cargo_test_support/compare.rs
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960
//! Routines for comparing and diffing output.
//!
//! # Deprecated comparisons
//!
//! Cargo's tests are in transition from internal-only pattern and normalization routines used in
//! asserts like [`crate::Execs::with_stdout_contains`] to [`assert_e2e`] and [`assert_ui`].
//!
//! ## Patterns
//!
//! Many of these functions support special markup to assist with comparing
//! text that may vary or is otherwise uninteresting for the test at hand. The
//! supported patterns are:
//!
//! - `[..]` is a wildcard that matches 0 or more characters on the same line
//! (similar to `.*` in a regex). It is non-greedy.
//! - `[EXE]` optionally adds `.exe` on Windows (empty string on other
//! platforms).
//! - `[ROOT]` is the path to the test directory's root.
//! - `[CWD]` is the working directory of the process that was run.
//! - There is a wide range of substitutions (such as `[COMPILING]` or
//! `[WARNING]`) to match cargo's "status" output and allows you to ignore
//! the alignment. See the source of `substitute_macros` for a complete list
//! of substitutions.
//! - `[DIRTY-MSVC]` (only when the line starts with it) would be replaced by
//! `[DIRTY]` when `cfg(target_env = "msvc")` or the line will be ignored otherwise.
//! Tests that work around [issue 7358](https://github.com/rust-lang/cargo/issues/7358)
//! can use this to avoid duplicating the `with_stderr` call like:
//! `if cfg!(target_env = "msvc") {e.with_stderr("...[DIRTY]...");} else {e.with_stderr("...");}`.
//!
//! ## Normalization
//!
//! In addition to the patterns described above, the strings are normalized
//! in such a way to avoid unwanted differences. The normalizations are:
//!
//! - Raw tab characters are converted to the string `<tab>`. This is helpful
//! so that raw tabs do not need to be written in the expected string, and
//! to avoid confusion of tabs vs spaces.
//! - Backslashes are converted to forward slashes to deal with Windows paths.
//! This helps so that all tests can be written assuming forward slashes.
//! Other heuristics are applied to try to ensure Windows-style paths aren't
//! a problem.
//! - Carriage returns are removed, which can help when running on Windows.
use crate::cross_compile::try_alternate;
use crate::paths;
use crate::{diff, rustc_host};
use anyhow::{bail, Result};
use snapbox::Data;
use snapbox::IntoData;
use std::fmt;
use std::path::Path;
use std::path::PathBuf;
use std::str;
use url::Url;
/// This makes it easier to write regex replacements that are guaranteed to only
/// get compiled once
macro_rules! regex {
($re:literal $(,)?) => {{
static RE: std::sync::OnceLock<regex::Regex> = std::sync::OnceLock::new();
RE.get_or_init(|| regex::Regex::new($re).unwrap())
}};
}
/// Assertion policy for UI tests
///
/// This emphasizes showing as much content as possible at the cost of more brittleness
///
/// # Snapshots
///
/// Updating of snapshots is controlled with the `SNAPSHOTS` environment variable:
///
/// - `skip`: do not run the tests
/// - `ignore`: run the tests but ignore their failure
/// - `verify`: run the tests
/// - `overwrite`: update the snapshots based on the output of the tests
///
/// # Patterns
///
/// - `[..]` is a character wildcard, stopping at line breaks
/// - `\n...\n` is a multi-line wildcard
/// - `[EXE]` matches the exe suffix for the current platform
/// - `[ROOT]` matches [`paths::root()`][crate::paths::root]
/// - `[ROOTURL]` matches [`paths::root()`][crate::paths::root] as a URL
///
/// # Normalization
///
/// In addition to the patterns described above, text is normalized
/// in such a way to avoid unwanted differences. The normalizations are:
///
/// - Backslashes are converted to forward slashes to deal with Windows paths.
/// This helps so that all tests can be written assuming forward slashes.
/// Other heuristics are applied to try to ensure Windows-style paths aren't
/// a problem.
/// - Carriage returns are removed, which can help when running on Windows.
