[test]
fn test_and_plus_case_sensitive() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(
        &["foo", "--case-sensitive", "--and", "c", "--and", "[.]"],
        "one/two/c.foo",
    );
}

#[test]
fn test_and_plus_full_path() {
    let te = TestEnv::new(DEFAULT_DIRS, AND_EXTRA_FILES);

    te.assert_output(
        &[
            "three",
            "--full-path",
            "--and",
            "_foo",
            "--and",
            r"[/\\]dir",
        ],
        "one/two/three/directory_foo/",
    );

    te.assert_output(
        &[
            "three",
            "--full-path",
            "--and",
            r"[/\\]two",
            "--and",
            r"[/\\]dir",
        ],
        "one/two/three/directory_foo/",
    );
}

/// Test each pattern type with an empty pattern.
#[test]
fn test_empty_pattern() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);
    let expected = "a.foo
    e1 e2
    one/
    one/b.foo
    one/two/
    one/two/c.foo
    one/two/C.Foo2
    one/two/three/
    one/two/three/d.foo
    one/two/three/directory_foo/
    symlink";

    te.assert_output(&["--regex"], expected);
    te.assert_output(&["--fixed-strings"], expected);
    te.assert_output(&["--glob"], expected);
}

/// Test multiple directory searches
#[test]
fn test_multi_file() {
    let dirs = &["test1", "test2"];
    let files = &["test1/a.foo", "test1/b.foo", "test2/a.foo"];
    let te = TestEnv::new(dirs, files);
    te.assert_output(
        &["a.foo", "test1", "test2"],
        "test1/a.foo
        test2/a.foo",
    );

    te.assert_output(
        &["", "test1", "test2"],
        "test1/a.foo
        test2/a.foo
        test1/b.foo",
    );

    te.assert_output(&["a.foo", "test1"], "test1/a.foo");

    te.assert_output(&["b.foo", "test1", "test2"], "test1/b.foo");
}

/// Test search over multiple directory with missing
#[test]
fn test_multi_file_with_missing() {
    let dirs = &["real"];
    let files = &["real/a.foo", "real/b.foo"];
    let te = TestEnv::new(dirs, files);
    te.assert_output(&["a.foo", "real", "fake"], "real/a.foo");

    te.assert_error(
        &["a.foo", "real", "fake"],
        "[fd error]: Search path 'fake' is not a directory.",
    );

    te.assert_output(
        &["", "real", "fake"],
        "real/a.foo
        real/b.foo",
    );

    te.assert_output(
        &["", "real", "fake1", "fake2"],
        "real/a.foo
        real/b.foo",
    );

    te.assert_error(
        &["", "real", "fake1", "fake2"],
        "[fd error]: Search path 'fake1' is not a directory.
        [fd error]: Search path 'fake2' is not a directory.",
    );

    te.assert_failure_with_error(
        &["", "fake1", "fake2"],
        "[fd error]: Search path 'fake1' is not a directory.
        [fd error]: Search path 'fake2' is not a directory.
        [fd error]: No valid search paths given.",
    );
}

/// Explicit root path
#[test]
fn test_explicit_root_path() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["foo", "one"],
        "one/b.foo
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/d.foo
        one/two/three/directory_foo/",
    );

    te.assert_output(
        &["foo", "one/two/three"],
        "one/two/three/d.foo
        one/two/three/directory_foo/",
    );

    te.assert_output_subdirectory(
        "one/two/",
        &["foo", "../../"],
        "../../a.foo
        ../../one/b.foo
        ../../one/two/c.foo
        ../../one/two/C.Foo2
        ../../one/two/three/d.foo
        ../../one/two/three/directory_foo/",
    );

    te.assert_output_subdirectory(
        "one/two/three",
        &["", ".."],
        "../c.foo
        ../C.Foo2
        ../three/
        ../three/d.foo
        ../three/directory_foo/",
    );
}

/// Regex searches
#[test]
fn test_regex_searches() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["[a-c].foo"],
        "a.foo
        one/b.foo
        one/two/c.foo
        one/two/C.Foo2",
    );

    te.assert_output(
        &["--case-sensitive", "[a-c].foo"],
        "a.foo
        one/b.foo
        one/two/c.foo",
    );
}

/// Smart case
#[test]
fn test_smart_case() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["c.foo"],
        "one/two/c.foo
        one/two/C.Foo2",
    );

    te.assert_output(&["C.Foo"], "one/two/C.Foo2");

    te.assert_output(&["Foo"], "one/two/C.Foo2");

    // Only literal uppercase chars should trigger case sensitivity.
    te.assert_output(
        &["\\Ac"],
        "one/two/c.foo
        one/two/C.Foo2",
    );
    te.assert_output(&["\\AC"], "one/two/C.Foo2");
}

/// Case sensitivity (--case-sensitive)
#[test]
fn test_case_sensitive() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(&["--case-sensitive", "c.foo"], "one/two/c.foo");

    te.assert_output(&["--case-sensitive", "C.Foo"], "one/two/C.Foo2");

    te.assert_output(
        &["--ignore-case", "--case-sensitive", "C.Foo"],
        "one/two/C.Foo2",
    );
}

/// Case insensitivity (--ignore-case)
#[test]
fn test_case_insensitive() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--ignore-case", "C.Foo"],
        "one/two/c.foo
        one/two/C.Foo2",
    );

    te.assert_output(
        &["--case-sensitive", "--ignore-case", "C.Foo"],
        "one/two/c.foo
        one/two/C.Foo2",
    );
}

/// Glob-based searches (--glob)
#[test]
fn test_glob_searches() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--glob", "*.foo"],
        "a.foo
        one/b.foo
        one/two/c.foo
        one/two/three/d.foo",
    );

    te.assert_output(
        &["--glob", "[a-c].foo"],
        "a.foo
        one/b.foo
        one/two/c.foo",
    );

    te.assert_output(
        &["--glob", "[a-c].foo*"],
        "a.foo
        one/b.foo
        one/two/C.Foo2
        one/two/c.foo",
    );
}

/// Glob-based searches (--glob) in combination with full path searches (--full-path)
#[cfg(not(windows))] // TODO: make this work on Windows
#[test]
fn test_full_path_glob_searches() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--glob", "--full-path", "**/one/**/*.foo"],
        "one/b.foo
        one/two/c.foo
        one/two/three/d.foo",
    );

    te.assert_output(
        &["--glob", "--full-path", "**/one/*/*.foo"],
        " one/two/c.foo",
    );

    te.assert_output(
        &["--glob", "--full-path", "**/one/*/*/*.foo"],
        " one/two/three/d.foo",
    );
}

#[test]
fn test_smart_case_glob_searches() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--glob", "c.foo*"],
        "one/two/C.Foo2
        one/two/c.foo",
    );

    te.assert_output(&["--glob", "C.Foo*"], "one/two/C.Foo2");
}

/// Glob-based searches (--glob) in combination with --case-sensitive
#[test]
fn test_case_sensitive_glob_searches() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(&["--glob", "--case-sensitive", "c.foo*"], "one/two/c.foo");
}

/// Glob-based searches (--glob) in combination with --extension
#[test]
fn test_glob_searches_with_extension() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--glob", "--extension", "foo2", "[a-z].*"],
        "one/two/C.Foo2",
    );
}

