coreutils/tests/by-util/test_split.rs

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// * This file is part of the uutils coreutils package.
// *
// * For the full copyright and license information, please view the LICENSE
// * file that was distributed with this source code.
// spell-checker:ignore xzaaa sixhundredfiftyonebytes ninetyonebytes threebytes asciilowercase fghij klmno pqrst uvwxyz fivelines twohundredfortyonebytes onehundredlines nbbbb
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use crate::common::util::{AtPath, TestScenario};
use rand::{thread_rng, Rng, SeedableRng};
use regex::Regex;
#[cfg(not(windows))]
use std::env;
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use std::path::Path;
use std::{
fs::{read_dir, File},
io::{BufWriter, Read, Write},
};
fn random_chars(n: usize) -> String {
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thread_rng()
.sample_iter(&rand::distributions::Alphanumeric)
.map(char::from)
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.take(n)
.collect::<String>()
}
struct Glob {
directory: AtPath,
regex: Regex,
}
impl Glob {
fn new(at: &AtPath, directory: &str, regex: &str) -> Self {
Self {
directory: AtPath::new(Path::new(&at.plus_as_string(directory))),
regex: Regex::new(regex).unwrap(),
}
}
fn count(&self) -> usize {
self.collect().len()
}
/// Get all files in `self.directory` that match `self.regex`
fn collect(&self) -> Vec<String> {
read_dir(Path::new(&self.directory.subdir))
.unwrap()
.filter_map(|entry| {
let path = entry.unwrap().path();
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let name = self
.directory
.minus_as_string(path.as_path().to_str().unwrap_or(""));
if self.regex.is_match(&name) {
Some(name)
} else {
None
}
})
.collect()
}
/// Accumulate bytes of all files in `self.collect()`
fn collate(&self) -> Vec<u8> {
let mut files = self.collect();
files.sort();
let mut data: Vec<u8> = vec![];
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for name in &files {
data.extend(self.directory.read_bytes(name));
}
data
}
}
/// File handle that user can add random bytes (line-formatted or not) to
struct RandomFile {
inner: File,
}
impl RandomFile {
/// Size of each line that's being generated
const LINESIZE: usize = 32;
/// `create()` file handle located at `at` / `name`
fn new(at: &AtPath, name: &str) -> Self {
Self {
inner: File::create(at.plus(name)).unwrap(),
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}
}
fn add_bytes(&mut self, bytes: usize) {
// Note that just writing random characters isn't enough to cover all
// cases. We need truly random bytes.
let mut writer = BufWriter::new(&self.inner);
// Seed the rng so as to avoid spurious test failures.
let mut rng = rand::rngs::StdRng::seed_from_u64(123);
let mut buffer = [0; 1024];
let mut remaining_size = bytes;
while remaining_size > 0 {
let to_write = std::cmp::min(remaining_size, buffer.len());
let buf = &mut buffer[..to_write];
rng.fill(buf);
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writer.write_all(buf).unwrap();
remaining_size -= to_write;
}
}
/// Add n lines each of size `RandomFile::LINESIZE`
fn add_lines(&mut self, lines: usize) {
let mut n = lines;
while n > 0 {
writeln!(self.inner, "{}", random_chars(Self::LINESIZE)).unwrap();
n -= 1;
}
}
}
#[test]
fn test_invalid_arg() {
new_ucmd!().arg("--definitely-invalid").fails().code_is(1);
}
#[test]
fn test_split_default() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "split_default";
RandomFile::new(&at, name).add_lines(2000);
ucmd.args(&[name]).succeeds();
let glob = Glob::new(&at, ".", r"x[[:alpha:]][[:alpha:]]$");
assert_eq!(glob.count(), 2);
assert_eq!(glob.collate(), at.read_bytes(name));
}
#[test]
fn test_split_numeric_prefixed_chunks_by_bytes() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "split_num_prefixed_chunks_by_bytes";
RandomFile::new(&at, name).add_bytes(10000);
ucmd.args(&[
"-d", // --numeric-suffixes
"-b", // --bytes
"1000", name, "a",
])
.succeeds();
let glob = Glob::new(&at, ".", r"a\d\d$");
assert_eq!(glob.count(), 10);
for filename in glob.collect() {
assert_eq!(glob.directory.metadata(&filename).len(), 1000);
}
assert_eq!(glob.collate(), at.read_bytes(name));
}
#[test]
fn test_split_str_prefixed_chunks_by_bytes() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "split_str_prefixed_chunks_by_bytes";
RandomFile::new(&at, name).add_bytes(10000);
// Important that this is less than 1024 since that's our internal buffer
// size. Good to test that we don't overshoot.
