Improve unit testing (Part 1) #3380
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gregmarr
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Add functions for creating tests and to supply test- and
standard-specific build settings.
Raises minimum CMake version to 3.13 in test directory.
json_test_add_test_for(
<file>
MAIN <main>
[CXX_STANDARDS <version_number>...] [FORCE])
Given a <file> unit-foo.cpp, produces
test-foo_cpp<version_number>
if C++ standard <version_number> is supported by the compiler and
thesource file contains JSON_HAS_CPP_<version_number>. Use FORCE to
create the test regardless of the file containing
JSON_HAS_CPP_<version_number>. Test targets are linked against <main>.
CXX_STANDARDS defaults to "11".
json_test_set_test_options(
all|<tests>
[CXX_STANDARDS all|<args>...]
[COMPILE_DEFINITIONS <args>...]
[COMPILE_FEATURES <args>...]
[COMPILE_OPTIONS <args>...]
[LINK_LIBRARIES <args>...]
[LINK_OPTIONS <args>...])
Supply test- and standard-specific build settings.
Specify multiple tests using a list e.g., "test-foo;test-bar".
Must be called BEFORE the test is created.
Incidentally enables the regression tests for nlohmann#2546 and nlohmann#3070. A CHECK_THROWS_WITH_AS in nlohmann#3070 was disabled which is tracked in nlohmann#3377 and a line in from_json(..., std_fs::path&) was marked with LCOV_EXCL_LINE.
Redelcaration of inline constexpr static data members in namespace scope was deprecated in C++17. Fixes -Werror=deprecated compilation failures.
Also change default for JSON_BuildTests option to depend on CMake version.
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This PR refactors the CMake code for creating unit tests (see commit message cac4e9f).
It also removes duplicate macro definitions from unit tests and reuses the ones provided by
json.hpp(see commit message 02138cf). To that end the macroJSON_TEST_KEEP_MACROSis introduced which keeps some macros from being undefined inmacro_unscope.hpp.A new CMake cache variable
JSON_TestStandardsis added to replace-DCMAKE_CXX_STANDARD=<version> -DCMAKE_CXX_STANDARD_REQUIRED=ON.CMake 3.13 has been added to the
ci_cmake_flagstest.Various compilation issues have been fixed. (These could be moved into a separate PR, if desired.)
As described in #3384, some tests had to be disabled. These failures are not caused by this PR but uncovered, since it enables some previously untested configurations.
Documentation may need updating.