CMake: Fix running tests on Windows

For the API tests, output the test programs at $(TOP_BUILDDIR) so that
the freshly-built DLLs will be available for the test programs.  For
those that are run through the Python wrapper scripts, use
${PYTHON_EXECUTABLE} instead of plain 'python' in case the Python
interpreter is not in the PATH.

test/api/CMakeLists.txt

@@ -21,7 +21,12 @@ if (HB_HAVE_GLIB)
       message (FATAL_ERROR "No source file found for test ${test_name}")
     endif ()
     target_link_libraries (${test_name} harfbuzz harfbuzz-subset)
-    add_test (${test_name} ${test_name})
+    if (WIN32)
+      set_property (TARGET ${test_name} PROPERTY RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+      add_test (NAME ${test_name} COMMAND ${test_name})
+    else (WIN32)
+      add_test (${test_name} ${test_name})
+    endif (WIN32)
   endforeach ()
   set_tests_properties (${TEST_PROGS} PROPERTIES ENVIRONMENT
     "G_TEST_SRCDIR=${CMAKE_CURRENT_SOURCE_DIR};G_TEST_BUILDDIR=${CMAKE_CURRENT_BINARY_DIR}"

test/fuzzing/CMakeLists.txt

@@ -13,6 +13,6 @@ if (HB_CHECK)
 
   target_compile_definitions(hb-fuzzer PUBLIC ${FUZZING_CPPFLAGS})
   add_test (NAME hb-fuzzer
-    COMMAND python run-fuzzer-tests.py $<TARGET_FILE:hb-fuzzer>
+    COMMAND "${PYTHON_EXECUTABLE}" run-fuzzer-tests.py $<TARGET_FILE:hb-fuzzer>
     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
 endif ()

test/shaping/CMakeLists.txt

@@ -3,7 +3,7 @@ if (HB_BUILD_UTILS)
   extract_make_variable (TESTS ${INHOUSE})
   foreach (test IN ITEMS ${TESTS})
     add_test (NAME ${test}
-      COMMAND python run-tests.py $<TARGET_FILE:hb-shape> "data/in-house/${test}"
+      COMMAND "${PYTHON_EXECUTABLE}" run-tests.py $<TARGET_FILE:hb-shape> "data/in-house/${test}"
       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
   endforeach ()
 
@@ -11,7 +11,7 @@ if (HB_BUILD_UTILS)
   extract_make_variable (TESTS ${TEXTRENDERING})
   foreach (test IN ITEMS ${TESTS})
     add_test (NAME ${test}
-      COMMAND python run-tests.py $<TARGET_FILE:hb-shape> "data/text-rendering-tests/${test}"
+      COMMAND "${PYTHON_EXECUTABLE}" run-tests.py $<TARGET_FILE:hb-shape> "data/text-rendering-tests/${test}"
       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
   endforeach ()
 endif ()

test/subset/CMakeLists.txt

@@ -3,7 +3,7 @@ if (HB_BUILD_UTILS)
   extract_make_variable (TESTS ${SOURCES})
   foreach (test IN ITEMS ${TESTS})
     add_test (NAME ${test}
-      COMMAND python run-tests.py $<TARGET_FILE:hb-subset> "data/${test}"
+      COMMAND "${PYTHON_EXECUTABLE}" run-tests.py $<TARGET_FILE:hb-subset> "data/${test}"
       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
     set_property(TEST ${test} PROPERTY SKIP_RETURN_CODE 77)
   endforeach ()