1.9.0 (2025-03-13)

• Add seq, a testable for Seq.t and contramap (#412 @xvw)
• Expose the V1.Skip exception (#415, #416, @Khady)
• BREAKING FIX: match_raises now expects the user-defined function to return true for expected exceptions. Previously false was interpreted as an expected exception. (#418, #419, @psafont)

1.8.0 (2024-07-25)

• Add match_raises, a generalized version of check_raises (#88, #386, @JoanThibault)
• Update JaneStreet core and async to v0.16 (#390 @tmcgilchrist)
• Fix division by zero when size of the terminal is incorrectly reported as zero. (fix #356, #381, @MisterDA)
• Enable terminal size reporting on macOS and Windows. Also report the terminal size even when the test is run buffered by Dune. (#381, #396, @MisterDA)
• Allow overriding the number of columns with ALCOTEST_COLUMNS env var. (#322, #381, @MisterDA)
• Be able to allocate and use user's formatters for stdout/stderr (#399, @dinosaure)
• Stop detecting ocamlci specifically, since there's nothing specific about it. Simply use the CI env var to detect CIs. Improve CI detection. (#397, @MisterDA)

1.7.0 (2023-02-24)

• Allow skipping a test case from inside the test case (#368, @apeschar)
• Fix compilation on bytecode architectures (#335, @glondu)
• Get alcotest_stubs.c to compile with MSVC (#369, @jonahbeckford, review by @TheLortex and @MisterDA)
• Try automatically reporting the location of calls to Alcotest.check. (#366, @MisterDA, review by @TheLortex)
• Detect that Alcotest is running in CI and change output accordingly. (#364, @MisterDA)
• Upgrade to dune >= 3.0. (#360, @MisterDA)

1.6.0 (2022-06-24)

• Fix a bug when running test concurrently. Alcotest could fail to output the content of the log file. (#353, @hhugo)
• Require Cmdliner.1.1.0. (#339, @MisterDA)
• Upgrade to async>=v0.15.0 (#352, @crackcomm)

1.5.0 (2021-10-09)

• Make Alcotest compatible with js_of_ocaml.3.11.0. Users can depend on the new virtual alcotest-js Opam library to pick up the right js_of_ocaml version automatically. (#326 #328, @hhugo @smorimoto)
• Record exception backtraces during test suite runs by default. This behaviour can be disabled by passing ~record_backtrace:false to Alcotest.run. (#317, @CraigFe)
• Generate shorter unique identifiers for test runs (8-character alphanumeric, rather than a full 128-bit UUID). (#304, @CraigFe)
• Change Alcotest.{char,string} pretty-printers to use OCaml syntax on assertion failures (i.e. wrap with quotes and escape control characters). (#318, @CraigFe)
• Fix process for getting the width of attached terminals on MacOS. Previously, a terminal width of 80 columns was assumed. (#325, @CraigFe)
• Fix parsing of test filter ranges to allow '-' separators (e.g. test alpha 1-4), as advertised in the manpage. The previously-used '..' separator is also supported. (#312, @CraigFe)
• Introduce an Alcotest.V1 module that aliases the existing Alcotest API and provides a stability guarantee over major version changes. Similar versioned aliases also exist for the backends: Alcotest_{async,lwt}.V1. (#306, @CraigFe)
• Change the ~filter argument to Alcotest.run to be a predicate over tests. (#305, @CraigFe)

• Renamed / removed some less frequently used modules used by the test backends:

  • Alcotest.Unix -> Alcotest.Unix_platform
  • Alcotest_engine.{Cli,Core,Test} -> Alcotest_engine.V1.{Cli,Core,Test}
  • Alcotest.{Cli,Core} are now gone. Use Alcotest_engine.V1.{Cli,Core}.Make (Alcotest.Unix_platform) instead. (#306 #309, @CraigFe)
• Avoid exporting list_tests in the main test APIs (Alcotest{,_lwt,_async}). Use Alcotest_engine directly if you want this function. (#310, @CraigFe)

1.4.0 (2021-04-15)

• Add ?here and ?pos arguments to the test assertion functions. These can be used to pass information about the location of the call-site, which is displayed in failing test output. (#291, @CraigFe)
• Add a pretty-printer for the exception raised by Alcotest.check and related functions. This allows them to be used outside of an Alcotest test runner for making general assertions. (#296, @CraigFe)
• Add --bail option (and corresponding ALCOTEST_BAIL environment variable), which causes Alcotest to terminate after the first test failure. (#298, @CraigFe)

1.3.0 (2021-02-16)

• Add Alcotest.triple for testing 3-tuples. (#288, @sheepduke)
• Correctly report test suite duration with millisecond precision. (#286, @CraigFe)
• Improve pretty-printing of results to consider the terminal width, fixing several display issues due to line wrapping in small terminals. (#282, @CraigFe)

1.2.3 (2020-09-07)

• Require Dune 2.2. (#274, @CraigFe)
• Fix a bug in the handling of the ~and_exit:false option when the test suite fails. (#271, @CraigFe)

1.2.2 (2020-08-26)