/// Make sure that --regex overrides --glob
#[test]
fn test_regex_overrides_glob() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(&["--glob", "--regex", "Foo2$"], "one/two/C.Foo2");
}

/// Full path search (--full-path)
#[test]
fn test_full_path() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    let root = te.system_root();
    let prefix = escape(&root.to_string_lossy());

    te.assert_output(
        &[
            "--full-path",
            &format!("^{prefix}.*three.*foo$", prefix = prefix),
        ],
        "one/two/three/d.foo
        one/two/three/directory_foo/",
    );
}

/// Hidden files (--hidden)
#[test]
fn test_hidden() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--hidden", "foo"],
        ".hidden.foo
        a.foo
        one/b.foo
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/d.foo
        one/two/three/directory_foo/",
    );
}

/// Hidden file attribute on Windows
#[cfg(windows)]
#[test]
fn test_hidden_file_attribute() {
    use std::os::windows::fs::OpenOptionsExt;

    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    // https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-setfileattributesa
    const FILE_ATTRIBUTE_HIDDEN: u32 = 2;

    fs::OpenOptions::new()
        .create(true)
        .write(true)
        .attributes(FILE_ATTRIBUTE_HIDDEN)
        .open(te.test_root().join("hidden-file.txt"))
        .unwrap();

    te.assert_output(&["--hidden", "hidden-file.txt"], "hidden-file.txt");
    te.assert_output(&["hidden-file.txt"], "");
}

/// Ignored files (--no-ignore)
#[test]
fn test_no_ignore() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--no-ignore", "foo"],
        "a.foo
        fdignored.foo
        gitignored.foo
        one/b.foo
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/d.foo
        one/two/three/directory_foo/",
    );

    te.assert_output(
        &["--hidden", "--no-ignore", "foo"],
        ".hidden.foo
        a.foo
        fdignored.foo
        gitignored.foo
        one/b.foo
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/d.foo
        one/two/three/directory_foo/",
    );
}

/// .gitignore and .fdignore
#[test]
fn test_gitignore_and_fdignore() {
    let files = &[
        "ignored-by-nothing",
        "ignored-by-fdignore",
        "ignored-by-gitignore",
        "ignored-by-both",
    ];
    let te = TestEnv::new(&[], files);

    fs::File::create(te.test_root().join(".fdignore"))
        .unwrap()
        .write_all(b"ignored-by-fdignore\nignored-by-both")
        .unwrap();

    fs::File::create(te.test_root().join(".gitignore"))
        .unwrap()
        .write_all(b"ignored-by-gitignore\nignored-by-both")
        .unwrap();

    te.assert_output(&["ignored"], "ignored-by-nothing");

    te.assert_output(
        &["--no-ignore-vcs", "ignored"],
        "ignored-by-nothing
        ignored-by-gitignore",
    );

    te.assert_output(
        &["--no-ignore", "ignored"],
        "ignored-by-nothing
        ignored-by-fdignore
        ignored-by-gitignore
        ignored-by-both",
    );
}

/// Ignore parent ignore files (--no-ignore-parent)
#[test]
fn test_no_ignore_parent() {
    let dirs = &["inner"];
    let files = &[
        "inner/parent-ignored",
        "inner/child-ignored",
        "inner/not-ignored",
    ];
    let te = TestEnv::new(dirs, files);

    // Ignore 'parent-ignored' in root
    fs::File::create(te.test_root().join(".gitignore"))
        .unwrap()
        .write_all(b"parent-ignored")
        .unwrap();
    // Ignore 'child-ignored' in inner
    fs::File::create(te.test_root().join("inner/.gitignore"))
        .unwrap()
        .write_all(b"child-ignored")
        .unwrap();

    te.assert_output_subdirectory("inner", &[], "not-ignored");

    te.assert_output_subdirectory(
        "inner",
        &["--no-ignore-parent"],
        "parent-ignored
        not-ignored",
    );
}

/// Ignore parent ignore files (--no-ignore-parent) with an inner git repo
#[test]
fn test_no_ignore_parent_inner_git() {
    let dirs = &["inner"];
    let files = &[
        "inner/parent-ignored",
        "inner/child-ignored",
        "inner/not-ignored",
    ];
    let te = TestEnv::new(dirs, files);

    // Make the inner folder also appear as a git repo
    fs::create_dir_all(te.test_root().join("inner/.git")).unwrap();

    // Ignore 'parent-ignored' in root
    fs::File::create(te.test_root().join(".gitignore"))
        .unwrap()
        .write_all(b"parent-ignored")
        .unwrap();
    // Ignore 'child-ignored' in inner
    fs::File::create(te.test_root().join("inner/.gitignore"))
        .unwrap()
        .write_all(b"child-ignored")
        .unwrap();

    te.assert_output_subdirectory(
        "inner",
        &[],
        "not-ignored
        parent-ignored",
    );

    te.assert_output_subdirectory(
        "inner",
        &["--no-ignore-parent"],
        "not-ignored
        parent-ignored",
    );
}

/// Precedence of .fdignore files
#[test]
fn test_custom_ignore_precedence() {
    let dirs = &["inner"];
    let files = &["inner/foo"];
    let te = TestEnv::new(dirs, files);

    // Ignore 'foo' via .gitignore
    fs::File::create(te.test_root().join("inner/.gitignore"))
        .unwrap()
        .write_all(b"foo")
        .unwrap();

    // Whitelist 'foo' via .fdignore
    fs::File::create(te.test_root().join(".fdignore"))
        .unwrap()
        .write_all(b"!foo")
        .unwrap();

    te.assert_output(&["foo"], "inner/foo");

    te.assert_output(&["--no-ignore-vcs", "foo"], "inner/foo");

    te.assert_output(&["--no-ignore", "foo"], "inner/foo");
}

/// VCS ignored files (--no-ignore-vcs)
#[test]
fn test_no_ignore_vcs() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--no-ignore-vcs", "foo"],
        "a.foo
        gitignored.foo
        one/b.foo
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/d.foo
        one/two/three/directory_foo/",
    );
}

/// Test that --no-ignore-vcs still respects .fdignored in parent directory
#[test]
fn test_no_ignore_vcs_child_dir() {
    let te = TestEnv::new(
        &["inner"],
        &["inner/fdignored.foo", "inner/foo", "inner/gitignored.foo"],
    );

    te.assert_output_subdirectory(
        "inner",
        &["--no-ignore-vcs", "foo"],
        "foo
        gitignored.foo",
    );
}

/// Custom ignore files (--ignore-file)
#[test]
fn test_custom_ignore_files() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    // Ignore 'C.Foo2' and everything in 'three'.
    fs::File::create(te.test_root().join("custom.ignore"))
        .unwrap()
        .write_all(b"C.Foo2\nthree")
        .unwrap();

    te.assert_output(
        &["--ignore-file", "custom.ignore", "foo"],
        "a.foo
        one/b.foo
        one/two/c.foo",
    );
}