///
/// # Example
///
/// ```no_run
/// # use cargo_test_support::compare::assert_e2e;
/// # use cargo_test_support::file;
/// # let p = cargo_test_support::project().build();
/// # let stdout = "";
/// assert_e2e().eq(stdout, file!["stderr.term.svg"]);
/// ```
/// ```console
/// $ SNAPSHOTS=overwrite cargo test
/// ```
pub fn assert_ui() -> snapbox::Assert {
let mut subs = snapbox::Redactions::new();
subs.extend(MIN_LITERAL_REDACTIONS.into_iter().cloned())
.unwrap();
add_test_support_redactions(&mut subs);
add_regex_redactions(&mut subs);
snapbox::Assert::new()
.action_env(snapbox::assert::DEFAULT_ACTION_ENV)
.redact_with(subs)
}
/// Assertion policy for functional end-to-end tests
///
/// This emphasizes showing as much content as possible at the cost of more brittleness
///
/// # Snapshots
///
/// Updating of snapshots is controlled with the `SNAPSHOTS` environment variable:
///
/// - `skip`: do not run the tests
/// - `ignore`: run the tests but ignore their failure
/// - `verify`: run the tests
/// - `overwrite`: update the snapshots based on the output of the tests
///
/// # Patterns
///
/// - `[..]` is a character wildcard, stopping at line breaks
/// - `\n...\n` is a multi-line wildcard
/// - `[EXE]` matches the exe suffix for the current platform
/// - `[ROOT]` matches [`paths::root()`][crate::paths::root]
/// - `[ROOTURL]` matches [`paths::root()`][crate::paths::root] as a URL
///
/// # Normalization
///
/// In addition to the patterns described above, text is normalized
/// in such a way to avoid unwanted differences. The normalizations are:
///
/// - Backslashes are converted to forward slashes to deal with Windows paths.
/// This helps so that all tests can be written assuming forward slashes.
/// Other heuristics are applied to try to ensure Windows-style paths aren't
/// a problem.
/// - Carriage returns are removed, which can help when running on Windows.
///
/// # Example
///
/// ```no_run
/// # use cargo_test_support::compare::assert_e2e;
/// # use cargo_test_support::str;
/// # let p = cargo_test_support::project().build();
/// assert_e2e().eq(p.read_lockfile(), str![]);
/// ```
/// ```console
/// $ SNAPSHOTS=overwrite cargo test
/// ```
pub fn assert_e2e() -> snapbox::Assert {
let mut subs = snapbox::Redactions::new();
subs.extend(MIN_LITERAL_REDACTIONS.into_iter().cloned())
.unwrap();
subs.extend(E2E_LITERAL_REDACTIONS.into_iter().cloned())
.unwrap();
add_test_support_redactions(&mut subs);
add_regex_redactions(&mut subs);
snapbox::Assert::new()
.action_env(snapbox::assert::DEFAULT_ACTION_ENV)
.redact_with(subs)
}
fn add_test_support_redactions(subs: &mut snapbox::Redactions) {
let root = paths::root();
// Use `from_file_path` instead of `from_dir_path` so the trailing slash is
// put in the users output, rather than hidden in the variable
let root_url = url::Url::from_file_path(&root).unwrap().to_string();
subs.insert("[ROOT]", root).unwrap();
subs.insert("[ROOTURL]", root_url).unwrap();
subs.insert("[HOST_TARGET]", rustc_host()).unwrap();
if let Some(alt_target) = try_alternate() {
subs.insert("[ALT_TARGET]", alt_target).unwrap();
}
}
fn add_regex_redactions(subs: &mut snapbox::Redactions) {
// For e2e tests
subs.insert(
"[ELAPSED]",
regex!(r"\[FINISHED\].*in (?<redacted>[0-9]+(\.[0-9]+)?(m [0-9]+)?)s"),
)
.unwrap();
// for UI tests
subs.insert(
"[ELAPSED]",
regex!(r"Finished.*in (?<redacted>[0-9]+(\.[0-9]+)?(m [0-9]+)?)s"),
)
.unwrap();
// output from libtest
subs.insert(
"[ELAPSED]",
regex!(r"; finished in (?<redacted>[0-9]+(\.[0-9]+)?(m [0-9]+)?)s"),
)
.unwrap();
subs.insert(