• Fail gracefully when the user supplies an empty suite name. (#265, @CraigFe)
• Fix compatibility with fmt.0.8.8+dune by adding a missing fmt dependency in alcotest's dune file (#266, @NathanReb)
• Only show "in progress" lines when writing to a TTY. (#267, @CraigFe)

1.2.1 (2020-07-15)

• Surround pretty-printed diffs with quotes to make trailing whitespace more obvious. (#261, @CraigFe)
• Allow . characters to appear unescaped in symlinks and test directories. (#259, @CraigFe)

1.2.0 (2020-07-13)

• Add an alcotest-mirage package, allowing the construction of MirageOS unikernels that run Alcotest test suites. (#238, @hannesm @linse)
• Add Alcotest.check', a variant of Alcotest.check with labeled arguments. (#239, @hartmut27)
• Add a testable for the bytes type. (#253, @mefyl)
• Many assorted improvements to Alcotest output formatting. (#246, @CraigFe)
• Default to --color=always when running inside Dune (#242, @CraigFe). The value can be overridden by setting the ALCOTEST_COLOR variable in a dune file, for example:

(env
 (_
  (env-vars
   (ALCOTEST_COLOR auto))))

• Support all UTF-8 characters in test names and suite names, by normalising them for file-system interactions. (#249, @gs0510; #246, @CraigFe)
• Fix various crashes when using non-filesystem-safe characters in test suite names (these break Alcotest when attempting to generate a corresponding log file). (#241, @mefyl; #246 @CraigFe)

1.1.0 (2020-04-03)

• Fix handling of CLI options for Alcotest_{async,lwt}.run. (#222, @CraigFe)
• Fix interleaving of ASSERT outputs with the other test code, and ensure that it is correctly captured in log files. (#215 #228, @icristescu @CraigFe)
• Don't raise Test_exception on Cmdliner parse failure (#234, @CraigFe)

1.0.1 (2020-02-12)

• Add support for an ALCOTEST_COLOR={auto,always,never} environment variable to control the colorization of terminal output. (#209, @mjambon)
• Fix handling of exceptions in Alcotest_{async,lwt}. (#212, @CraigFe @talex5)

1.0.0 (2020-01-14)

• Require OCaml 4.03. (#159, @hannesm)
• Change Alcotest_{async,lwt}.test_case to return monadic values. These must be run with the new Alcotest_{async,lwt}.run functions. See examples/lwt/test.ml for an example of the new API. (#167, @CraigFe)
• Add generation of latest symlinks in the _test directory which point to the most recent test output directory. (#155, @cfcs)
• Allow all CLI options to be passed directly to Alcotest.{run,run_with_args} without use of the argv parameter. (#182, @CraigFe)
• Add --compact option for more concise result reporting. (#149, @andersfugmann)
• Add --tail-errors option for limiting the size of error logs printed to standard output. (#200, @mjambon)
• Add support for executing subsets of tests via the test subcommand. (#158, @CraigFe)
• Change the float check to include equality of isNaN and infinities. See examples/floats.ml for demonstrations of the new semantics. (#152, @psafont)
• Reject test suites with colliding output directories. (#176, @CraigFe)
• Restrict the set of characters allowed in test names to alphanumerics, hyphens, underscores and spaces. (#161, @CraigFe)
• Fix a race condition on creating output directories. (#150, @edwintorok)
• Report test suite durations in real time rather than system time. (#162, @CraigFe)
• Improve documentation of the ?argv parameter. (#164, @ian-barnes)
• Remove version number from test binary help pages. (#186, @CraigFe)
• Remove dependency on tput. (#189, @samoht)
• Remove result dependency. (#159, @hannesm)
• Remove uses of deprecated Pervasives.compare. (#173, @CraigFe)

0.8.5 (2018-12-11)

• Port build to Dune from jbuilder (#139 @samoht)
• Fix output path on Windows/Cygwin (#141 @kkirstein)
• Switch opam metadata to 2.0 format (#144 @samoht)
• Add nice screenshots to the README (#143 @rizo)
• Fix ocamldoc headings to work with odoc (#145 @avsm)
• Do not test on Debian-unstable, add Fedora (#145 @avsm)

0.8.4 (2018-10-17)

• Improve documentation for speed and tests (#129, @raphael-proust)
• Improve documentation on test case filtering and flush error formatter on exit (#133, @edwintorok)
• Create a fresh log sub-dir for every run (#125, @m-harrison)
• Fix wrong location hint for test files when using dune (#135, @m-harrison)

0.8.3 (2018-03-25)

• Show one failure when multiple tests fail (#117, @aantron)

0.8.2 (2017-08-21)

• add Async support: there is a new alcotest-async package containing an Alcotest_async module (#104, @rgrinberg)

0.8.1 (2017-08-03)

• Add failf (#105, @hcarty)
• Relax the float combinator to compare its epsilon using <= instead of <. This allows to use float 0. for "exact" float comparison (#107, @samoht, @talex5)
• Fix outdated displayed information when using --verbose. Be clearer that no new output logs are actually created and do not try to display outdated information (#108, @samoht)

0.8.0 (2017-06-22)

