xwc 0.4.0

A small wc-style command line tool
Documentation 
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use std::fs;

use assert_cmd::Command;

#[test]
fn default_output_is_left_aligned_with_headings() {
    let mut cmd = Command::cargo_bin("xwc").unwrap();

    cmd.write_stdin("one two\nthree\n")
        .assert()
        .success()
        .stdout("lines  bytes\n2      14\n");
}

#[test]
fn include_words_adds_a_left_aligned_word_column() {
    let mut cmd = Command::cargo_bin("xwc").unwrap();

    cmd.arg("--include-words")
        .write_stdin("one two\nthree\n")
        .assert()
        .success()
        .stdout("lines  words  bytes\n2      3      14\n");
}

#[test]
fn include_chars_adds_a_left_aligned_char_column() {
    let mut cmd = Command::cargo_bin("xwc").unwrap();

    cmd.arg("--include-chars")
        .write_stdin("café\n")
        .assert()
        .success()
        .stdout("lines  chars  bytes\n1      5      6\n");
}

#[test]
fn words_option_counts_words() {
    let mut cmd = Command::cargo_bin("xwc").unwrap();

    cmd.arg("--words")
        .write_stdin("one two\nthree\n")
        .assert()
        .success()
        .stdout("3\n");
}

#[test]
fn chars_option_counts_utf8_characters() {
    let mut cmd = Command::cargo_bin("xwc").unwrap();

    cmd.arg("--chars")
        .write_stdin("café\n")
        .assert()
        .success()
        .stdout("5\n");
}

#[test]
fn chars_and_bytes_can_be_counted_together() {
    let mut cmd = Command::cargo_bin("xwc").unwrap();

    cmd.arg("-mc")
        .write_stdin("café\n")
        .assert()
        .success()
        .stdout("5  6\n");
}

#[test]
fn human_readable_default_output_uses_size_heading() {
    let mut cmd = Command::cargo_bin("xwc").unwrap();

    cmd.arg("-h")
        .write_stdin("one two\nthree\n")
        .assert()
        .success()
        .stdout("lines  size\n2      14B\n");
}

#[test]
fn glob_option_counts_matching_files() {
    let directory = tempfile::tempdir().unwrap();
    let path_b = directory.path().join("b.txt");
    let path_a = directory.path().join("a.txt");
    fs::write(&path_b, "one\n").unwrap();
    fs::write(&path_a, "two\nthree\n").unwrap();
    let pattern = directory
        .path()
        .join("*.txt")
        .to_string_lossy()
        .into_owned();
    let path_a = path_a.to_string_lossy();
    let path_b = path_b.to_string_lossy();
    let expected = format!(
        "lines  bytes  file\n2      10     {path_a}\n1      4      {path_b}\n3      14     total\n"
    );
    let mut cmd = Command::cargo_bin("xwc").unwrap();

    cmd.arg("--glob")
        .arg(pattern)
        .assert()
        .success()
        .stdout(expected);
}