/// Ignored files with ripgrep aliases (-u / -uu)
#[test]
fn test_no_ignore_aliases() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["-u", "foo"],
        ".hidden.foo
        a.foo
        fdignored.foo
        gitignored.foo
        one/b.foo
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/d.foo
        one/two/three/directory_foo/",
    );
}

/// Symlinks (--follow)
#[test]
fn test_follow() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--follow", "c.foo"],
        "one/two/c.foo
        one/two/C.Foo2
        symlink/c.foo
        symlink/C.Foo2",
    );
}

// File system boundaries (--one-file-system)
// Limited to Unix because, to the best of my knowledge, there is no easy way to test a use case
// file systems mounted into the tree on Windows.
// Not limiting depth causes massive delay under Darwin, see BurntSushi/ripgrep#1429
#[test]
#[cfg(unix)]
fn test_file_system_boundaries() {
    // Helper function to get the device ID for a given path
    // Inspired by https://github.com/BurntSushi/ripgrep/blob/8892bf648cfec111e6e7ddd9f30e932b0371db68/ignore/src/walk.rs#L1693
    fn device_num(path: impl AsRef<Path>) -> u64 {
        use std::os::unix::fs::MetadataExt;

        path.as_ref().metadata().map(|md| md.dev()).unwrap()
    }

    // Can't simulate file system boundaries
    let te = TestEnv::new(&[], &[]);

    let dev_null = Path::new("/dev/null");

    // /dev/null should exist in all sane Unixes. Skip if it doesn't exist for some reason.
    // Also skip should it be on the same device as the root partition for some reason.
    if !dev_null.is_file() || device_num(dev_null) == device_num("/") {
        return;
    }

    te.assert_output(
        &["--full-path", "--max-depth", "2", "^/dev/null$", "/"],
        "/dev/null",
    );
    te.assert_output(
        &[
            "--one-file-system",
            "--full-path",
            "--max-depth",
            "2",
            "^/dev/null$",
            "/",
        ],
        "",
    );
}

#[test]
fn test_follow_broken_symlink() {
    let mut te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);
    te.create_broken_symlink("broken_symlink")
        .expect("Failed to create broken symlink.");

    te.assert_output(
        &["symlink"],
        "broken_symlink
        symlink",
    );
    te.assert_output(
        &["--type", "symlink", "symlink"],
        "broken_symlink
        symlink",
    );

    te.assert_output(&["--type", "file", "symlink"], "");

    te.assert_output(
        &["--follow", "--type", "symlink", "symlink"],
        "broken_symlink",
    );
    te.assert_output(&["--follow", "--type", "file", "symlink"], "");
}

/// Null separator (--print0)
#[test]
fn test_print0() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--print0", "foo"],
        "./a.fooNULL
        ./one/b.fooNULL
        ./one/two/C.Foo2NULL
        ./one/two/c.fooNULL
        ./one/two/three/d.fooNULL
        ./one/two/three/directory_foo/NULL",
    );
}

/// Maximum depth (--max-depth)
#[test]
fn test_max_depth() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--max-depth", "3"],
        "a.foo
        e1 e2
        one/
        one/b.foo
        one/two/
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/
        symlink",
    );

    te.assert_output(
        &["--max-depth", "2"],
        "a.foo
        e1 e2
        one/
        one/b.foo
        one/two/
        symlink",
    );

    te.assert_output(
        &["--max-depth", "1"],
        "a.foo
        e1 e2
        one/
        symlink",
    );
}

/// Minimum depth (--min-depth)
#[test]
fn test_min_depth() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--min-depth", "3"],
        "one/two/c.foo
        one/two/C.Foo2
        one/two/three/
        one/two/three/d.foo
        one/two/three/directory_foo/",
    );

    te.assert_output(
        &["--min-depth", "4"],
        "one/two/three/d.foo
        one/two/three/directory_foo/",
    );
}

/// Exact depth (--exact-depth)
#[test]
fn test_exact_depth() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--exact-depth", "3"],
        "one/two/c.foo
        one/two/C.Foo2
        one/two/three/",
    );
}

/// Pruning (--prune)
#[test]
fn test_prune() {
    let dirs = &["foo/bar", "bar/foo", "baz"];
    let files = &[
        "foo/foo.file",
        "foo/bar/foo.file",
        "bar/foo.file",
        "bar/foo/foo.file",
        "baz/foo.file",
    ];

    let te = TestEnv::new(dirs, files);

    te.assert_output(
        &["foo"],
        "foo/
        foo/foo.file
        foo/bar/foo.file
        bar/foo.file
        bar/foo/
        bar/foo/foo.file
        baz/foo.file",
    );

    te.assert_output(
        &["--prune", "foo"],
        "foo/
        bar/foo/
        bar/foo.file
        baz/foo.file",
    );
}

/// Absolute paths (--absolute-path)
#[test]
fn test_absolute_path() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--absolute-path"],
        &format!(
            "{abs_path}/a.foo
            {abs_path}/e1 e2
            {abs_path}/one/
            {abs_path}/one/b.foo
            {abs_path}/one/two/
            {abs_path}/one/two/c.foo
            {abs_path}/one/two/C.Foo2
            {abs_path}/one/two/three/
            {abs_path}/one/two/three/d.foo
            {abs_path}/one/two/three/directory_foo/
            {abs_path}/symlink",
            abs_path = &abs_path
        ),
    );

    te.assert_output(
        &["--absolute-path", "foo"],
        &format!(
            "{abs_path}/a.foo
            {abs_path}/one/b.foo
            {abs_path}/one/two/c.foo
            {abs_path}/one/two/C.Foo2
            {abs_path}/one/two/three/d.foo
            {abs_path}/one/two/three/directory_foo/",
            abs_path = &abs_path
        ),
    );
}

/// Show absolute paths if the path argument is absolute
#[test]
fn test_implicit_absolute_path() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["foo", &abs_path],
        &format!(
            "{abs_path}/a.foo
            {abs_path}/one/b.foo
            {abs_path}/one/two/c.foo
            {abs_path}/one/two/C.Foo2
            {abs_path}/one/two/three/d.foo
            {abs_path}/one/two/three/directory_foo/",
            abs_path = &abs_path
        ),
    );
}

/// Absolute paths should be normalized
#[test]
fn test_normalized_absolute_path() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output_subdirectory(
        "one",
        &["--absolute-path", "foo", ".."],
        &format!(
            "{abs_path}/a.foo
            {abs_path}/one/b.foo
            {abs_path}/one/two/c.foo
            {abs_path}/one/two/C.Foo2
            {abs_path}/one/two/three/d.foo
            {abs_path}/one/two/three/directory_foo/",
            abs_path = &abs_path
        ),
    );
}

/// File type filter (--type)
#[test]
fn test_type() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--type", "f"],
        "a.foo
        e1 e2
        one/b.foo
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/d.foo",
    );

    te.assert_output(&["--type", "f", "e1"], "e1 e2");

    te.assert_output(
        &["--type", "d"],
        "one/
        one/two/
        one/two/three/
        one/two/three/directory_foo/",
    );

    te.assert_output(
        &["--type", "d", "--type", "l"],
        "one/
        one/two/
        one/two/three/
        one/two/three/directory_foo/
        symlink",
    );

    te.assert_output(&["--type", "l"], "symlink");
}

/// Test `--type executable`
#[cfg(unix)]
#[test]
fn test_type_executable() {
    use std::os::unix::fs::OpenOptionsExt;

