Catch2 compatibility means the API tests are written in: the macros, such as TEST_CASE and REQUIRE, and the Catch:: namespace. It does not mean Catch2's build names or header paths. find_package(Catch2) found Catch3, and a project using both frameworks met two packages, two sets of targets, two Catch.cmake modules and two catch2/ header trees with the same names. Build names: - CMake: project and package Catch3, targets Catch3::Catch3 and Catch3::Catch3WithMain, libraries Catch3 and Catch3Main, options CATCH3_*, lib/cmake/Catch3 with Catch3Config, and pkg-config catch3 and catch3-with-main. The version is Catch3's, 0.3.0, compatible within a minor version. - The CMake scripts are Catch3.cmake (catch3_discover_tests), Catch3AddTests.cmake and Catch3ShardTests.cmake (catch3_add_sharded_tests); the helpers they define at ctest time have a catch3_ prefix. ParseAndAddCatchTests.cmake, deprecated upstream, is gone. - Bazel //:catch3 and //:catch3_main, Meson catch3 and catch3-with-main (with override_dependency), Xmake catch3 and catch3_main, Premake Catch3 and Catch3WithMain. Visual Studio projects get GUIDs of their own. - The Progmasoft::Catch3 target and package are gone: property testing and snapshots are part of Catch3::Catch3. Their sources now build with the library's warning flags, so property failures are built field by field (no missing initializers) and the default property name is a thread-local pointer to the name its scope owns (no global destructor). Headers: the engine moved from src/catch2 to src/Progmasoft/Catch3 with Progmasoft names, so <catch2/catch_test_macros.hpp> is <Progmasoft/Catch3/TestMacros.hpp>, <catch2/matchers/catch_matchers_string.hpp> is <Progmasoft/Catch3/Matchers/String.hpp>, and interface headers are named after their interface, such as Interfaces/IConfig.hpp. Include guards became #pragma once. The installed headers go to include/Progmasoft. src/Progmasoft/Context.cpp is StrategyContext.cpp, so no two sources share a file name. tools/scripts/upstreamFiles.txt lists the files that come from Catch2. The license check expects BSL-1.0 on them and Progmasoft's header on the rest of src/Progmasoft; the convenience-header check, the amalgamation script and the surrogate tests take the engine's headers from it. The amalgamated files are regenerated. The header-guard workflow checks for #pragma once instead of checkguard. Documents, the README and the release notes describe the new names.
Listeners that print while they are created raced with the first test: the text went through the worker's error stream and could reach the runner after it had given the worker a test, which then claimed it as its own output. The worker now captures Catch2's standard streams while it creates the listeners and starts the run, sends the text in its hello message, and the runner writes it to its standard error. Catch2's stream redirect now remembers the buffer to restore when a redirect starts rather than when it is made, so a stream whose buffer changed in between is restored to the right one.
A test that called exit() crashed its worker with SIGSEGV on Linux and macOS. The exit hook read Catch2's captured output through a scoped deactivation, which switched the capture back on; libstdc++ then flushed std::cout at exit into a capture buffer that static destruction had already freed. RunContext::endCapture() now ends the capture for good and returns what it held, so the standard streams are their own again. A JUnit, JSON or trace report that could not be written was only reported on stderr, and a run whose tests passed still exited with 0, so a build server could miss it. Such a run now exits with 1; failed tests still exit with 42. Integration tests of the runner's output move their helpers into RunnerFixtureClient.hpp and cover --version, --help, the listing modes, a bad option, exit codes 1 to 4, -v, -q, --slowest, colours, --analytics in text and JSON, and Bazel's test environment.
Catch3 keeps Catch2's API for writing tests (test cases, sections, assertions, matchers, generators, listeners, benchmarks) and replaces its session, command line and reporters with a runner of its own. The runner starts the test binary again as worker processes that take the next test when they are free. A crash, an exit or a hang ends one test, not the run. On top of that it adds: - retries that tell deterministic, flaky and order-dependent failures apart, and a bisection that names the test leaving state behind; - a history of verdicts and durations, kept under a file lock, that drives automatic quarantine, adaptive time limits, predictive ordering, incremental runs, failure replay and analytics; - selection by change, past failure or prediction, dependency closure, and sharding by a stable hash or by recorded durations; - tags for serial and isolated tests, shared resources, dependencies, time limits and retries; - a failure category, a signature, an analysis and a replay command for every failure; - console, JUnit XML (with flakyFailure and rerunFailure), JSON and Chrome trace reports, and a versioned discovery listing (--list=json); - a temporary directory per test (TMPDIR, TMP, TEMP and TestTemporaryDirectory()); - Bazel's test environment: XML output file, test filter, sharding, seed, premature exit file and undeclared outputs. The command line is parsed by a hand-written, typed parser. Catch::Session remains as a thin facade over the runner for custom main functions. The result model in Progmasoft/Catch3/Results.hpp was rewritten around tests and attempts, and the JUnit writer now writes it. The property engine's example database is updated under a file lock with an atomic rename, so parallel workers can write it at the same time. Removed: Clara, the command-line and reporter-spec parsers, every reporter and CATCH_REGISTER_REPORTER, listing, text flow, console colour and width, the JSON and XML writers, sharding in the test registry, approval tests and their baselines, Conan packaging, and the unused third_party/clara.hpp. Listeners keep working; reporters' list and skip events are gone. The Catch2 library is now compiled as C++20; code that includes only Catch2's headers still needs C++14. Duplicate test cases are still refused at start-up. Version 0.3.0. ExtraTests now turn exceptions off for clang-cl with MSVC-style options, which -fno-exceptions did not do.
Review Catch2 devel through 08092139210881f01a34e60c5f2fd6afa0ea4024, the commit of 3.16.1, and apply the eleven changes since the last reviewed revision in upstream order: d7683484 better message when a reporter cannot be initialized ea5020f0 custom argument validation in every first-party reporter aa01559e throwing-reporter test also throws in assertionEnded 45cd3987 noexcept on handleUnexpectedInflightException 6adbd539 MSVC optimizations enabled again after the benchmark headers e87f2882 no quadratic scaling for NTTP test registration 73d546cd REQUIRE expands its arguments fewer times under GCC and Clang b710039a decomposer operators as plain functions f899467b type-erased streaming of reconstructed expressions 8f0e70ca retired macos-14 runner dropped 08092139 version 3.16.1 and its release notes All of them applied to the sources without a conflict. The amalgamated distribution under extras/ conflicted because it is generated; it is generated again from the sources of this repository, which also brings it up to date with fork changes it had not picked up: the list-based stream pool, the Clang diagnostic boundary and the cassert include. No file under src/Progmasoft changes. The fork-owned texts that name the engine version say 3.16.1, and docs/upstream-status.md records the review. Upstream files keep their names, licenses and compiler options. Built with Clang 22 on Windows and tested: 148 of 149 tests pass. The one that fails, Reporters::CrashInJunitReporter, fails the same way on devel without this change with that compiler.
Review Catch2 devel through 222e233903d287cda4713fb08e1a959e8d71fd6d. Add the direct cassert dependency to the range generator and preserve the upstream Clang pointer-to-bool diagnostic boundary in reusable streams. Record reviewed upstream revisions without changing compiler options, licensing, or fork-owned APIs.
Three misspellings in comments: "reuired" -> "required", "ambigous" -> "ambiguous", "neccessarily" -> "necessarily". Per docs/contributing.md, the amalgamated files under extras/ are left untouched even though they carry the same typos. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>