cmake: Add USE_fuzztest option

ortools/algorithms/CMakeLists.txt

@@ -36,6 +36,7 @@ target_link_libraries(${NAME} PRIVATE
 if(BUILD_TESTING)
   file(GLOB _TEST_SRCS "*_test.cc")
   list(FILTER _TEST_SRCS EXCLUDE REGEX ".*_stress_test.cc")
+  list(FILTER _TEST_SRCS EXCLUDE REGEX ".*/n_choose_k_test.cc")
   foreach(_FULL_FILE_NAME IN LISTS _TEST_SRCS)
     get_filename_component(_NAME ${_FULL_FILE_NAME} NAME_WE)
     get_filename_component(_FILE_NAME ${_FULL_FILE_NAME} NAME)
@@ -51,4 +52,17 @@ if(BUILD_TESTING)
         GTest::gmock
     )
   endforeach()
+  if(USE_fuzztest)
+    ortools_cxx_test(
+      NAME
+      algorithms_n_choose_k_test
+      SOURCES
+      "./n_choose_k_test.cc"
+      LINK_LIBRARIES
+      benchmark::benchmark
+      fuzztest::fuzztest
+      fuzztest::fuzztest_gtest_main
+      GTest::gmock
+    )
+  endif()
 endif()