use crate::common::util::*;

#[test]
fn test_count_bytes_large_stdin() {
    for &n in &[
        0,
        1,
        42,
        16 * 1024 - 7,
        16 * 1024 - 1,
        16 * 1024,
        16 * 1024 + 1,
        16 * 1024 + 3,
        32 * 1024,
        64 * 1024,
        80 * 1024,
        96 * 1024,
        112 * 1024,
        128 * 1024,
    ] {
        let data = vec_of_size(n);
        let expected = format!("{}\n", n);
        new_ucmd!()
            .args(&["-c"])
            .pipe_in(data)
            .succeeds()
            .stdout_is_bytes(&expected.as_bytes());
    }
}

#[test]
fn test_stdin_default() {
    new_ucmd!()
        .pipe_in_fixture("lorem_ipsum.txt")
        .run()
        .stdout_is(" 13 109 772\n");
}

#[test]
fn test_stdin_explicit() {
    new_ucmd!()
        .pipe_in_fixture("lorem_ipsum.txt")
        .arg("-")
        .run()
        .stdout_is(" 13 109 772 -\n");
}

#[test]
fn test_utf8() {
    new_ucmd!()
        .args(&["-lwmcL"])
        .pipe_in_fixture("UTF_8_test.txt")
        .run()
        .stdout_is("  300  4969 22781 22213    79\n");
    // GNU returns "  300  2086 22219 22781    79"
    // TODO: we should fix that to match GNU's behavior
}

#[test]
fn test_stdin_line_len_regression() {
    new_ucmd!()
        .args(&["-L"])
        .pipe_in("\n123456")
        .run()
        .stdout_is("6\n");
}

#[test]
fn test_stdin_only_bytes() {
    new_ucmd!()
        .args(&["-c"])
        .pipe_in_fixture("lorem_ipsum.txt")
        .run()
        .stdout_is("772\n");
}

#[test]
fn test_stdin_all_counts() {
    new_ucmd!()
        .args(&["-c", "-m", "-l", "-L", "-w"])
        .pipe_in_fixture("alice_in_wonderland.txt")
        .run()
        .stdout_is("  5  57 302 302  66\n");
}

#[test]
fn test_single_default() {
    new_ucmd!()
        .arg("moby_dick.txt")
        .run()
        .stdout_is("  18  204 1115 moby_dick.txt\n");
}

#[test]
fn test_single_only_lines() {
    new_ucmd!()
        .args(&["-l", "moby_dick.txt"])
        .run()
        .stdout_is("18 moby_dick.txt\n");
}

#[test]
fn test_single_all_counts() {
    new_ucmd!()
        .args(&["-c", "-l", "-L", "-m", "-w", "alice_in_wonderland.txt"])
        .run()
        .stdout_is("  5  57 302 302  66 alice_in_wonderland.txt\n");
}

#[test]
fn test_multiple_default() {
    new_ucmd!()
        .args(&[
            "lorem_ipsum.txt",
            "moby_dick.txt",
            "alice_in_wonderland.txt",
        ])
        .run()
        .stdout_is(
            "  13  109  772 lorem_ipsum.txt\n  18  204 1115 moby_dick.txt\n   5   57  302 \
             alice_in_wonderland.txt\n  36  370 2189 total\n",
        );
}

/// Test for an empty file.
#[test]
fn test_file_empty() {
    new_ucmd!()
        .args(&["-clmwL", "emptyfile.txt"])
        .run()
        .stdout_is("0 0 0 0 0 emptyfile.txt\n");
}

/// Test for an file containing a single non-whitespace character
/// *without* a trailing newline.
#[test]
fn test_file_single_line_no_trailing_newline() {
    new_ucmd!()
        .args(&["-clmwL", "notrailingnewline.txt"])
        .run()
        .stdout_is("1 1 2 2 1 notrailingnewline.txt\n");
}

/// Test for a file that has 100 empty lines (that is, the contents of
/// the file are the newline character repeated one hundred times).
#[test]
fn test_file_many_empty_lines() {
    new_ucmd!()
        .args(&["-clmwL", "manyemptylines.txt"])
        .run()
        .stdout_is("100   0 100 100   0 manyemptylines.txt\n");
}

/// Test for a file that has one long line comprising only spaces.
#[test]
fn test_file_one_long_line_only_spaces() {
    new_ucmd!()
        .args(&["-clmwL", "onelongemptyline.txt"])
        .run()
        .stdout_is("    1     0 10001 10001 10000 onelongemptyline.txt\n");
}

/// Test for a file that has one long line comprising a single "word".
#[test]
fn test_file_one_long_word() {
    new_ucmd!()
        .args(&["-clmwL", "onelongword.txt"])
        .run()
        .stdout_is("    1     1 10001 10001 10000 onelongword.txt\n");
}

/// Test that getting counts from a directory is an error.
#[test]
fn test_read_from_directory_error() {
    // TODO To match GNU `wc`, the `stdout` should be:
    //
    //     "      0       0       0 .\n"
    //
    new_ucmd!()
        .args(&["."])
        .fails()
        .stderr_contains(".: Is a directory\n")
        .stdout_is("0 0 0 .\n");
}

/// Test that getting counts from nonexistent file is an error.
#[test]
fn test_read_from_nonexistent_file() {
    new_ucmd!()
        .args(&["bogusfile"])
        .fails()
        .stderr_contains("bogusfile: No such file or directory\n");
}