ucmd.args(&["-b", "1000", name, "b"]).succeeds();
let glob = Glob::new(&at, ".", r"b[[:alpha:]][[:alpha:]]$");
assert_eq!(glob.count(), 10);
for filename in glob.collect() {
assert_eq!(glob.directory.metadata(&filename).len(), 1000);
}
assert_eq!(glob.collate(), at.read_bytes(name));
}
// This is designed to test what happens when the desired part size is not a
// multiple of the buffer size and we hopefully don't overshoot the desired part
// size.
#[test]
fn test_split_bytes_prime_part_size() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "test_split_bytes_prime_part_size";
RandomFile::new(&at, name).add_bytes(10000);
// 1753 is prime and greater than the buffer size, 1024.
ucmd.args(&["-b", "1753", name, "b"]).succeeds();
let glob = Glob::new(&at, ".", r"b[[:alpha:]][[:alpha:]]$");
assert_eq!(glob.count(), 6);
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let mut fns = glob.collect();
// glob.collect() is not guaranteed to return in sorted order, so we sort.
fns.sort();
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#[allow(clippy::needless_range_loop)]
for i in 0..5 {
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assert_eq!(glob.directory.metadata(&fns[i]).len(), 1753);
}
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assert_eq!(glob.directory.metadata(&fns[5]).len(), 1235);
assert_eq!(glob.collate(), at.read_bytes(name));
}
#[test]
fn test_split_num_prefixed_chunks_by_lines() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "split_num_prefixed_chunks_by_lines";
RandomFile::new(&at, name).add_lines(10000);
ucmd.args(&["-d", "-l", "1000", name, "c"]).succeeds();
let glob = Glob::new(&at, ".", r"c\d\d$");
assert_eq!(glob.count(), 10);
assert_eq!(glob.collate(), at.read_bytes(name));
}
#[test]
fn test_split_str_prefixed_chunks_by_lines() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "split_str_prefixed_chunks_by_lines";
RandomFile::new(&at, name).add_lines(10000);
ucmd.args(&["-l", "1000", name, "d"]).succeeds();
let glob = Glob::new(&at, ".", r"d[[:alpha:]][[:alpha:]]$");
assert_eq!(glob.count(), 10);
assert_eq!(glob.collate(), at.read_bytes(name));
}
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#[test]
fn test_split_additional_suffix() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "split_additional_suffix";
RandomFile::new(&at, name).add_lines(2000);
ucmd.args(&["--additional-suffix", ".txt", name]).succeeds();
let glob = Glob::new(&at, ".", r"x[[:alpha:]][[:alpha:]].txt$");
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assert_eq!(glob.count(), 2);
assert_eq!(glob.collate(), at.read_bytes(name));
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}
#[test]
fn test_additional_suffix_no_slash() {
new_ucmd!()
.args(&["--additional-suffix", "a/b"])
.fails()
.usage_error("invalid suffix 'a/b', contains directory separator");
}
// note: the test_filter* tests below are unix-only
// windows support has been waived for now because of the difficulty of getting
// the `cmd` call right
// see https://github.com/rust-lang/rust/issues/29494
#[test]
#[cfg(unix)]
fn test_filter() {
// like `test_split_default()` but run a command before writing
let (at, mut ucmd) = at_and_ucmd!();
let name = "filtered";
let n_lines = 3;
RandomFile::new(&at, name).add_lines(n_lines);
