cmTestGenerator: Evaluate generator expressions in test properties

This is useful for cases like:

  add_test(NAME mytest COMMAND mydriver $<TARGET_FILE:myexe>)
  set_tests_properties(mytest PROPERTIES
    REQUIRED_FILES "$<TARGET_FILE:myexe>"
    WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIGURATION>"
    )

In this example we require the actual test executable to exist to
run the test in addition to the test driver at argv[0].  Also the
$<CONFIGURATION> expression improves over \${CTEST_CONFIGURATION_TYPE}
because the latter is not normalized for case-sensitive filesystems.

1 files changed, 8 insertions, 0 deletions

diff --git a/Tests/GeneratorExpression/echo.c b/Tests/GeneratorExpression/echo.c
new file mode 100644
index 0000000..06b0844
--- /dev/null
+++ b/Tests/GeneratorExpression/echo.c
@@ -0,0 +1,8 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char* argv[])
+{
+  printf("%s\n", argv[1]);
+  return EXIT_SUCCESS;
+}