    // This test assumes the current user isn't root
    // (otherwise if the executable bit is set for any level, it is executable for the current
    // user)
    if users::get_current_uid() == 0 {
        return;
    }

    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    fs::OpenOptions::new()
        .create(true)
        .write(true)
        .mode(0o777)
        .open(te.test_root().join("executable-file.sh"))
        .unwrap();

    fs::OpenOptions::new()
        .create(true)
        .write(true)
        .mode(0o645)
        .open(te.test_root().join("not-user-executable-file.sh"))
        .unwrap();

    te.assert_output(&["--type", "executable"], "executable-file.sh");

    te.assert_output(
        &["--type", "executable", "--type", "directory"],
        "executable-file.sh
        one/
        one/two/
        one/two/three/
        one/two/three/directory_foo/",
    );
}

/// Test `--type empty`
#[test]
fn test_type_empty() {
    let te = TestEnv::new(&["dir_empty", "dir_nonempty"], &[]);

    create_file_with_size(te.test_root().join("0_bytes.foo"), 0);
    create_file_with_size(te.test_root().join("5_bytes.foo"), 5);

    create_file_with_size(te.test_root().join("dir_nonempty").join("2_bytes.foo"), 2);

    te.assert_output(
        &["--type", "empty"],
        "0_bytes.foo
        dir_empty/",
    );

    te.assert_output(
        &["--type", "empty", "--type", "file", "--type", "directory"],
        "0_bytes.foo
        dir_empty/",
    );

    te.assert_output(&["--type", "empty", "--type", "file"], "0_bytes.foo");

    te.assert_output(&["--type", "empty", "--type", "directory"], "dir_empty/");
}

/// File extension (--extension)
#[test]
fn test_extension() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--extension", "foo"],
        "a.foo
        one/b.foo
        one/two/c.foo
        one/two/three/d.foo",
    );

    te.assert_output(
        &["--extension", ".foo"],
        "a.foo
        one/b.foo
        one/two/c.foo
        one/two/three/d.foo",
    );

    te.assert_output(
        &["--extension", ".foo", "--extension", "foo2"],
        "a.foo
        one/b.foo
        one/two/c.foo
        one/two/three/d.foo
        one/two/C.Foo2",
    );

    te.assert_output(&["--extension", ".foo", "a"], "a.foo");

    te.assert_output(&["--extension", "foo2"], "one/two/C.Foo2");

    let te2 = TestEnv::new(&[], &["spam.bar.baz", "egg.bar.baz", "yolk.bar.baz.sig"]);

    te2.assert_output(
        &["--extension", ".bar.baz"],
        "spam.bar.baz
        egg.bar.baz",
    );

    te2.assert_output(&["--extension", "sig"], "yolk.bar.baz.sig");

    te2.assert_output(&["--extension", "bar.baz.sig"], "yolk.bar.baz.sig");

    let te3 = TestEnv::new(&[], &["latin1.e\u{301}xt", "smiley.☻"]);

    te3.assert_output(&["--extension", "☻"], "smiley.☻");

    te3.assert_output(&["--extension", ".e\u{301}xt"], "latin1.e\u{301}xt");

    let te4 = TestEnv::new(&[], &[".hidden", "test.hidden"]);

    te4.assert_output(&["--hidden", "--extension", ".hidden"], "test.hidden");
}

/// No file extension (test for the pattern provided in the --help text)
#[test]
fn test_no_extension() {
    let te = TestEnv::new(
        DEFAULT_DIRS,
        &["a.foo", "aa", "one/b.foo", "one/bb", "one/two/three/d"],
    );

    te.assert_output(
        &["^[^.]+$"],
        "aa
        one/
        one/bb
        one/two/
        one/two/three/
        one/two/three/d
        one/two/three/directory_foo/
        symlink",
    );

    te.assert_output(
        &["^[^.]+$", "--type", "file"],
        "aa
        one/bb
        one/two/three/d",
    );
}

/// Symlink as search directory
#[test]
fn test_symlink_as_root() {
    let mut te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);
    te.create_broken_symlink("broken_symlink")
        .expect("Failed to create broken symlink.");

    // From: http://pubs.opengroup.org/onlinepubs/9699919799/functions/getcwd.html
    // The getcwd() function shall place an absolute pathname of the current working directory in
    // the array pointed to by buf, and return buf. The pathname shall contain no components that
    // are dot or dot-dot, or are symbolic links.
    //
    // Key points:
    // 1. The path of the current working directory of a Unix process cannot contain symlinks.
    // 2. The path of the current working directory of a Windows process can contain symlinks.
    //
    // More:
    // 1. On Windows, symlinks are resolved after the ".." component.
    // 2. On Unix, symlinks are resolved immediately as encountered.

    let parent_parent = if cfg!(windows) { ".." } else { "../.." };
    te.assert_output_subdirectory(
        "symlink",
        &["", parent_parent],
        &format!(
            "{dir}/a.foo
            {dir}/broken_symlink
            {dir}/e1 e2
            {dir}/one/
            {dir}/one/b.foo
            {dir}/one/two/
            {dir}/one/two/c.foo
            {dir}/one/two/C.Foo2
            {dir}/one/two/three/
            {dir}/one/two/three/d.foo
            {dir}/one/two/three/directory_foo/
            {dir}/symlink",
            dir = &parent_parent
        ),
    );
}

#[test]
fn test_symlink_and_absolute_path() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);

    let expected_path = if cfg!(windows) { "symlink" } else { "one/two" };

    te.assert_output_subdirectory(
        "symlink",
        &["--absolute-path"],
        &format!(
            "{abs_path}/{expected_path}/c.foo
            {abs_path}/{expected_path}/C.Foo2
            {abs_path}/{expected_path}/three/
            {abs_path}/{expected_path}/three/d.foo
            {abs_path}/{expected_path}/three/directory_foo/",
            abs_path = &abs_path,
            expected_path = expected_path
        ),
    );
}

#[test]
fn test_symlink_as_absolute_root() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["", &format!("{abs_path}/symlink", abs_path = abs_path)],
        &format!(
            "{abs_path}/symlink/c.foo
            {abs_path}/symlink/C.Foo2
            {abs_path}/symlink/three/
            {abs_path}/symlink/three/d.foo
            {abs_path}/symlink/three/directory_foo/",
            abs_path = &abs_path
        ),
    );
}

#[test]
fn test_symlink_and_full_path() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);
    let root = te.system_root();
    let prefix = escape(&root.to_string_lossy());

    let expected_path = if cfg!(windows) { "symlink" } else { "one/two" };

    te.assert_output_subdirectory(
        "symlink",
        &[
            "--absolute-path",
            "--full-path",
            &format!("^{prefix}.*three", prefix = prefix),
        ],
        &format!(
            "{abs_path}/{expected_path}/three/
            {abs_path}/{expected_path}/three/d.foo
            {abs_path}/{expected_path}/three/directory_foo/",
            abs_path = &abs_path,
            expected_path = expected_path
        ),
    );
}