"[FILE_NUM]",
regex!(r"\[(REMOVED|SUMMARY)\] (?<redacted>[1-9][0-9]*) files"),
)
.unwrap();
subs.insert(
"[FILE_SIZE]",
regex!(r"(?<redacted>[0-9]+(\.[0-9]+)?([a-zA-Z]i)?)B\s"),
)
.unwrap();
subs.insert(
"[HASH]",
regex!(r"home/\.cargo/registry/(cache|index|src)/-(?<redacted>[a-z0-9]+)"),
)
.unwrap();
subs.insert(
"[HASH]",
regex!(r"\.cargo/target/(?<redacted>[0-9a-f]{2}/[0-9a-f]{14})"),
)
.unwrap();
subs.insert("[HASH]", regex!(r"/[a-z0-9\-_]+-(?<redacted>[0-9a-f]{16})"))
.unwrap();
subs.insert(
"[AVG_ELAPSED]",
regex!(r"(?<redacted>[0-9]+(\.[0-9]+)?) ns/iter"),
)
.unwrap();
subs.insert(
"[JITTER]",
regex!(r"ns/iter \(\+/- (?<redacted>[0-9]+(\.[0-9]+)?)\)"),
)
.unwrap();
// Following 3 subs redact:
// "1719325877.527949100s, 61549498ns after last build at 1719325877.466399602s"
// "1719503592.218193216s, 1h 1s after last build at 1719499991.982681034s"
// into "[DIRTY_REASON_NEW_TIME], [DIRTY_REASON_DIFF] after last build at [DIRTY_REASON_OLD_TIME]"
subs.insert(
"[TIME_DIFF_AFTER_LAST_BUILD]",
regex!(r"(?<redacted>[0-9]+(\.[0-9]+)?s, (\s?[0-9]+(\.[0-9]+)?(s|ns|h))+ after last build at [0-9]+(\.[0-9]+)?s)"),
)
.unwrap();
}
static MIN_LITERAL_REDACTIONS: &[(&str, &str)] = &[
("[EXE]", std::env::consts::EXE_SUFFIX),
("[BROKEN_PIPE]", "Broken pipe (os error 32)"),
("[BROKEN_PIPE]", "The pipe is being closed. (os error 232)"),
// Unix message for an entity was not found
("[NOT_FOUND]", "No such file or directory (os error 2)"),
// Windows message for an entity was not found
(
"[NOT_FOUND]",
"The system cannot find the file specified. (os error 2)",
),
(
"[NOT_FOUND]",
"The system cannot find the path specified. (os error 3)",
),
("[NOT_FOUND]", "Access is denied. (os error 5)"),
("[NOT_FOUND]", "program not found"),
// Unix message for exit status
("[EXIT_STATUS]", "exit status"),
// Windows message for exit status
("[EXIT_STATUS]", "exit code"),
];
static E2E_LITERAL_REDACTIONS: &[(&str, &str)] = &[
("[RUNNING]", " Running"),
("[COMPILING]", " Compiling"),
("[CHECKING]", " Checking"),
("[COMPLETED]", " Completed"),
("[CREATED]", " Created"),
("[CREATING]", " Creating"),
("[CREDENTIAL]", " Credential"),
("[DOWNGRADING]", " Downgrading"),
("[FINISHED]", " Finished"),
("[ERROR]", "error:"),
("[WARNING]", "warning:"),
("[NOTE]", "note:"),
("[HELP]", "help:"),
("[DOCUMENTING]", " Documenting"),
("[SCRAPING]", " Scraping"),
("[FRESH]", " Fresh"),
("[DIRTY]", " Dirty"),
("[LOCKING]", " Locking"),
("[UPDATING]", " Updating"),
("[UPGRADING]", " Upgrading"),
("[ADDING]", " Adding"),
("[REMOVING]", " Removing"),
("[REMOVED]", " Removed"),
("[UNCHANGED]", " Unchanged"),
("[DOCTEST]", " Doc-tests"),
("[PACKAGING]", " Packaging"),
("[PACKAGED]", " Packaged"),
("[DOWNLOADING]", " Downloading"),
("[DOWNLOADED]", " Downloaded"),
("[UPLOADING]", " Uploading"),
("[UPLOADED]", " Uploaded"),
("[VERIFYING]", " Verifying"),
("[ARCHIVING]", " Archiving"),
("[INSTALLING]", " Installing"),
("[REPLACING]", " Replacing"),
("[UNPACKING]", " Unpacking"),
("[SUMMARY]", " Summary"),
("[FIXED]", " Fixed"),
("[FIXING]", " Fixing"),
("[IGNORED]", " Ignored"),
("[INSTALLED]", " Installed"),
("[REPLACED]", " Replaced"),
("[BUILDING]", " Building"),
("[LOGIN]", " Login"),
("[LOGOUT]", " Logout"),
("[YANK]", " Yank"),
("[OWNER]", " Owner"),
("[MIGRATING]", " Migrating"),
("[EXECUTABLE]", " Executable"),
("[SKIPPING]", " Skipping"),
("[WAITING]", " Waiting"),
("[PUBLISHED]", " Published"),
("[BLOCKING]", " Blocking"),
("[GENERATED]", " Generated"),
("[OPENING]", " Opening"),
];
/// Normalizes the output so that it can be compared against the expected value.
