Download test data from an external source during build

.gitignore

@@ -22,4 +22,5 @@ benchmarks/files/numbers/*.json
 cmake-build-debug
 
 test/test-*
+test/data
 /.vs

test/CMakeLists.txt

@@ -1,3 +1,5 @@
+include(ExternalProject)
+
 option(JSON_Sanitizer "Build test suite with Clang sanitizer" OFF)
 option(JSON_Valgrind "Execute test suite with Valgrind" OFF)
 option(JSON_NoExceptions "Build test suite without exceptions" OFF)
@@ -97,6 +99,18 @@ if(MSVC)
 	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /bigobj")
 endif()
 
+if(NOT DEFINED ENV{LGTM_WORKSPACE})
+    ExternalProject_Add(ExternalTestData
+      GIT_REPOSITORY    https://github.com/nickaein/nlohmann-json-testdata.git
+      GIT_TAG           310048a5c34195b935f8062c53f30f3253fc5f50
+      SOURCE_DIR        ${CMAKE_CURRENT_SOURCE_DIR}/data
+      CONFIGURE_COMMAND ""
+      BUILD_COMMAND     ""
+      INSTALL_COMMAND   ""
+      TEST_COMMAND      ""
+    )
+endif()
+
 #############################################################################
 # one executable for each unit test file
 #############################################################################
@@ -107,6 +121,11 @@ foreach(file ${files})
     string(REGEX REPLACE "unit-([^$]+)" "test-\\1" testcase ${file_basename})
 
     add_executable(${testcase} $<TARGET_OBJECTS:doctest_main> ${file})
+
+    if(NOT DEFINED ENV{LGTM_WORKSPACE})
+        add_dependencies(${testcase} ExternalTestData)
+    endif()
+
     target_compile_definitions(${testcase} PRIVATE
       DOCTEST_CONFIG_SUPER_FAST_ASSERTS
     )
@@ -148,3 +167,4 @@ endforeach()
 add_subdirectory(cmake_import)
 add_subdirectory(cmake_import_minver)
 add_subdirectory(cmake_add_subdirectory)
+

test/Makefile

@@ -50,6 +50,19 @@ OBJECTS = $(SOURCES:.cpp=.o)
 
 TESTCASES = $(patsubst src/unit-%.cpp,test-%,$(wildcard src/unit-*.cpp))
 
+
+##############################################################################
+# external test data
+##############################################################################
+
+EXTERNAL_DATA_URL = https://github.com/nickaein/nlohmann-json-testdata.git
+EXTERNAL_DATA_TAG = 310048a5c34195b935f8062c53f30f3253fc5f50
+EXTERNAL_DATA_DIR = data
+
+external_data:
+	@test -d $(EXTERNAL_DATA_DIR) || (echo "Downloading test data..." && git clone $(EXTERNAL_DATA_URL) $(EXTERNAL_DATA_DIR) && cd $@ && git checkout $(EXTERNAL_DATA_TAG) && cd ..) || exit 1;
+
+
 ##############################################################################
 # main rules
 ##############################################################################
@@ -82,7 +95,7 @@ test-%: src/unit-%.o src/unit.o ../single_include/nlohmann/json.hpp thirdparty/d
 
 TEST_PATTERN ?= "*"
 TEST_PREFIX = ""
-check: $(OBJECTS) $(TESTCASES)
+check: external_data $(OBJECTS) $(TESTCASES)
 	@cd .. ; for testcase in $(TESTCASES); do echo "Executing $$testcase..."; $(TEST_PREFIX)test/$$testcase $(TEST_PATTERN) || exit 1; done