// change all characters to 'i'
ucmd.args(&["--filter=sed s/./i/g > $FILE", name])
.succeeds();
// assert all characters are 'i' / no character is not 'i'
// (assert that command succeeded)
let glob = Glob::new(&at, ".", r"x[[:alpha:]][[:alpha:]]$");
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assert!(!glob.collate().iter().any(|&c| {
// is not i
c != (b'i')
// is not newline
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&& c != (b'\n')
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}));
}
#[test]
#[cfg(unix)]
fn test_filter_with_env_var_set() {
// This test will ensure that if $FILE env var was set before running --filter, it'll stay that
// way
// implemented like `test_split_default()` but run a command before writing
let (at, mut ucmd) = at_and_ucmd!();
let name = "filtered";
let n_lines = 3;
RandomFile::new(&at, name).add_lines(n_lines);
let env_var_value = "some-value";
env::set_var("FILE", env_var_value);
ucmd.args(&[format!("--filter={}", "cat > $FILE").as_str(), name])
.succeeds();
let glob = Glob::new(&at, ".", r"x[[:alpha:]][[:alpha:]]$");
assert_eq!(glob.collate(), at.read_bytes(name));
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assert!(env::var("FILE").unwrap_or_else(|_| "var was unset".to_owned()) == env_var_value);
}
#[test]
#[cfg(unix)]
fn test_filter_command_fails() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "filter-will-fail";
RandomFile::new(&at, name).add_lines(4);
ucmd.args(&["--filter=/a/path/that/totally/does/not/exist", name])
.fails();
}
#[test]
fn test_split_lines_number() {
// Test if stdout/stderr for '--lines' option is correct
let scene = TestScenario::new(util_name!());
let at = &scene.fixtures;
at.touch("file");
scene
.ucmd()
.args(&["--lines", "2", "file"])
.succeeds()
.no_stderr()
.no_stdout();
scene
.ucmd()
.args(&["--lines", "2fb", "file"])
.fails()
.code_is(1)
.stderr_only("split: invalid number of lines: '2fb'\n");
}
#[test]
fn test_split_invalid_bytes_size() {
new_ucmd!()
.args(&["-b", "1024R"])
.fails()
.code_is(1)
.stderr_only("split: invalid number of bytes: '1024R'\n");
#[cfg(not(target_pointer_width = "128"))]
new_ucmd!()
.args(&["-b", "1Y"])
.fails()
.code_is(1)
.stderr_only(
"split: invalid number of bytes: '1Y': Value too large for defined data type\n",
);
#[cfg(target_pointer_width = "32")]
{
let sizes = ["1000G", "10T"];
for size in &sizes {
new_ucmd!().args(&["-b", size]).succeeds();
}
}
}
#[test]
fn test_split_chunks_num_chunks_oversized_32() {
#[cfg(target_pointer_width = "32")]
{
let scene = TestScenario::new(util_name!());
let at = &scene.fixtures;
at.touch("file");
scene
.ucmd()
.args(&["--number", "5000000000", "file"])
.fails()
.code_is(1)
.stderr_only("split: Number of chunks too big\n");
}
}
#[test]
fn test_split_stdin_num_chunks() {
new_ucmd!()
.args(&["--number=1"])
.fails()
.code_is(1)
.stderr_only("split: -: cannot determine file size\n");
}
fn file_read(at: &AtPath, filename: &str) -> String {
let mut s = String::new();
at.open(filename).read_to_string(&mut s).unwrap();
s
}
/// Test for the default suffix length behavior: dynamically increasing size.
#[test]
fn test_alphabetic_dynamic_suffix_length() {
let (at, mut ucmd) = at_and_ucmd!();
// Split into chunks of one byte each.