fn normalize_actual(actual: &str, cwd: Option<&Path>) -> String {
// It's easier to read tabs in outputs if they don't show up as literal
// hidden characters
let actual = actual.replace('\t', "<tab>");
if cfg!(windows) {
// Let's not deal with \r\n vs \n on windows...
let actual = actual.replace('\r', "");
normalize_windows(&actual, cwd)
} else {
actual
}
}
/// Normalizes the expected string so that it can be compared against the actual output.
fn normalize_expected(expected: &str, cwd: Option<&Path>) -> String {
let expected = replace_dirty_msvc(expected);
let expected = substitute_macros(&expected);
if cfg!(windows) {
normalize_windows(&expected, cwd)
} else {
let expected = match cwd {
None => expected,
Some(cwd) => expected.replace("[CWD]", &cwd.display().to_string()),
};
let expected = expected.replace("[ROOT]", &paths::root().display().to_string());
expected
}
}
fn replace_dirty_msvc_impl(s: &str, is_msvc: bool) -> String {
if is_msvc {
s.replace("[DIRTY-MSVC]", "[DIRTY]")
} else {
use itertools::Itertools;
let mut new = s
.lines()
.filter(|it| !it.starts_with("[DIRTY-MSVC]"))
.join("\n");
if s.ends_with("\n") {
new.push_str("\n");
}
new
}
}
fn replace_dirty_msvc(s: &str) -> String {
replace_dirty_msvc_impl(s, cfg!(target_env = "msvc"))
}
/// Normalizes text for both actual and expected strings on Windows.
fn normalize_windows(text: &str, cwd: Option<&Path>) -> String {
// Let's not deal with / vs \ (windows...)
let text = text.replace('\\', "/");
// Weirdness for paths on Windows extends beyond `/` vs `\` apparently.
// Namely paths like `c:\` and `C:\` are equivalent and that can cause
// issues. The return value of `env::current_dir()` may return a
// lowercase drive name, but we round-trip a lot of values through `Url`
// which will auto-uppercase the drive name. To just ignore this
// distinction we try to canonicalize as much as possible, taking all
// forms of a path and canonicalizing them to one.
let replace_path = |s: &str, path: &Path, with: &str| {
let path_through_url = Url::from_file_path(path).unwrap().to_file_path().unwrap();
let path1 = path.display().to_string().replace('\\', "/");
let path2 = path_through_url.display().to_string().replace('\\', "/");
s.replace(&path1, with)
.replace(&path2, with)
.replace(with, &path1)
};
let text = match cwd {
None => text,
Some(p) => replace_path(&text, p, "[CWD]"),
};
// Similar to cwd above, perform similar treatment to the root path
// which in theory all of our paths should otherwise get rooted at.
let root = paths::root();
let text = replace_path(&text, &root, "[ROOT]");
text
}
fn substitute_macros(input: &str) -> String {
let mut result = input.to_owned();
for &(pat, subst) in MIN_LITERAL_REDACTIONS {
result = result.replace(pat, subst)
}
for &(pat, subst) in E2E_LITERAL_REDACTIONS {
result = result.replace(pat, subst)
}
result
}
/// Checks that the given string contains the given lines, ignoring the order
/// of the lines.