#[test]
fn test_symlink_and_full_path_abs_path() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);
    let root = te.system_root();
    let prefix = escape(&root.to_string_lossy());
    te.assert_output(
        &[
            "--full-path",
            &format!("^{prefix}.*symlink.*three", prefix = prefix),
            &format!("{abs_path}/symlink", abs_path = abs_path),
        ],
        &format!(
            "{abs_path}/symlink/three/
            {abs_path}/symlink/three/d.foo
            {abs_path}/symlink/three/directory_foo/",
            abs_path = &abs_path
        ),
    );
}
/// Exclude patterns (--exclude)
#[test]
fn test_excludes() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--exclude", "*.foo"],
        "one/
        one/two/
        one/two/C.Foo2
        one/two/three/
        one/two/three/directory_foo/
        e1 e2
        symlink",
    );

    te.assert_output(
        &["--exclude", "*.foo", "--exclude", "*.Foo2"],
        "one/
        one/two/
        one/two/three/
        one/two/three/directory_foo/
        e1 e2
        symlink",
    );

    te.assert_output(
        &["--exclude", "*.foo", "--exclude", "*.Foo2", "foo"],
        "one/two/three/directory_foo/",
    );

    te.assert_output(
        &["--exclude", "one/two/", "foo"],
        "a.foo
        one/b.foo",
    );

    te.assert_output(
        &["--exclude", "one/**/*.foo"],
        "a.foo
        e1 e2
        one/
        one/two/
        one/two/C.Foo2
        one/two/three/
        one/two/three/directory_foo/
        symlink",
    );
}

/// Shell script execution (--exec)
#[test]
fn test_exec() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);
    // TODO Windows tests: D:file.txt \file.txt \\server\share\file.txt ...
    if !cfg!(windows) {
        te.assert_output(
            &["--absolute-path", "foo", "--exec", "echo"],
            &format!(
                "{abs_path}/a.foo
                {abs_path}/one/b.foo
                {abs_path}/one/two/C.Foo2
                {abs_path}/one/two/c.foo
                {abs_path}/one/two/three/d.foo
                {abs_path}/one/two/three/directory_foo",
                abs_path = &abs_path
            ),
        );

        te.assert_output(
            &["foo", "--exec", "echo", "{}"],
            "./a.foo
            ./one/b.foo
            ./one/two/C.Foo2
            ./one/two/c.foo
            ./one/two/three/d.foo
            ./one/two/three/directory_foo",
        );

        te.assert_output(
            &["foo", "--strip-cwd-prefix", "--exec", "echo", "{}"],
            "a.foo
            one/b.foo
            one/two/C.Foo2
            one/two/c.foo
            one/two/three/d.foo
            one/two/three/directory_foo",
        );

        te.assert_output(
            &["foo", "--exec", "echo", "{.}"],
            "a
            one/b
            one/two/C
            one/two/c
            one/two/three/d
            one/two/three/directory_foo",
        );

        te.assert_output(
            &["foo", "--exec", "echo", "{/}"],
            "a.foo
            b.foo
            C.Foo2
            c.foo
            d.foo
            directory_foo",
        );

        te.assert_output(
            &["foo", "--exec", "echo", "{/.}"],
            "a
            b
            C
            c
            d
            directory_foo",
        );

        te.assert_output(
            &["foo", "--exec", "echo", "{//}"],
            ".
            ./one
            ./one/two
            ./one/two
            ./one/two/three
            ./one/two/three",
        );

        te.assert_output(&["e1", "--exec", "printf", "%s.%s\n"], "./e1 e2.");
    }
}

#[test]
fn test_exec_multi() {
    // TODO test for windows
    if cfg!(windows) {
        return;
    }
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &[
            "--absolute-path",
            "foo",
            "--exec",
            "echo",
            ";",
            "--exec",
            "echo",
            "test",
            "{/}",
        ],
        &format!(
            "{abs_path}/a.foo
                {abs_path}/one/b.foo
                {abs_path}/one/two/C.Foo2
                {abs_path}/one/two/c.foo
                {abs_path}/one/two/three/d.foo
                {abs_path}/one/two/three/directory_foo
                test a.foo
                test b.foo
                test C.Foo2
                test c.foo
                test d.foo
                test directory_foo",
            abs_path = &abs_path
        ),
    );

    te.assert_output(
        &[
            "e1", "--exec", "echo", "{.}", ";", "--exec", "echo", "{/}", ";", "--exec", "echo",
            "{//}", ";", "--exec", "echo", "{/.}",
        ],
        "e1 e2
        e1 e2
        .
        e1 e2",
    );

    te.assert_output(
        &[
            "foo", "--exec", "echo", "-n", "{/}: ", ";", "--exec", "echo", "{//}",
        ],
        "a.foo: .
        b.foo: ./one
        C.Foo2: ./one/two
        c.foo: ./one/two
        d.foo: ./one/two/three
        directory_foo: ./one/two/three",
    );
}

#[test]
fn test_exec_batch() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);
    let te = te.normalize_line(true);

    // TODO Test for windows
    if !cfg!(windows) {
        te.assert_output(
            &["--absolute-path", "foo", "--exec-batch", "echo"],
            &format!(
                "{abs_path}/a.foo {abs_path}/one/b.foo {abs_path}/one/two/C.Foo2 {abs_path}/one/two/c.foo {abs_path}/one/two/three/d.foo {abs_path}/one/two/three/directory_foo",
                abs_path = &abs_path
            ),
        );

        te.assert_output(
            &["foo", "--exec-batch", "echo", "{}"],
            "./a.foo ./one/b.foo ./one/two/C.Foo2 ./one/two/c.foo ./one/two/three/d.foo ./one/two/three/directory_foo",
        );

        te.assert_output(
            &["foo", "--strip-cwd-prefix", "--exec-batch", "echo", "{}"],
            "a.foo one/b.foo one/two/C.Foo2 one/two/c.foo one/two/three/d.foo one/two/three/directory_foo",
        );

        te.assert_output(
            &["foo", "--exec-batch", "echo", "{/}"],
            "a.foo b.foo C.Foo2 c.foo d.foo directory_foo",
        );

        te.assert_output(
            &["no_match", "--exec-batch", "echo", "Matched: ", "{/}"],
            "",
        );

        te.assert_failure_with_error(
            &["foo", "--exec-batch", "echo", "{}", "{}"],
            "error: Only one placeholder allowed for batch commands\n\
            \n\
            Usage: fd [OPTIONS] [pattern] [path]...\n\
            \n\
            For more information try '--help'\n\
            ",
        );

        te.assert_failure_with_error(
            &["foo", "--exec-batch", "echo", "{/}", ";", "-x", "echo"],
            "error: The argument '--exec-batch <cmd>...' cannot be used with '--exec <cmd>...'",
        );

        te.assert_failure_with_error(
            &["foo", "--exec-batch"],
            "error: The argument '--exec-batch <cmd>...' requires a value but none was supplied",
        );

        te.assert_failure_with_error(
            &["foo", "--exec-batch", "echo {}"],
            "error: First argument of exec-batch is expected to be a fixed executable\n\
            \n\
            Usage: fd [OPTIONS] [pattern] [path]...\n\
            \n\
            For more information try '--help'\n\
            ",
        );

        te.assert_failure_with_error(&["a.foo", "--exec-batch", "bash", "-c", "exit 1"], "");
    }
}

