Let ctest (re)build a test before running it.

CMakeLists.txt

 # Copyright (C) 2020 ASTRON (Netherlands Institute for Radio Astronomy)
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.7)
 project(idg)
 
 option(WRITE_OUT_SCALAR_BEAM "Write scalar beam to scalar_beam.npy" OFF)
@@ -76,6 +76,29 @@ endif()
 
 if (BUILD_TESTING)
   find_package(Boost COMPONENTS unit_test_framework REQUIRED)
+
+  # Add a test and let ctest automatically (re)build the test if needed.
+  function(add_built_test TEST_NAME)
+    cmake_parse_arguments(ARG "" "LABEL" "" ${ARGN})
+
+    add_test(NAME build-${TEST_NAME}
+      COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target ${TEST_NAME}
+    )
+    set_tests_properties(build-${TEST_NAME} PROPERTIES FIXTURES_SETUP ${TEST_NAME})
+
+    add_test(NAME ${TEST_NAME} COMMAND ${TEST_NAME})
+    set_tests_properties(${TEST_NAME} PROPERTIES FIXTURES_REQUIRED ${TEST_NAME})
+    if (ARG_LABEL)
+      set_tests_properties(${TEST_NAME} PROPERTIES LABELS ${ARG_LABEL})
+    endif()
+    set_property(
+      TEST ${TEST_NAME}
+      APPEND PROPERTY ENVIRONMENT
+        IDG_DATA_DIR=${CMAKE_SOURCE_DIR}/idg-util/data
+        IDG_INC_DIR=${CMAKE_BINARY_DIR}/include
+        IDG_LIB_DIR=${CMAKE_BINARY_DIR}/lib
+    )
+  endfunction()
 endif()
 
 add_subdirectory("idg-util")

idg-api/tests/CMakeLists.txt

@@ -49,9 +49,4 @@ install(TARGETS ${PROJECT_NAME}
     ARCHIVE DESTINATION lib/static
 )
 
-add_test(NAME ${PROJECT_NAME} COMMAND ${PROJECT_NAME})
-  set_property(
-    TEST ${PROJECT_NAME}
-    APPEND PROPERTY ENVIRONMENT
-        IDG_INC_DIR=${CMAKE_BINARY_DIR}/include
-        IDG_LIB_DIR=${CMAKE_BINARY_DIR}/lib)
+add_built_test(${PROJECT_NAME} LABEL unit)

idg-bin/tests/cxx/CMakeLists.txt

@@ -28,15 +28,7 @@ function(idg_bin_cxx_test)
     ARCHIVE DESTINATION lib/static
   )
 
-  add_test(NAME ${PROJECT_NAME} COMMAND ${PROJECT_NAME})
-
-  set_property(
-    TEST ${PROJECT_NAME}
-    APPEND PROPERTY ENVIRONMENT
-        IDG_DATA_DIR=${CMAKE_SOURCE_DIR}/idg-util/data
-        IDG_INC_DIR=${CMAKE_BINARY_DIR}/include
-        IDG_LIB_DIR=${CMAKE_BINARY_DIR}/lib)
-
+  add_built_test(${PROJECT_NAME} LABEL bin_cxx)
 endfunction()
 
 if (BUILD_LIB_CPU)

idg-lib/tests/CMakeLists.txt

@@ -37,14 +37,10 @@ target_link_libraries (
     ${${PROJECT_NAME}_link_libraries}
 )
 
-# install
 install(TARGETS ${PROJECT_NAME}
     RUNTIME DESTINATION bin/tests/cxx
     LIBRARY DESTINATION lib
     ARCHIVE DESTINATION lib/static
 )
 
-# test
-add_test(
-    NAME ${PROJECT_NAME}
-    COMMAND ${PROJECT_NAME})
+add_built_test(${PROJECT_NAME} LABEL unit)