///
/// See [Patterns](index.html#patterns) for more information on pattern matching.
pub(crate) fn match_unordered(expected: &str, actual: &str, cwd: Option<&Path>) -> Result<()> {
let expected = normalize_expected(expected, cwd);
let actual = normalize_actual(actual, cwd);
let e: Vec<_> = expected.lines().map(|line| WildStr::new(line)).collect();
let mut a: Vec<_> = actual.lines().map(|line| WildStr::new(line)).collect();
// match more-constrained lines first, although in theory we'll
// need some sort of recursive match here. This handles the case
// that you expect "a\n[..]b" and two lines are printed out,
// "ab\n"a", where technically we do match unordered but a naive
// search fails to find this. This simple sort at least gets the
// test suite to pass for now, but we may need to get more fancy
// if tests start failing again.
a.sort_by_key(|s| s.line.len());
let mut changes = Vec::new();
let mut a_index = 0;
let mut failure = false;
use crate::diff::Change;
for (e_i, e_line) in e.into_iter().enumerate() {
match a.iter().position(|a_line| e_line == *a_line) {
Some(index) => {
let a_line = a.remove(index);
changes.push(Change::Keep(e_i, index, a_line));
a_index += 1;
}
None => {
failure = true;
changes.push(Change::Remove(e_i, e_line));
}
}
}
for unmatched in a {
failure = true;
changes.push(Change::Add(a_index, unmatched));
a_index += 1;
}
if failure {
bail!(
"Expected lines did not match (ignoring order):\n{}\n",
diff::render_colored_changes(&changes)
);
} else {
Ok(())
}
}
/// Checks that the given string contains the given contiguous lines
/// somewhere.
///
/// See [Patterns](index.html#patterns) for more information on pattern matching.
pub(crate) fn match_contains(expected: &str, actual: &str, cwd: Option<&Path>) -> Result<()> {
let expected = normalize_expected(expected, cwd);
let actual = normalize_actual(actual, cwd);
let e: Vec<_> = expected.lines().map(|line| WildStr::new(line)).collect();
let a: Vec<_> = actual.lines().map(|line| WildStr::new(line)).collect();
if e.len() == 0 {
bail!("expected length must not be zero");
}
for window in a.windows(e.len()) {
if window == e {
return Ok(());
}
}
bail!(
"expected to find:\n\
{}\n\n\
did not find in output:\n\
{}",
expected,
actual
);
}
/// Checks that the given string does not contain the given contiguous lines
/// anywhere.
///
/// See [Patterns](index.html#patterns) for more information on pattern matching.
pub(crate) fn match_does_not_contain(
expected: &str,
actual: &str,
cwd: Option<&Path>,
) -> Result<()> {
if match_contains(expected, actual, cwd).is_ok() {
bail!(
"expected not to find:\n\
{}\n\n\
but found in output:\n\
{}",
expected,
actual
);
} else {
Ok(())
}
}
/// Checks that the given string contains the given contiguous lines
/// somewhere, and should be repeated `number` times.
///
/// See [Patterns](index.html#patterns) for more information on pattern matching.
pub(crate) fn match_contains_n(
expected: &str,
number: usize,
actual: &str,
cwd: Option<&Path>,
) -> Result<()> {
let expected = normalize_expected(expected, cwd);
let actual = normalize_actual(actual, cwd);
let e: Vec<_> = expected.lines().map(|line| WildStr::new(line)).collect();
let a: Vec<_> = actual.lines().map(|line| WildStr::new(line)).collect();
if e.len() == 0 {
bail!("expected length must not be zero");
}
let matches = a.windows(e.len()).filter(|window| *window == e).count();
if matches == number {
Ok(())
} else {
bail!(
"expected to find {} occurrences of:\n\
{}\n\n\
but found {} matches in the output:\n\
{}",
number,
expected,
matches,
actual
)
}
}
/// Checks that the given string has a line that contains the given patterns,
/// and that line also does not contain the `without` patterns.
///
/// See [Patterns](index.html#patterns) for more information on pattern matching.
///
/// See [`crate::Execs::with_stderr_line_without`] for an example and cautions
/// against using.
