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4eda97d6bb
json/tests/CMakeLists.txt
Mike Crowe 4eda97d6bb Add clang-tidy plugin for modernize-nlohmann-json-explicit-conversions 
Add a clang-tidy plugin containing one check to replace implicit
conversions (as enabled by default with JSON_USE_IMPLICIT_CONVERSIONS)
with explicit ones. This will make it easier for library users to switch
away from using implicit conversions which should make it possible for
the library to start disallowing them sooner.

Being able to test the plugin in a similar way to how checks are tested
within clang-tidy itself requires copying the check_clang_tidy.py script
from the LLVM code itself.

The check itself is virtually identical to the one proposed for
inclusion in clang-tidy itself at
https://github.com/llvm/llvm-project/pull/126425 .

Unfortunately it is necessary to add "C" to the languages for the
project in CMakeLists.txt for find_package to work for LLVM.

Signed-off-by: Mike Crowe <mac@mcrowe.com>
2025-02-23 19:28:47 +00:00

189 lines
7.4 KiB
CMake
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cmake_minimum_required(VERSION 3.13...3.14)
option(JSON_Valgrind "Execute test suite with Valgrind." OFF)
option(JSON_FastTests "Skip expensive/slow tests." OFF)
set(JSON_32bitTest AUTO CACHE STRING "Enable the 32bit unit test (ON/OFF/AUTO/ONLY).")
set(JSON_TestStandards "" CACHE STRING "The list of standards to test explicitly.")
# using an env var, since this will also affect targets executing cmake (such as "ci_test_compiler_default")
set(JSON_FORCED_GLOBAL_COMPILE_OPTIONS $ENV{JSON_FORCED_GLOBAL_COMPILE_OPTIONS})
if (NOT "" STREQUAL "$ENV{JSON_FORCED_GLOBAL_COMPILE_OPTIONS}")
add_compile_options($ENV{JSON_FORCED_GLOBAL_COMPILE_OPTIONS})
endif()
if (NOT "" STREQUAL "$ENV{JSON_FORCED_GLOBAL_LINK_OPTIONS}")
add_link_options($ENV{JSON_FORCED_GLOBAL_LINK_OPTIONS})
endif()
include(test)
#############################################################################
# override standard support
#############################################################################
# Clang only supports C++17 starting from Clang 5.0
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
unset(compiler_supports_cpp_17)
endif()
# MSVC 2015 (14.0) does not support C++17
if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 19.1)
unset(compiler_supports_cpp_17)
endif()
# Clang C++20 support appears insufficient prior to Clang 9.0 (based on CI build failure)
if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
unset(compiler_supports_cpp_20)
endif()
# GCC started supporting C++20 features in 8.0 but a test for #3070 segfaults prior to 9.0
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0)
unset(compiler_supports_cpp_20)
endif()
#############################################################################
# test_main library with shared code to speed up build and common settings
#############################################################################
add_library(test_main OBJECT src/unit.cpp)
target_compile_definitions(test_main PUBLIC
DOCTEST_CONFIG_SUPER_FAST_ASSERTS
JSON_TEST_KEEP_MACROS
JSON_TEST_USING_MULTIPLE_HEADERS=$<BOOL:${JSON_MultipleHeaders}>)
target_compile_features(test_main PRIVATE cxx_std_11)
target_compile_options(test_main PUBLIC
$<$<CXX_COMPILER_ID:MSVC>:/EHsc;$<$<CONFIG:Release>:/Od>>
# MSVC: Force to always compile with W4
# Disable warning C4566: character represented by universal-character-name '\uFF01'
# cannot be represented in the current code page (1252)
# Disable warning C4996: 'nlohmann::basic_json<...>::operator <<': was declared deprecated
$<$<CXX_COMPILER_ID:MSVC>:/W4 /wd4566 /wd4996>
# https://github.com/nlohmann/json/issues/1114
$<$<CXX_COMPILER_ID:MSVC>:/bigobj> $<$<BOOL:${MINGW}>:-Wa,-mbig-obj>
# https://github.com/nlohmann/json/pull/3229
$<$<CXX_COMPILER_ID:Intel>:-diag-disable=2196>
$<$<NOT:$<CXX_COMPILER_ID:MSVC>>:-Wno-deprecated;-Wno-float-equal>
$<$<CXX_COMPILER_ID:GNU>:-Wno-deprecated-declarations>
$<$<CXX_COMPILER_ID:Intel>:-diag-disable=1786>)
target_include_directories(test_main PUBLIC
thirdparty/doctest
thirdparty/fifo_map