• Format "got" and "expected" values in the same way (#86, @talex5)
• Change the float combinator to take a mandatory 'epsilon' parameter (#89, @superbobry)
• Switch to jbuilder (#92, @rgrinberg)
• Add a test_case function (#94, @samoht)
• Add an alcotest-lwt package, containing an Alcotet_lwt module with an Alcotest_lwt.test_case function to better deal with lwt tests (#94, @talex5, @samoht)
• Add Alcotest.neg to negate test results (#95, @samoht)
• Change the test_case type from unit -> unit to 'a -> unit. The 'a parameter can be built using as a Cmdliner term using the new run_with_args function. This is useful to configure the tests using the CLI (#96, @samoht)

0.7.2 (2016-11-10)

• Clean up handling of env variables (#83, @samoht)

0.7.1 (2016-11-03)

• Store tests output to _build/_tests by default (#77, @pqwy)

0.7.0 (2016-10-25)

• Add a unit testable (useful for functions with side-effects) (#79, @avsm)
• Add a testable combinator to easily build 'a testable values (#75, @pqwy)
• Add pp and equal to extract the pretty-printer and equality functions from an 'a testable (#75, @pqwy)
• Add an array testable (#75, @pqwy)

0.6.0 (2016-06-28)

• Add int32,int64,float testables (#71, @hcarty)

0.5.0 (2016-06-27)

• Use topkg (#68, @samoht)
• Add Alcotest.reject to always fail tests (#64, @talex5)
• Fix pretty-printing of Alcotest.list (#53, #65, @talex5)
• Add an argv optional argument to run to use custom command-line arguments (#63, @dinosaure)
• Fix typo in JSON output (#67, @fxfactorial)
• Use Astring for the unit tests (#62, @hannesm)

0.4.11 (2016-05-11)

• Fix regression introduced in 0.4.8 about alignment of [ERROR] (#60, @samoht)

0.4.10 (2016-05-03)

• Fix support for 4.03 (#58, by @hannesm)

0.4.9 (2016-02-25)

• Add Alcotest.pass a testable combinator which always pass (#50, @seliopou)
• Fix index out of bounds for empty test doc string (#51, @dariusf)
• Display the log directory (@samoht)
• Add missing newline in display header (#53, #54, @samoht)
• Add a --color flag to tweak color usage on the command-line and use Fmt (#52, #55, @samoht)

0.4.8 (2016-03-12)

• Fix check_raises (#48, by @yallop)
• Use Astring (this drops support for 4.00) (@samoht)
• Simplify the build system (@samoht)

0.4.7 (2016-02-22)

• Minimal fix to ensure windows support (#46, by @samoht)

0.4.6 (2015-12-29)

• Add missing newline to verbose output (#36, by @seliopou)
• Result: add Result.result combinator (#37, by @seliopou)
• When redirecting stdout/stderr, use a single fd to share the seek offset (#39, by @dsheets)
• If redirecting output, print error results as well (#39, by @dsheets)

0.4.5 (2015-09.16)

• Add boolean assert: Alcotest.bool (#33, by @zjhmale)
• Add sorted list assert: Alcotest.slist (#34, by @samoht)
• Add pair assert: Alcotest.pair (#34, by @samoht)
• Add simple assert, built using Pervasive.compare and a pretty-printing function: Alcotest.of_pp (#34, by @samoht)

0.4.4 (2015-07-31)

• Fix of the format of log filenames
• Fix a regression in 0.4.* which were hiding error messages when using wrong command-line arguments

0.4.3 (2015-07-22)

• Flush formatter for Alcotest.check (#27, by @edwintorok)
• Handle UTF8 for test documentation strings (#5)

0.4.2 (2015-07-03)

• Improve the result outputs

0.4.1 (2015-07-03)

• Fix regression introduced in 0.4.0: display the error if there is only one error
• Add a testable combinator for options.

0.4.0 (2015-06-29)

• Simplify the use of the library by removing global states -- now calling the run function multiple times is much more consistent.
• Remove the direct dependency to OUnit. Programs using OUnit and Alcotest should continue to work.
• Add a TESTABLE signature and a check function to check invariants in the tested libraries.

0.3.3 (2015-06-19)

• Control --show-errors using the ALCOTEST_SHOW_ERRORS env variable (#9)
• Add an and_exit optional argument to Alcotest.run to control the exit behavior of the main test function (#4)
• Fix the output of --version
• Add a --json argument to show the test results as a JSON object (#14, by @eowzukw)
• Expose Alcotest.result to turn a test into a result

0.3.2: (2015-06-08)

• Do not fail if the output file does not exist
• Add a simple example (#10, by @leowzukw)
• Add a logo (#12, by @leowzukw)

0.3.1 (2015-04-18)

• Fix OCaml 4.01.0 and earlier support (regressed in 0.3.0).
• Add Travis CI tests.

0.3.0 (2015-04-13)

• Fix backtrace handling (#2 by @dsheets)
• Use Bytes module instead of String

0.2.0 (2012-12-19)

• Fix issues with redirections
• Display the full errors when only one test is selected

0.1.0 (2012-12-12)

• Initial release