pub(crate) fn match_with_without(
actual: &str,
with: &[String],
without: &[String],
cwd: Option<&Path>,
) -> Result<()> {
let actual = normalize_actual(actual, cwd);
let norm = |s: &String| format!("[..]{}[..]", normalize_expected(s, cwd));
let with: Vec<_> = with.iter().map(norm).collect();
let without: Vec<_> = without.iter().map(norm).collect();
let with_wild: Vec<_> = with.iter().map(|w| WildStr::new(w)).collect();
let without_wild: Vec<_> = without.iter().map(|w| WildStr::new(w)).collect();
let matches: Vec<_> = actual
.lines()
.map(WildStr::new)
.filter(|line| with_wild.iter().all(|with| with == line))
.filter(|line| !without_wild.iter().any(|without| without == line))
.collect();
match matches.len() {
0 => bail!(
"Could not find expected line in output.\n\
With contents: {:?}\n\
Without contents: {:?}\n\
Actual stderr:\n\
{}\n",
with,
without,
actual
),
1 => Ok(()),
_ => bail!(
"Found multiple matching lines, but only expected one.\n\
With contents: {:?}\n\
Without contents: {:?}\n\
Matching lines:\n\
{}\n",
with,
without,
itertools::join(matches, "\n")
),
}
}
/// A single line string that supports `[..]` wildcard matching.
pub(crate) struct WildStr<'a> {
has_meta: bool,
line: &'a str,
}
impl<'a> WildStr<'a> {
pub fn new(line: &'a str) -> WildStr<'a> {
WildStr {
has_meta: line.contains("[..]"),
line,
}
}
}
impl<'a> PartialEq for WildStr<'a> {
fn eq(&self, other: &Self) -> bool {
match (self.has_meta, other.has_meta) {
(false, false) => self.line == other.line,
(true, false) => meta_cmp(self.line, other.line),
(false, true) => meta_cmp(other.line, self.line),
(true, true) => panic!("both lines cannot have [..]"),
}
}
}
fn meta_cmp(a: &str, mut b: &str) -> bool {
for (i, part) in a.split("[..]").enumerate() {
match b.find(part) {
Some(j) => {
if i == 0 && j != 0 {
return false;
}
b = &b[j + part.len()..];
}
None => return false,
}
}
b.is_empty() || a.ends_with("[..]")
}
impl fmt::Display for WildStr<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(&self.line)
}
}
impl fmt::Debug for WildStr<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{:?}", self.line)
}
}
pub struct InMemoryDir {
files: Vec<(PathBuf, Data)>,
}
impl InMemoryDir {
pub fn paths(&self) -> impl Iterator<Item = &Path> {
self.files.iter().map(|(p, _)| p.as_path())
}
#[track_caller]
pub fn assert_contains(&self, expected: &Self) {
use std::fmt::Write as _;
let assert = assert_e2e();
let mut errs = String::new();
for (path, expected_data) in &expected.files {
let actual_data = self
.files
.iter()
.find_map(|(p, d)| (path == p).then(|| d.clone()))
.unwrap_or_else(|| Data::new());
if let Err(err) =
assert.try_eq(Some(&path.display()), actual_data, expected_data.clone())
{
let _ = write!(&mut errs, "{err}");
}
}
if !errs.is_empty() {
panic!("{errs}")
}
}
}
impl<P, D> FromIterator<(P, D)> for InMemoryDir
where
P: Into<std::path::PathBuf>,
D: IntoData,
{
fn from_iter<I: IntoIterator<Item = (P, D)>>(files: I) -> Self {
let files = files
.into_iter()
.map(|(p, d)| (p.into(), d.into_data()))
.collect();
Self { files }
}
}
impl<const N: usize, P, D> From<[(P, D); N]> for InMemoryDir
where
P: Into<PathBuf>,
D: IntoData,
{
fn from(files: [(P, D); N]) -> Self {
let files = files
.into_iter()
.map(|(p, d)| (p.into(), d.into_data()))
.collect();
Self { files }
}
}
impl<P, D> From<std::collections::HashMap<P, D>> for InMemoryDir
where
P: Into<PathBuf>,
D: IntoData,
{
fn from(files: std::collections::HashMap<P, D>) -> Self {
let files = files
.into_iter()
.map(|(p, d)| (p.into(), d.into_data()))