//
// The input file has (26^2) - 26 + 1 = 651 bytes. This is just
// enough to force `split` to dynamically increase the length of
// the filename for the very last chunk.
//
// We expect the output files to be named
//
// xaa, xab, xac, ..., xyx, xyy, xyz, xzaaa
//
ucmd.args(&["-b", "1", "sixhundredfiftyonebytes.txt"])
.succeeds();
for i in b'a'..=b'y' {
for j in b'a'..=b'z' {
let filename = format!("x{}{}", i as char, j as char);
let contents = file_read(&at, &filename);
assert_eq!(contents, "a");
}
}
assert_eq!(file_read(&at, "xzaaa"), "a");
}
/// Test for the default suffix length behavior: dynamically increasing size.
#[test]
fn test_numeric_dynamic_suffix_length() {
let (at, mut ucmd) = at_and_ucmd!();
// Split into chunks of one byte each, use numbers instead of
// letters as file suffixes.
//
// The input file has (10^2) - 10 + 1 = 91 bytes. This is just
// enough to force `split` to dynamically increase the length of
// the filename for the very last chunk.
//
// x00, x01, x02, ..., x87, x88, x89, x9000
//
ucmd.args(&["-d", "-b", "1", "ninetyonebytes.txt"])
.succeeds();
for i in 0..90 {
let filename = format!("x{i:02}");
let contents = file_read(&at, &filename);
assert_eq!(contents, "a");
}
assert_eq!(file_read(&at, "x9000"), "a");
}
#[test]
fn test_hex_dynamic_suffix_length() {
let (at, mut ucmd) = at_and_ucmd!();
// Split into chunks of one byte each, use hexadecimal digits
// instead of letters as file suffixes.
//
// The input file has (16^2) - 16 + 1 = 241 bytes. This is just
// enough to force `split` to dynamically increase the length of
// the filename for the very last chunk.
//
// x00, x01, x02, ..., xed, xee, xef, xf000
//
ucmd.args(&["-x", "-b", "1", "twohundredfortyonebytes.txt"])
.succeeds();
for i in 0..240 {
let filename = format!("x{i:02x}");
let contents = file_read(&at, &filename);
assert_eq!(contents, "a");
}
assert_eq!(file_read(&at, "xf000"), "a");
}
#[test]
fn test_suffixes_exhausted() {
new_ucmd!()
.args(&["-b", "1", "-a", "1", "asciilowercase.txt"])
.fails()
.stderr_only("split: output file suffixes exhausted\n");
}
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#[test]
fn test_verbose() {
new_ucmd!()
.args(&["-b", "5", "--verbose", "asciilowercase.txt"])
.succeeds()
.stdout_only(
"creating file 'xaa'
creating file 'xab'
creating file 'xac'
creating file 'xad'
creating file 'xae'
creating file 'xaf'
",
);
}
#[test]
fn test_number() {
let (at, mut ucmd) = at_and_ucmd!();
let file_read = |f| {
let mut s = String::new();
at.open(f).read_to_string(&mut s).unwrap();
s
};
ucmd.args(&["-n", "5", "asciilowercase.txt"]).succeeds();
assert_eq!(file_read("xaa"), "abcde");
assert_eq!(file_read("xab"), "fghij");
assert_eq!(file_read("xac"), "klmno");
assert_eq!(file_read("xad"), "pqrst");
assert_eq!(file_read("xae"), "uvwxyz\n");
}
#[test]
fn test_split_number_with_io_blksize() {
let (at, mut ucmd) = at_and_ucmd!();
let file_read = |f| {
let mut s = String::new();
at.open(f).read_to_string(&mut s).unwrap();
s
};
ucmd.args(&["-n", "5", "asciilowercase.txt", "---io-blksize", "1024"])
.succeeds();
assert_eq!(file_read("xaa"), "abcde");
assert_eq!(file_read("xab"), "fghij");
assert_eq!(file_read("xac"), "klmno");
assert_eq!(file_read("xad"), "pqrst");
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assert_eq!(file_read("xae"), "uvwxyz\n");
