Skip building tests by default (#993)

CXX-1792
CXX-2702

Tests will not be compiled by default.
To enable building tests, build with -DBUILD_TESTING=ON

---------

Co-authored-by: vector-of-bool <[email protected]>

Author: kkloberdanz

.evergreen/compile.sh

@@ -50,7 +50,7 @@ case "$OS" in
 esac
 
 cd build
-"${cmake_binary}" -G "$GENERATOR" "-DCMAKE_BUILD_TYPE=${BUILD_TYPE}" -DMONGOCXX_ENABLE_SLOW_TESTS=ON -DENABLE_UNINSTALL=ON "$@" ..
+"${cmake_binary}" -G "$GENERATOR" "-DCMAKE_BUILD_TYPE=${BUILD_TYPE}" -DBUILD_TESTING=ON -DMONGOCXX_ENABLE_SLOW_TESTS=ON -DENABLE_UNINSTALL=ON "$@" ..
 "${cmake_binary}" --build . --config $BUILD_TYPE -- $CMAKE_BUILD_OPTS
 "${cmake_binary}" --build . --config $BUILD_TYPE --target install -- $CMAKE_BUILD_OPTS
 "${cmake_binary}" --build . --config $BUILD_TYPE --target $CMAKE_EXAMPLES_TARGET -- $CMAKE_BUILD_OPTS

CMakeLists.txt

@@ -20,6 +20,10 @@ endif()
 
 project(MONGO_CXX_DRIVER LANGUAGES CXX)
 
+if(NOT DEFINED BUILD_TESTING)
+  set(BUILD_TESTING OFF)  # Set this to OFF by default
+endif()
+
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
   if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.8.2")
     message(FATAL_ERROR "Insufficient GCC version - GCC 4.8.2+ required")
@@ -102,8 +106,8 @@ if(NEED_DOWNLOAD_C_DRIVER)
         add_subdirectory(${mongo-c-driver_SOURCE_DIR} ${mongo-c-driver_BINARY_DIR})
         set(CMAKE_CXX_FLAGS ${OLD_CMAKE_CXX_FLAGS})
         set(CMAKE_C_FLAGS ${OLD_CMAKE_C_FLAGS})
-        set(ENABLE_TESTS OLD_ENABLE_TESTS)
-        set(BUILD_TESTING OLD_BUILD_TESTING)
+        set(ENABLE_TESTS ${OLD_ENABLE_TESTS})
+        set(BUILD_TESTING ${OLD_BUILD_TESTING})
     endif()
     message(STATUS "Download and configure C driver version ${LIBMONGOC_DOWNLOAD_VERSION} ... end")
 endif()

src/bsoncxx/test/CMakeLists.txt

@@ -12,6 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+if(NOT BUILD_TESTING)
+  set_property(DIRECTORY PROPERTY EXCLUDE_FROM_ALL TRUE)
+endif()
+
 include_directories(
     ${MONGO_CXX_DRIVER_SOURCE_DIR}/src/third_party/catch/include
 )

src/mongocxx/test/CMakeLists.txt

@@ -12,6 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+if(NOT BUILD_TESTING)
+  set_property(DIRECTORY PROPERTY EXCLUDE_FROM_ALL TRUE)
+endif()
+
 include_directories(
     ${THIRD_PARTY_SOURCE_DIR}/catch/include
 )