Parsing C++ with regex in CMake is error prone and regularly leads to silently
dropped (not run) test cases.
Going forward the function `catch_discover_tests` from `contrib/CMake.cmake`
should be used.
For more information see https://github.com/catchorg/Catch2/issues/2092#issuecomment-747342765
It should provide a shared impl for all targets that need to link
against Catch2's implementation. However, due to limitations of
C++ linking and Catch2's v2 implementation, this is only experimental
and might not work under some circumstances.
A test runner already has a --durations option to print durations.
However, this isn't entirely satisfactory.
When there are many tests, this produces output spam which makes it hard
to find the test failure output. Nevertheless, it is helpful to be
informed of tests which are unusually slow.
Therefore, introduce a new option --min-duration that causes all
durations above a certain threshold to be printed. This allows slow
tests to be visible without mentioning every test.
There are some examples on issue #850 of using this feature, but they
are not easily found from the documentation. Adding them here as an
example makes them more findable and ensures they keep working if the
API changes.
--- Fixes ---
* Vector matchers now support initializer list literals better
--- Improvements ---
* Added support for `^` (bitwise xor) to `CHECK` and `REQUIRE`
--- Improvements ---
* Running tests in random order (`--order rand`) has been reworked significantly (#1908)
* Given same seed, all platforms now produce the same order
* Given same seed, the relative order of tests does not change if you select only a subset of them
* Vector matchers support custom allocators (#1909)
* `|` and `&` (bitwise or and bitwise and) are now supported in `CHECK` and `REQUIRE`
* The resulting type must be convertible to `bool`
--- Fixes ---
* Fixed computation of benchmarking column widths in ConsoleReporter (#1885, #1886)
* Suppressed clang-tidy's `cppcoreguidelines-pro-type-vararg` in assertions (#1901)
* It was a false positive trigered by the new warning support workaround
* Fixed bug in test specification parser handling of OR'd patterns using escaping (#1905)
--- Miscellaneous ---
* Worked around IBM XL's codegen bug (#1907)
* It would emit code for _destructors_ of temporaries in an unevaluated context
* Improved detection of stdlib's support for `std::uncaught_exceptions` (#1911)
Given that in the 2 or so years that matchers are thing nobody complained,
it seems that people do not actually write this sort of code, and the
possibility will be removed in v3. However, to avoid correctness bugs,
we will have to support this weird code in v2.