}
#[test]
fn test_split_default_with_io_blksize() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "split_default_with_io_blksize";
RandomFile::new(&at, name).add_lines(2000);
ucmd.args(&[name, "---io-blksize", "2M"]).succeeds();
let glob = Glob::new(&at, ".", r"x[[:alpha:]][[:alpha:]]$");
assert_eq!(glob.count(), 2);
assert_eq!(glob.collate(), at.read_bytes(name));
}
#[test]
fn test_invalid_suffix_length() {
new_ucmd!()
.args(&["-a", "xyz"])
.fails()
.no_stdout()
.stderr_contains("invalid suffix length: 'xyz'");
}
#[test]
fn test_include_newlines() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-l", "2", "fivelines.txt"]).succeeds();
let mut s = String::new();
at.open("xaa").read_to_string(&mut s).unwrap();
assert_eq!(s, "1\n2\n");
let mut s = String::new();
at.open("xab").read_to_string(&mut s).unwrap();
assert_eq!(s, "3\n4\n");
let mut s = String::new();
at.open("xac").read_to_string(&mut s).unwrap();
assert_eq!(s, "5\n");
}
#[test]
fn test_allow_empty_files() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-n", "4", "threebytes.txt"])
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("xaa"), "a");
assert_eq!(at.read("xab"), "b");
assert_eq!(at.read("xac"), "c");
assert_eq!(at.read("xad"), "");
}
#[test]
fn test_elide_empty_files() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-e", "-n", "4", "threebytes.txt"])
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("xaa"), "a");
assert_eq!(at.read("xab"), "b");
assert_eq!(at.read("xac"), "c");
assert!(!at.plus("xad").exists());
}
#[test]
#[cfg(unix)]
fn test_elide_dev_null() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-e", "-n", "3", "/dev/null"])
.succeeds()
.no_stdout()
.no_stderr();
assert!(!at.plus("xaa").exists());
assert!(!at.plus("xab").exists());
assert!(!at.plus("xac").exists());
}
#[test]
fn test_lines() {
let (at, mut ucmd) = at_and_ucmd!();
let file_read = |f| {
let mut s = String::new();
at.open(f).read_to_string(&mut s).unwrap();
s
};
// Split into two files without splitting up lines.
ucmd.args(&["-n", "l/2", "fivelines.txt"]).succeeds();
assert_eq!(file_read("xaa"), "1\n2\n3\n");
assert_eq!(file_read("xab"), "4\n5\n");
}
#[test]
fn test_lines_kth() {
new_ucmd!()
.args(&["-n", "l/3/10", "onehundredlines.txt"])
.succeeds()
.stdout_only("20\n21\n22\n23\n24\n25\n26\n27\n28\n29\n");
}
#[test]
fn test_line_bytes() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-C", "8", "letters.txt"]).succeeds();
assert_eq!(at.read("xaa"), "aaaaaaaa");
assert_eq!(at.read("xab"), "a\nbbbb\n");
assert_eq!(at.read("xac"), "cccc\ndd\n");
assert_eq!(at.read("xad"), "ee\n");
}
#[test]
fn test_line_bytes_no_final_newline() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-C", "2"])
.pipe_in("1\n2222\n3\n4")
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("xaa"), "1\n");
assert_eq!(at.read("xab"), "22");
assert_eq!(at.read("xac"), "22");
assert_eq!(at.read("xad"), "\n");
assert_eq!(at.read("xae"), "3\n");
assert_eq!(at.read("xaf"), "4");
}
#[test]
fn test_line_bytes_no_empty_file() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-C", "1"])
.pipe_in("1\n2222\n3\n4")
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("xaa"), "1");
assert_eq!(at.read("xab"), "\n");
assert_eq!(at.read("xac"), "2");
