conditionally find unit test framework and link it to tests

Author: lia-viam

CMakeLists.txt

@@ -324,7 +324,11 @@ set(VIAMCPPSDK_XTL_VERSION_MINIMUM 0.7.2)
 set(VIAMCPPSDK_XTENSOR_VERSION_MINIMUM 0.24.3)
 
 # Time to find `BOOST`.
-find_package(Boost ${VIAMCPPSDK_BOOST_VERSION_MINIMUM} REQUIRED COMPONENTS headers log program_options)
+if (VIAMCPPSDK_BUILD_TESTS)
+  set(VIAMCPPSDK_BOOST_TEST "unit_test_framework")
+endif()
+
+find_package(Boost ${VIAMCPPSDK_BOOST_VERSION_MINIMUM} REQUIRED COMPONENTS headers log program_options ${VIAMCPPSDK_BOOST_TEST})
 
 # Time to find `protobuf` and `gRPC[++]`. Normally this would just be
 # something like `find_package(gRPC <version> CONFIG REQUIRED)`, and

src/viam/sdk/tests/CMakeLists.txt

@@ -47,6 +47,7 @@ target_include_directories(viamsdk_test
 
 target_link_libraries(viamsdk_test
   PUBLIC viam-cpp-sdk::viamsdk
+  PUBLIC Boost::unit_test_framework
 )
 
 viamcppsdk_link_viam_api(viamsdk_test PUBLIC)