Only build tests if testing is enabled

This commit ensures that tests are only compiled by default if
BUILD_TESTING is enabled when generating the CMake configuration. There
should be no change in behavior, as BUILD_TESTING defaults to ON.

CMakeLists.txt

@@ -6,6 +6,7 @@
 cmake_minimum_required(VERSION 3.0.2)
 project("sparta")
 
+include(CTest)
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules" ${CMAKE_MODULE_PATH})
 include(Commons)
 
@@ -54,20 +55,6 @@ export(TARGETS sparta FILE sparta_target.cmake)
 ###################################################
 # test
 ###################################################
-file(GLOB test
-        "test/*.cpp"
-        )
-
-include(CTest)
-# ${test} contains all paths to the test cpps
-foreach(testfile ${test})
-    # ${testfile} is in the format of test/SomeTest.cpp
-    string(REPLACE ".cpp" "_test" no_ext_name ${testfile})
-    # ${no_ext_name} is in the format of test/SomeTest_test
-    get_filename_component(test_bin ${no_ext_name} NAME)
-    # ${test_bin} is in the format of SomeTest_test
-    add_executable(${test_bin} ${testfile})
-    target_link_libraries(${test_bin} PRIVATE sparta gmock_main)
-    add_test(NAME ${testfile} COMMAND ${test_bin})
-endforeach()
-
+if (BUILD_TESTING)
+    add_subdirectory(test)
+endif()

test/CMakeLists.txt

@@ -0,0 +1,14 @@
+file(GLOB test
+        "*.cpp"
+        )
+
+foreach(testfile ${test})
+    # ${testfile} is in the format of test/SomeTest.cpp
+    string(REPLACE ".cpp" "_test" no_ext_name ${testfile})
+    # ${no_ext_name} is in the format of test/SomeTest_test
+    get_filename_component(test_bin ${no_ext_name} NAME)
+    # ${test_bin} is in the format of SomeTest_test
+    add_executable(${test_bin} ${testfile})
+    target_link_libraries(${test_bin} PRIVATE sparta gmock_main)
+    add_test(NAME ${testfile} COMMAND ${test_bin})
+endforeach()