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Add deprecation warning in ParseAndCatchTests

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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
This commit is contained in:
Reinhold Gschweicher 2020-12-17 14:02:48 +01:00 committed by Martin Hořeňovský
parent 031a57e7b7
commit 48f220b68a
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3 changed files with 17 additions and 2 deletions
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11
docs/cmake-integration.md
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@ -60,7 +60,7 @@ with automatically registering their `TEST_CASE`s with CTest. They
can be found in the `extras` folder, and are
1) `Catch.cmake` (and its dependency `CatchAddTests.cmake`)
2) `ParseAndAddCatchTests.cmake`
2) `ParseAndAddCatchTests.cmake` (deprecated)
If Catch2 has been installed in system, both of these can be used after
doing `find_package(Catch2 REQUIRED)`. Otherwise you need to add them
@ -179,10 +179,17 @@ the output file name e.g. ".xml".
### `ParseAndAddCatchTests.cmake`
⚠ This script is [deprecated](https://github.com/catchorg/Catch2/pull/2120)
in Catch X.Y.Z and superseded by the above approach using `catch_discover_tests`.
See [#2092](https://github.com/catchorg/Catch2/issues/2092) for details.
`ParseAndAddCatchTests` works by parsing all implementation files
associated with the provided target, and registering them via CTest's
`add_test`. This approach has some limitations, such as the fact that
commented-out tests will be registered anyway.
commented-out tests will be registered anyway. More serious, only a
subset of the assertion macros currently available in Catch can be
detected by this script and tests with any macros that cannot be
parsed are *silently ignored*.
#### Usage

7
docs/deprecations.md
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@ -9,6 +9,13 @@ either of these is a breaking change, and thus will not happen until
at least the next major release.
### `ParseAndAddCatchTests.cmake`
The CMake/CTest integration using `ParseAndAddCatchTests.cmake` is deprecated,
as it can be replaced by `Catch.cmake` that provides the function
`catch_discover_tests` to get tests directly from a CMake target via the
command line interface instead of parsing C++ code with regular expressions.
## Planned changes

1
extras/ParseAndAddCatchTests.cmake
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@ -241,6 +241,7 @@ endfunction()
# entry point
function(ParseAndAddCatchTests TestTarget)
message(DEPRECATION "ParseAndAddCatchTest: function deprecated because of possibility of missed test cases. Consider using 'catch_discover_tests' from 'Catch.cmake'")
ParseAndAddCatchTests_PrintDebugMessage("Started parsing ${TestTarget}")
get_target_property(SourceFiles ${TestTarget} SOURCES)
ParseAndAddCatchTests_PrintDebugMessage("Found the following sources: ${SourceFiles}")