add initial test support

CMakeLists.txt

@@ -8,7 +8,8 @@ project(mapnik
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
-set(BUILD_SHARED_LIBS ON)
+option(BUILD_SHARED_LIBS "build mapnik dynamic" ON)
+option(BUILD_TEST "builds the tests" ON)
 option(USE_EXTERNAL_MAPBOX_GEOMETRY "Use a external mapnik/geometry.hpp. If off, use the submodule" OFF)
 option(USE_EXTERNAL_MAPBOX_POLYLABEL "Use a external mapnik/polylabel. If off, use the submodule" OFF)
 option(USE_EXTERNAL_MAPBOX_PROTOZERO "Use a external mapnik/protozero. If off, use the submodule" OFF)
@@ -202,6 +203,10 @@ add_subdirectory(src)
 add_subdirectory(plugins)
 add_subdirectory(utils)
 add_subdirectory(demo)
+if(BUILD_TEST)
+    enable_testing()
+    add_subdirectory(test)
+endif()
 
 
 include(CMakePackageConfigHelpers)

test/CMakeLists.txt

@@ -0,0 +1,31 @@
+project(mapnik-test)
+
+Include(FetchContent)
+
+FetchContent_Declare(
+  Catch2
+  GIT_REPOSITORY https://github.com/catchorg/Catch2.git
+  GIT_TAG        v2.13.1)
+FetchContent_MakeAvailable(Catch2)
+
+# Prepare "Catch" library for other executables
+set(CATCH_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+add_library(Catch INTERFACE)
+target_include_directories(Catch INTERFACE ${CATCH_INCLUDE_DIR})
+
+add_executable(mapnik-test-unit 
+    unit/run.cpp
+    unit/color/css_color.cpp
+)
+target_link_libraries(mapnik-test-unit PUBLIC
+    Catch 
+    mapnik::headers
+    mapnik::agg
+    mapnik::mapnik
+)
+
+include(CTest)
+include(${catch2_SOURCE_DIR}/contrib/Catch.cmake)
+include(${catch2_SOURCE_DIR}/contrib/ParseAndAddCatchTests.cmake)
+
+ParseAndAddCatchTests(mapnik-test-unit)