CMake/Tests/CTestLimitDashJ/CreateSleepDelete.cmake
David Cole e378ba5f39 Add CTestLimitDashJ test (#12904)
Add a test that verifies that when ctest -j 4 is called, at most, 4 tests
are executed at any one time.

The test works by running the same script as each of 100 tests. And then setting
up test properties for DEPENDS, RUN_SERIAL, PROCESSORS and COST in order to get
the tests to run in a semi-deterministic ordering, even in parallel. The script
writes a file, sleeps for a bit, and then deletes the file. In the meantime, it
counts files that currently exist, and emits output that triggers a test failure
if the count of files is ever greater than 4.

Prior to the commit that fixed bug #12904, this would result in a failed test
because the output of some of the tests would indicate that more than 4 tests
were running simultaneously.

Now that this issue is resolved, this test will help guarantee that it stays
resolved moving forward.
2013-01-03 13:37:50 -05:00

49 lines
997 B
CMake

set(CTEST_RUN_CURRENT_SCRIPT 0)
if(NOT DEFINED basefilename)
message(FATAL_ERROR "pass -Dbasefilename=f1")
endif()
if(NOT DEFINED ext)
set(ext "jkqvxz")
endif()
if(NOT DEFINED sleep_interval)
set(sleep_interval 1)
endif()
get_filename_component(self_dir "${CMAKE_CURRENT_LIST_FILE}" PATH)
set(filename "${self_dir}/${basefilename}.${ext}")
# count files
file(GLOB f1 *.${ext})
list(LENGTH f1 c1)
message("c='${c1}'")
# write a new file
message("Writing file: filename='${filename}'")
file(WRITE "${filename}" "${filename}")
# count files again
file(GLOB f2 *.${ext})
list(LENGTH f2 c2)
message("c='${c2}'")
# snooze
message("Sleeping: sleep_interval='${sleep_interval}'")
ctest_sleep(${sleep_interval})
# count files again
file(GLOB f3 *.${ext})
list(LENGTH f3 c3)
message("c='${c3}'")
# delete the file we wrote earlier
message("Removing file: filename='${filename}'")
file(REMOVE "${filename}")
# count files again
file(GLOB f4 *.${ext})
list(LENGTH f4 c4)
message("c='${c4}'")