assert_eq!(at.read("xad"), "2");
assert_eq!(at.read("xae"), "2");
assert_eq!(at.read("xaf"), "2");
assert_eq!(at.read("xag"), "\n");
assert_eq!(at.read("xah"), "3");
assert_eq!(at.read("xai"), "\n");
assert_eq!(at.read("xaj"), "4");
assert!(!at.plus("xak").exists());
}
#[test]
fn test_line_bytes_no_eof() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-C", "3"])
.pipe_in("1\n2222\n3\n4")
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("xaa"), "1\n");
assert_eq!(at.read("xab"), "222");
assert_eq!(at.read("xac"), "2\n");
assert_eq!(at.read("xad"), "3\n");
assert_eq!(at.read("xae"), "4");
assert!(!at.plus("xaf").exists());
}
#[test]
fn test_guard_input() {
let ts = TestScenario::new(util_name!());
let at = &ts.fixtures;
ts.ucmd()
.args(&["-C", "6"])
.pipe_in("1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n")
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("xaa"), "1\n2\n3\n");
ts.ucmd()
.args(&["-C", "6"])
.pipe_in("1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n")
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("xaa"), "1\n2\n3\n");
ts.ucmd()
.args(&["-C", "6", "xaa"])
.fails()
.stderr_only("split: 'xaa' would overwrite input; aborting\n");
assert_eq!(at.read("xaa"), "1\n2\n3\n");
}
#[test]
fn test_multiple_of_input_chunk() {
let (at, mut ucmd) = at_and_ucmd!();
let name = "multiple_of_input_chunk";
RandomFile::new(&at, name).add_bytes(16 * 1024);
ucmd.args(&["-b", "8K", name, "b"]).succeeds();
let glob = Glob::new(&at, ".", r"b[[:alpha:]][[:alpha:]]$");
assert_eq!(glob.count(), 2);
for filename in glob.collect() {
assert_eq!(glob.directory.metadata(&filename).len(), 8 * 1024);
}
assert_eq!(glob.collate(), at.read_bytes(name));
}
#[test]
fn test_numeric_suffix() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-n", "4", "--numeric-suffixes", "9", "threebytes.txt"])
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("x09"), "a");
assert_eq!(at.read("x10"), "b");
assert_eq!(at.read("x11"), "c");
assert_eq!(at.read("x12"), "");
}
#[test]
fn test_hex_suffix() {
let (at, mut ucmd) = at_and_ucmd!();
ucmd.args(&["-n", "4", "--hex-suffixes", "9", "threebytes.txt"])
.succeeds()
.no_stdout()
.no_stderr();
assert_eq!(at.read("x09"), "a");
assert_eq!(at.read("x0a"), "b");
assert_eq!(at.read("x0b"), "c");
assert_eq!(at.read("x0c"), "");
}
#[test]
fn test_round_robin() {
let (at, mut ucmd) = at_and_ucmd!();
let file_read = |f| {
let mut s = String::new();
at.open(f).read_to_string(&mut s).unwrap();
s
};
ucmd.args(&["-n", "r/2", "fivelines.txt"]).succeeds();
assert_eq!(file_read("xaa"), "1\n3\n5\n");
assert_eq!(file_read("xab"), "2\n4\n");
}
#[test]
fn test_split_invalid_input() {
// Test if stdout/stderr for '--lines' option is correct
let scene = TestScenario::new(util_name!());
let at = &scene.fixtures;
at.touch("file");
scene
.ucmd()
.args(&["--lines", "0", "file"])
.fails()
.no_stdout()
.stderr_contains("split: invalid number of lines: 0");
scene
.ucmd()
.args(&["-C", "0", "file"])
.fails()
.no_stdout()
.stderr_contains("split: invalid number of bytes: 0");
scene
.ucmd()
.args(&["-b", "0", "file"])
.fails()
.no_stdout()
.stderr_contains("split: invalid number of bytes: 0");
scene
.ucmd()
.args(&["-n", "0", "file"])
.fails()
.no_stdout()
.stderr_contains("split: invalid number of chunks: 0");
}