#[test]
fn test_exec_batch_multi() {
    // TODO test for windows
    if cfg!(windows) {
        return;
    }
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    let output = te.assert_success_and_get_output(
        ".",
        &[
            "foo",
            "--exec-batch",
            "echo",
            "{}",
            ";",
            "--exec-batch",
            "echo",
            "{/}",
        ],
    );
    let stdout = std::str::from_utf8(&output.stdout).unwrap();
    let lines: Vec<_> = stdout
        .lines()
        .map(|l| {
            let mut words: Vec<_> = l.split_whitespace().collect();
            words.sort_unstable();
            words
        })
        .collect();

    assert_eq!(
        lines,
        &[
            [
                "./a.foo",
                "./one/b.foo",
                "./one/two/C.Foo2",
                "./one/two/c.foo",
                "./one/two/three/d.foo",
                "./one/two/three/directory_foo"
            ],
            [
                "C.Foo2",
                "a.foo",
                "b.foo",
                "c.foo",
                "d.foo",
                "directory_foo"
            ],
        ]
    );

    te.assert_failure_with_error(
        &[
            "a.foo",
            "--exec-batch",
            "echo",
            ";",
            "--exec-batch",
            "bash",
            "-c",
            "exit 1",
        ],
        "",
    );
}

#[test]
fn test_exec_batch_with_limit() {
    // TODO Test for windows
    if cfg!(windows) {
        return;
    }

    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    let output = te.assert_success_and_get_output(
        ".",
        &["foo", "--batch-size=2", "--exec-batch", "echo", "{}"],
    );
    let stdout = String::from_utf8_lossy(&output.stdout);

    for line in stdout.lines() {
        assert_eq!(2, line.split_whitespace().count());
    }

    let mut paths: Vec<_> = stdout
        .lines()
        .flat_map(|line| line.split_whitespace())
        .collect();
    paths.sort_unstable();
    assert_eq!(
        &paths,
        &[
            "./a.foo",
            "./one/b.foo",
            "./one/two/C.Foo2",
            "./one/two/c.foo",
            "./one/two/three/d.foo",
            "./one/two/three/directory_foo"
        ],
    );
}

/// Shell script execution (--exec) with a custom --path-separator
#[test]
fn test_exec_with_separator() {
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);
    te.assert_output(
        &[
            "--path-separator=#",
            "--absolute-path",
            "foo",
            "--exec",
            "echo",
        ],
        &format!(
            "{abs_path}#a.foo
                {abs_path}#one#b.foo
                {abs_path}#one#two#C.Foo2
                {abs_path}#one#two#c.foo
                {abs_path}#one#two#three#d.foo
                {abs_path}#one#two#three#directory_foo",
            abs_path = abs_path.replace(std::path::MAIN_SEPARATOR, "#"),
        ),
    );

    te.assert_output(
        &["--path-separator=#", "foo", "--exec", "echo", "{}"],
        ".#a.foo
            .#one#b.foo
            .#one#two#C.Foo2
            .#one#two#c.foo
            .#one#two#three#d.foo
            .#one#two#three#directory_foo",
    );

    te.assert_output(
        &["--path-separator=#", "foo", "--exec", "echo", "{.}"],
        "a
            one#b
            one#two#C
            one#two#c
            one#two#three#d
            one#two#three#directory_foo",
    );

    te.assert_output(
        &["--path-separator=#", "foo", "--exec", "echo", "{/}"],
        "a.foo
            b.foo
            C.Foo2
            c.foo
            d.foo
            directory_foo",
    );

    te.assert_output(
        &["--path-separator=#", "foo", "--exec", "echo", "{/.}"],
        "a
            b
            C
            c
            d
            directory_foo",
    );

    te.assert_output(
        &["--path-separator=#", "foo", "--exec", "echo", "{//}"],
        ".
            .#one
            .#one#two
            .#one#two
            .#one#two#three
            .#one#two#three",
    );

    te.assert_output(
        &["--path-separator=#", "e1", "--exec", "printf", "%s.%s\n"],
        ".#e1 e2.",
    );
}

/// Non-zero exit code (--quiet)
#[test]
fn test_quiet() {
    let dirs = &[];
    let files = &["a.foo", "b.foo"];
    let te = TestEnv::new(dirs, files);

    te.assert_output(&["-q"], "");
    te.assert_output(&["--quiet"], "");
    te.assert_output(&["--has-results"], "");
    te.assert_failure_with_error(&["--quiet", "c.foo"], "")
}

/// Literal search (--fixed-strings)
#[test]
fn test_fixed_strings() {
    let dirs = &["test1", "test2"];
    let files = &["test1/a.foo", "test1/a_foo", "test2/Download (1).tar.gz"];
    let te = TestEnv::new(dirs, files);

    // Regex search, dot is treated as "any character"
    te.assert_output(
        &["a.foo"],
        "test1/a.foo
         test1/a_foo",
    );

    // Literal search, dot is treated as character
    te.assert_output(&["--fixed-strings", "a.foo"], "test1/a.foo");

    // Regex search, parens are treated as group
    te.assert_output(&["download (1)"], "");

    // Literal search, parens are treated as characters
    te.assert_output(
        &["--fixed-strings", "download (1)"],
        "test2/Download (1).tar.gz",
    );

    // Combine with --case-sensitive
    te.assert_output(&["--fixed-strings", "--case-sensitive", "download (1)"], "");
}

/// Filenames with invalid UTF-8 sequences
#[cfg(target_os = "linux")]
#[test]
fn test_invalid_utf8() {
    use std::ffi::OsStr;
    use std::os::unix::ffi::OsStrExt;

    let dirs = &["test1"];
    let files = &[];
    let te = TestEnv::new(dirs, files);

    fs::File::create(
        te.test_root()
            .join(OsStr::from_bytes(b"test1/test_\xFEinvalid.txt")),
    )
    .unwrap();

    te.assert_output(&["", "test1/"], "test1/test_�invalid.txt");

    te.assert_output(&["invalid", "test1/"], "test1/test_�invalid.txt");

    // Should not be found under a different extension
    te.assert_output(&["-e", "zip", "", "test1/"], "");
}

/// Filtering for file size (--size)
#[test]
fn test_size() {
    let te = TestEnv::new(&[], &[]);

    create_file_with_size(te.test_root().join("0_bytes.foo"), 0);
    create_file_with_size(te.test_root().join("11_bytes.foo"), 11);
    create_file_with_size(te.test_root().join("30_bytes.foo"), 30);
    create_file_with_size(te.test_root().join("3_kilobytes.foo"), 3 * 1000);
    create_file_with_size(te.test_root().join("4_kibibytes.foo"), 4 * 1024);

    // Zero and non-zero sized files.
    te.assert_output(
        &["", "--size", "+0B"],
        "0_bytes.foo
        11_bytes.foo
        30_bytes.foo
        3_kilobytes.foo
        4_kibibytes.foo",
    );