${PROJECT_BINARY_DIR}/include)
target_link_libraries(test_main PUBLIC ${NLOHMANN_JSON_TARGET_NAME})
#############################################################################
# define test- and standard-specific build settings
#############################################################################
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 8.0
AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0 AND NOT MINGW)
# fix for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90050
json_test_set_test_options(all CXX_STANDARDS 17 LINK_LIBRARIES stdc++fs)
endif()
if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# avoid stack overflow, see https://github.com/nlohmann/json/issues/2955
json_test_set_test_options("test-cbor;test-msgpack;test-ubjson;test-bjdata;test-binary_formats" LINK_OPTIONS /STACK:4000000)
endif()
# disable exceptions for test-disabled_exceptions
json_test_set_test_options(test-disabled_exceptions
COMPILE_DEFINITIONS
JSON_NOEXCEPTION
# disabled due to https://github.com/nlohmann/json/discussions/2824
#$<$<CXX_COMPILER_ID:MSVC>:_HAS_EXCEPTIONS=0>
COMPILE_OPTIONS
$<$<CXX_COMPILER_ID:AppleClang>:-fno-exceptions> $<$<CXX_COMPILER_ID:Clang>:-fno-exceptions>
$<$<CXX_COMPILER_ID:GNU>:-fno-exceptions>
$<$<CXX_COMPILER_ID:Intel>:-fno-exceptions> $<$<CXX_COMPILER_ID:IntelLLVM>:-fno-exceptions>
# disabled due to https://github.com/nlohmann/json/discussions/2824
#$<$<CXX_COMPILER_ID:MSVC>:/EH>
)
# raise timeout of expensive Unicode test
json_test_set_test_options(test-unicode4 TEST_PROPERTIES TIMEOUT 3000)
#############################################################################
# add unit tests
#############################################################################
if("${JSON_TestStandards}" STREQUAL "")
set(test_cxx_standards 11 14 17 20 23)
unset(test_force)
else()
set(test_cxx_standards ${JSON_TestStandards})
set(test_force FORCE)
endif()
# Print selected standards marking unavailable ones with brackets
set(msg_standards "")
foreach(cxx_standard ${test_cxx_standards})
if(compiler_supports_cpp_${cxx_standard})
list(APPEND msg_standards ${cxx_standard})
else()
list(APPEND msg_standards [${cxx_standard}])
endif()
endforeach()
string(JOIN " " msg_standards ${msg_standards})
set(msg "Testing standards: ${msg_standards}")
if(test_force)
string(APPEND msg " (forced)")
endif()
message(STATUS "${msg}")
# *DO* use json_test_set_test_options() above this line
json_test_should_build_32bit_test(json_32bit_test json_32bit_test_only "${JSON_32bitTest}")
file(GLOB files src/unit-*.cpp)
if(json_32bit_test_only)
set(files src/unit-32bit.cpp)
elseif(NOT json_32bit_test)
list(FILTER files EXCLUDE REGEX src/unit-32bit.cpp)
endif()
foreach(file ${files})
json_test_add_test_for(${file} MAIN test_main CXX_STANDARDS ${test_cxx_standards} ${test_force})
endforeach()
if(json_32bit_test_only)
# Skip all other tests in this file
return()
endif()
# test legacy comparison of discarded values
json_test_set_test_options(test-comparison_legacy
COMPILE_DEFINITIONS JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON=1
)
json_test_add_test_for(src/unit-comparison.cpp
NAME test-comparison_legacy
MAIN test_main CXX_STANDARDS ${test_cxx_standards} ${test_force}
)
# *DO NOT* use json_test_set_test_options() below this line
#############################################################################
# test ABI compatibility
#############################################################################
add_subdirectory(abi)
if (JSON_ClangTidyPlugin)
add_subdirectory(clang_tidy_plugin)
endif()
#############################################################################
# Test the generated build configs
#############################################################################
# these tests depend on the generated file nlohmann_jsonConfig.cmake
if (JSON_Install)
add_subdirectory(cmake_import)
add_subdirectory(cmake_import_minver)
endif()
add_subdirectory(cmake_add_subdirectory)
add_subdirectory(cmake_fetch_content)
add_subdirectory(cmake_fetch_content2)
add_subdirectory(cmake_target_include_directories)
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