.collect();
Self { files }
}
}
impl<P, D> From<std::collections::BTreeMap<P, D>> for InMemoryDir
where
P: Into<PathBuf>,
D: IntoData,
{
fn from(files: std::collections::BTreeMap<P, D>) -> Self {
let files = files
.into_iter()
.map(|(p, d)| (p.into(), d.into_data()))
.collect();
Self { files }
}
}
impl From<()> for InMemoryDir {
fn from(_files: ()) -> Self {
let files = Vec::new();
Self { files }
}
}
/// Create an `impl _ for InMemoryDir` for a generic tuple
///
/// Must pass in names for each tuple parameter for
/// - internal variable name
/// - `Path` type
/// - `Data` type
macro_rules! impl_from_tuple_for_inmemorydir {
($($var:ident $path:ident $data:ident),+) => {
impl<$($path: Into<PathBuf>, $data: IntoData),+> From<($(($path, $data)),+ ,)> for InMemoryDir {
fn from(files: ($(($path, $data)),+,)) -> Self {
let ($($var),+ ,) = files;
let files = [$(($var.0.into(), $var.1.into_data())),+];
files.into()
}
}
};
}
/// Extend `impl_from_tuple_for_inmemorydir`` to generate for the specified tuple and all smaller
/// tuples
macro_rules! impl_from_tuples_for_inmemorydir {
($var1:ident $path1:ident $data1:ident, $($var:ident $path:ident $data:ident),+) => {
impl_from_tuples_for_inmemorydir!(__impl $var1 $path1 $data1; $($var $path $data),+);
};
(__impl $($var:ident $path:ident $data:ident),+; $var1:ident $path1:ident $data1:ident $(,$var2:ident $path2:ident $data2:ident)*) => {
impl_from_tuple_for_inmemorydir!($($var $path $data),+);
impl_from_tuples_for_inmemorydir!(__impl $($var $path $data),+, $var1 $path1 $data1; $($var2 $path2 $data2),*);
};
(__impl $($var:ident $path:ident $data:ident),+;) => {
impl_from_tuple_for_inmemorydir!($($var $path $data),+);
}
}
// Generate for tuples of size `1..=7`
impl_from_tuples_for_inmemorydir!(
s1 P1 D1,
s2 P2 D2,
s3 P3 D3,
s4 P4 D4,
s5 P5 D5,
s6 P6 D6,
s7 P7 D7
);
#[cfg(test)]
mod test {
use snapbox::assert_data_eq;
use snapbox::prelude::*;
use snapbox::str;
use super::*;
#[test]
fn wild_str_cmp() {
for (a, b) in &[
("a b", "a b"),
("a[..]b", "a b"),
("a[..]", "a b"),
("[..]", "a b"),
("[..]b", "a b"),
] {
assert_eq!(WildStr::new(a), WildStr::new(b));
}
for (a, b) in &[("[..]b", "c"), ("b", "c"), ("b", "cb")] {
assert_ne!(WildStr::new(a), WildStr::new(b));
}
}
#[test]
fn dirty_msvc() {
let case = |expected: &str, wild: &str, msvc: bool| {
assert_eq!(expected, &replace_dirty_msvc_impl(wild, msvc));
};
// no replacements
case("aa", "aa", false);
case("aa", "aa", true);
// with replacements
case(
"\
[DIRTY] a",
"\
[DIRTY-MSVC] a",
true,
);
case(
"",
"\
[DIRTY-MSVC] a",
false,
);
case(
"\
[DIRTY] a
[COMPILING] a",
"\
[DIRTY-MSVC] a
[COMPILING] a",
true,
);
case(
"\
[COMPILING] a",
"\
[DIRTY-MSVC] a
[COMPILING] a",
false,
);
// test trailing newline behavior
case(
"\
A
B
", "\
A
B
", true,
);
case(
"\
A
B
", "\
A
B
", false,
);
case(
"\
A
B", "\
A
B", true,
);
case(
"\
A
B", "\
A
B", false,
);
case(
"\
[DIRTY] a
",
"\
[DIRTY-MSVC] a
",
true,
);
case(
"\n",
"\
[DIRTY-MSVC] a
",
false,
);
case(
"\
[DIRTY] a",
"\
[DIRTY-MSVC] a",
true,
);
case(
"",
"\
[DIRTY-MSVC] a",
false,
);
}
#[test]
fn redact_elapsed_time() {
let mut subs = snapbox::Redactions::new();
add_regex_redactions(&mut subs);
assert_data_eq!(
subs.redact("[FINISHED] `release` profile [optimized] target(s) in 5.5s"),
str!["[FINISHED] `release` profile [optimized] target(s) in [ELAPSED]s"].raw()
);
assert_data_eq!(
subs.redact("[FINISHED] `release` profile [optimized] target(s) in 1m 05s"),
str!["[FINISHED] `release` profile [optimized] target(s) in [ELAPSED]s"].raw()
);
}
}