    // Zero sized files.
    te.assert_output(&["", "--size", "-0B"], "0_bytes.foo");
    te.assert_output(&["", "--size", "0B"], "0_bytes.foo");
    te.assert_output(&["", "--size=0B"], "0_bytes.foo");
    te.assert_output(&["", "-S", "0B"], "0_bytes.foo");

    // Files with 2 bytes or more.
    te.assert_output(
        &["", "--size", "+2B"],
        "11_bytes.foo
        30_bytes.foo
        3_kilobytes.foo
        4_kibibytes.foo",
    );

    // Files with 2 bytes or less.
    te.assert_output(&["", "--size", "-2B"], "0_bytes.foo");

    // Files with size between 1 byte and 11 bytes.
    te.assert_output(&["", "--size", "+1B", "--size", "-11B"], "11_bytes.foo");

    // Files with size equal 11 bytes.
    te.assert_output(&["", "--size", "11B"], "11_bytes.foo");

    // Files with size between 1 byte and 30 bytes.
    te.assert_output(
        &["", "--size", "+1B", "--size", "-30B"],
        "11_bytes.foo
        30_bytes.foo",
    );

    // Combine with a search pattern
    te.assert_output(&["^11_", "--size", "+1B", "--size", "-30B"], "11_bytes.foo");

    // Files with size between 12 and 30 bytes.
    te.assert_output(&["", "--size", "+12B", "--size", "-30B"], "30_bytes.foo");

    // Files with size between 31 and 100 bytes.
    te.assert_output(&["", "--size", "+31B", "--size", "-100B"], "");

    // Files with size between 3 kibibytes and 5 kibibytes.
    te.assert_output(&["", "--size", "+3ki", "--size", "-5ki"], "4_kibibytes.foo");

    // Files with size between 3 kilobytes and 5 kilobytes.
    te.assert_output(
        &["", "--size", "+3k", "--size", "-5k"],
        "3_kilobytes.foo
        4_kibibytes.foo",
    );

    // Files with size greater than 3 kilobytes and less than 3 kibibytes.
    te.assert_output(&["", "--size", "+3k", "--size", "-3ki"], "3_kilobytes.foo");

    // Files with size equal 4 kibibytes.
    te.assert_output(&["", "--size", "+4ki", "--size", "-4ki"], "4_kibibytes.foo");
    te.assert_output(&["", "--size", "4ki"], "4_kibibytes.foo");
}

#[cfg(test)]
fn create_file_with_modified<P: AsRef<Path>>(path: P, duration_in_secs: u64) {
    let st = SystemTime::now() - Duration::from_secs(duration_in_secs);
    let ft = filetime::FileTime::from_system_time(st);
    fs::File::create(&path).expect("creation failed");
    filetime::set_file_times(&path, ft, ft).expect("time modification failed");
}

#[cfg(test)]
fn remove_symlink<P: AsRef<Path>>(path: P) {
    #[cfg(unix)]
    fs::remove_file(path).expect("remove symlink");

    // On Windows, symlinks remember whether they point to files or directories, so try both
    #[cfg(windows)]
    fs::remove_file(path.as_ref())
        .or_else(|_| fs::remove_dir(path.as_ref()))
        .expect("remove symlink");
}

#[test]
fn test_modified_relative() {
    let te = TestEnv::new(&[], &[]);
    remove_symlink(te.test_root().join("symlink"));
    create_file_with_modified(te.test_root().join("foo_0_now"), 0);
    create_file_with_modified(te.test_root().join("bar_1_min"), 60);
    create_file_with_modified(te.test_root().join("foo_10_min"), 600);
    create_file_with_modified(te.test_root().join("bar_1_h"), 60 * 60);
    create_file_with_modified(te.test_root().join("foo_2_h"), 2 * 60 * 60);
    create_file_with_modified(te.test_root().join("bar_1_day"), 24 * 60 * 60);

    te.assert_output(
        &["", "--changed-within", "15min"],
        "foo_0_now
        bar_1_min
        foo_10_min",
    );

    te.assert_output(
        &["", "--change-older-than", "15min"],
        "bar_1_h
        foo_2_h
        bar_1_day",
    );

    te.assert_output(
        &["foo", "--changed-within", "12h"],
        "foo_0_now
        foo_10_min
        foo_2_h",
    );
}

#[cfg(test)]
fn change_file_modified<P: AsRef<Path>>(path: P, iso_date: &str) {
    let st = humantime::parse_rfc3339(iso_date).expect("invalid date");
    let ft = filetime::FileTime::from_system_time(st);
    filetime::set_file_times(path, ft, ft).expect("time modification failde");
}

#[test]
fn test_modified_absolute() {
    let te = TestEnv::new(&[], &["15mar2018", "30dec2017"]);
    remove_symlink(te.test_root().join("symlink"));
    change_file_modified(te.test_root().join("15mar2018"), "2018-03-15T12:00:00Z");
    change_file_modified(te.test_root().join("30dec2017"), "2017-12-30T23:59:00Z");

    te.assert_output(
        &["", "--change-newer-than", "2018-01-01 00:00:00"],
        "15mar2018",
    );
    te.assert_output(
        &["", "--changed-before", "2018-01-01 00:00:00"],
        "30dec2017",
    );
}

#[cfg(unix)]
#[test]
fn test_owner_ignore_all() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);
    te.assert_output(&["--owner", ":", "a.foo"], "a.foo");
    te.assert_output(&["--owner", "", "a.foo"], "a.foo");
}

#[cfg(unix)]
#[test]
fn test_owner_current_user() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);
    let uid = users::get_current_uid();
    te.assert_output(&["--owner", &uid.to_string(), "a.foo"], "a.foo");
    if let Some(username) = users::get_current_username().map(|u| u.into_string().unwrap()) {
        te.assert_output(&["--owner", &username, "a.foo"], "a.foo");
    }
}

#[cfg(unix)]
#[test]
fn test_owner_current_group() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);
    let gid = users::get_current_gid();
    te.assert_output(&["--owner", &format!(":{}", gid), "a.foo"], "a.foo");
    if let Some(groupname) = users::get_current_groupname().map(|u| u.into_string().unwrap()) {
        te.assert_output(&["--owner", &format!(":{}", groupname), "a.foo"], "a.foo");
    }
}

#[cfg(target_os = "linux")]
#[test]
fn test_owner_root() {
    // This test assumes the current user isn't root
    if users::get_current_uid() == 0 || users::get_current_gid() == 0 {
        return;
    }
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);
    te.assert_output(&["--owner", "root", "a.foo"], "");
    te.assert_output(&["--owner", "0", "a.foo"], "");
    te.assert_output(&["--owner", ":root", "a.foo"], "");
    te.assert_output(&["--owner", ":0", "a.foo"], "");
}

#[test]
fn test_custom_path_separator() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["foo", "one", "--path-separator", "="],
        "one=b.foo
        one=two=c.foo
        one=two=C.Foo2
        one=two=three=d.foo
        one=two=three=directory_foo=",
    );
}

#[test]
fn test_base_directory() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--base-directory", "one"],
        "b.foo
        two/
        two/c.foo
        two/C.Foo2
        two/three/
        two/three/d.foo
        two/three/directory_foo/",
    );

    te.assert_output(
        &["--base-directory", "one/two/", "foo"],
        "c.foo
        C.Foo2
        three/d.foo
        three/directory_foo/",
    );

