move to cmake

test/CMakeLists.txt

@@ -0,0 +1,20 @@
+enable_testing()
+find_package(GTest REQUIRED)
+
+add_executable(dtl_test 
+  test/Intdifftest.cpp
+  test/Objdifftest.cpp
+  test/Patchtest.cpp
+  test/Strdiff3test.cpp
+  test/Strdifftest.cpp
+  test/dtl_test.cpp
+  test/dtl_test_common.cpp
+)
+
+target_include_directories(dtl_test BEFORE PRIVATE
+  ${CMAKE_CURRENT_SOURCE_DIR}/test
+)
+
+target_link_libraries(dtl_test GTest::gtest GTest::gtest_main)
+
+add_test(AllTests dtl_test)