    // Explicit root path
    te.assert_output(
        &["--base-directory", "one", "foo", "two"],
        "two/c.foo
        two/C.Foo2
        two/three/d.foo
        two/three/directory_foo/",
    );

    // Ignore base directory when absolute path is used
    let (te, abs_path) = get_test_env_with_abs_path(DEFAULT_DIRS, DEFAULT_FILES);
    let abs_base_dir = &format!("{abs_path}/one/two/", abs_path = &abs_path);
    te.assert_output(
        &["--base-directory", abs_base_dir, "foo", &abs_path],
        &format!(
            "{abs_path}/a.foo
            {abs_path}/one/b.foo
            {abs_path}/one/two/c.foo
            {abs_path}/one/two/C.Foo2
            {abs_path}/one/two/three/d.foo
            {abs_path}/one/two/three/directory_foo/",
            abs_path = &abs_path
        ),
    );
}

#[test]
fn test_max_results() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    // Unrestricted
    te.assert_output(
        &["--max-results=0", "c.foo"],
        "one/two/C.Foo2
         one/two/c.foo",
    );

    // Limited to two results
    te.assert_output(
        &["--max-results=2", "c.foo"],
        "one/two/C.Foo2
         one/two/c.foo",
    );

    // Limited to one result. We could find either C.Foo2 or c.foo
    let assert_just_one_result_with_option = |option| {
        let output = te.assert_success_and_get_output(".", &[option, "c.foo"]);
        let stdout = String::from_utf8_lossy(&output.stdout)
            .trim()
            .replace(&std::path::MAIN_SEPARATOR.to_string(), "/");
        assert!(stdout == "one/two/C.Foo2" || stdout == "one/two/c.foo");
    };
    assert_just_one_result_with_option("--max-results=1");
    assert_just_one_result_with_option("-1");
}

/// Filenames with non-utf8 paths are passed to the executed program unchanged
///
/// Note:
/// - the test is disabled on Darwin/OSX, since it coerces file names to UTF-8,
///   even when the requested file name is not valid UTF-8.
/// - the test is currently disabled on Windows because I'm not sure how to create
///   invalid UTF-8 files on Windows
#[cfg(all(unix, not(target_os = "macos")))]
#[test]
fn test_exec_invalid_utf8() {
    use std::ffi::OsStr;
    use std::os::unix::ffi::OsStrExt;

    let dirs = &["test1"];
    let files = &[];
    let te = TestEnv::new(dirs, files);

    fs::File::create(
        te.test_root()
            .join(OsStr::from_bytes(b"test1/test_\xFEinvalid.txt")),
    )
    .unwrap();

    te.assert_output_raw(
        &["", "test1/", "--exec", "echo", "{}"],
        b"test1/test_\xFEinvalid.txt\n",
    );

    te.assert_output_raw(
        &["", "test1/", "--exec", "echo", "{/}"],
        b"test_\xFEinvalid.txt\n",
    );

    te.assert_output_raw(&["", "test1/", "--exec", "echo", "{//}"], b"test1\n");

    te.assert_output_raw(
        &["", "test1/", "--exec", "echo", "{.}"],
        b"test1/test_\xFEinvalid\n",
    );

    te.assert_output_raw(
        &["", "test1/", "--exec", "echo", "{/.}"],
        b"test_\xFEinvalid\n",
    );
}

#[test]
fn test_list_details() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    // Make sure we can execute 'fd --list-details' without any errors.
    te.assert_success_and_get_output(".", &["--list-details"]);
}

#[test]
fn test_single_and_multithreaded_execution() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(&["--threads=1", "a.foo"], "a.foo");
    te.assert_output(&["--threads=16", "a.foo"], "a.foo");
}

/// Make sure that fd fails if numeric arguments can not be parsed
#[test]
fn test_number_parsing_errors() {
    let te = TestEnv::new(&[], &[]);

    te.assert_failure(&["--threads=a"]);
    te.assert_failure(&["-j", ""]);
    te.assert_failure(&["--threads=0"]);

    te.assert_failure(&["--min-depth=a"]);
    te.assert_failure(&["--max-depth=a"]);
    te.assert_failure(&["--maxdepth=a"]);
    te.assert_failure(&["--exact-depth=a"]);

    te.assert_failure(&["--max-buffer-time=a"]);

    te.assert_failure(&["--max-results=a"]);
}

#[test_case("--hidden", &["--no-hidden"] ; "hidden")]
#[test_case("--no-ignore", &["--ignore"] ; "no-ignore")]
#[test_case("--no-ignore-vcs", &["--ignore-vcs"] ; "no-ignore-vcs")]
#[test_case("--follow", &["--no-follow"] ; "follow")]
#[test_case("--absolute-path", &["--relative-path"] ; "absolute-path")]
#[test_case("-u", &["--ignore", "--no-hidden"] ; "u")]
#[test_case("-uu", &["--ignore", "--no-hidden"] ; "uu")]
fn test_opposing(flag: &str, opposing_flags: &[&str]) {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    let mut flags = vec![flag];
    flags.extend_from_slice(opposing_flags);
    let out_no_flags = te.assert_success_and_get_normalized_output(".", &[]);
    let out_opposing_flags = te.assert_success_and_get_normalized_output(".", &flags);

    assert_eq!(
        out_no_flags,
        out_opposing_flags,
        "{} should override {}",
        opposing_flags.join(" "),
        flag
    );
}

/// Print error if search pattern starts with a dot and --hidden is not set
/// (Unix only, hidden files on Windows work differently)
#[test]
#[cfg(unix)]
fn test_error_if_hidden_not_set_and_pattern_starts_with_dot() {
    let te = TestEnv::new(&[], &[".gitignore", ".whatever", "non-hidden"]);

    te.assert_failure(&["^\\.gitignore"]);
    te.assert_failure(&["--glob", ".gitignore"]);

    te.assert_output(&["--hidden", "^\\.gitignore"], ".gitignore");
    te.assert_output(&["--hidden", "--glob", ".gitignore"], ".gitignore");
    te.assert_output(&[".gitignore"], "");
}

#[test]
fn test_strip_cwd_prefix() {
    let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);

    te.assert_output(
        &["--strip-cwd-prefix", "."],
        "a.foo
        e1 e2
        one/
        one/b.foo
        one/two/
        one/two/c.foo
        one/two/C.Foo2
        one/two/three/
        one/two/three/d.foo
        one/two/three/directory_foo/
        symlink",
    );
}

/// When fd is ran from a non-existent working directory, but an existent
/// directory is passed in the arguments, it should still run fine
#[test]
#[cfg(not(windows))]
fn test_invalid_cwd() {
    let te = TestEnv::new(&[], &[]);

    let root = te.test_root().join("foo");
    fs::create_dir(&root).unwrap();
    std::env::set_current_dir(&root).unwrap();
    fs::remove_dir(&root).unwrap();

    let output = std::process::Command::new(te.test_exe())
        .arg("query")
        .arg(te.test_root())
        .output()
        .unwrap();

    if !output.status.success() {
        panic!("{:?}", output);
    }
}