[CMake] Calling a Python Testing Script from CMake/CTest

[George Ryan]

Thanks, Matthew. That worked.

I had tried something similar using find(PythonInterp REQUIRED), but that didn't work. The include() worked perfectly!

Thanks!
George


On 02/24/2016 10:51 AM, Matthew Keeler wrote:
My guess is that the command prompt is seeing the .py extension and automatically invoking the python interpreter for you. On other platforms it looks for the #!/usr/bin/env python which won’t work on windows.What you should do is use the FindPythonInterp cmake module to find your python executable and specify the interpreter to execute in your add test line. https://cmake.org/cmake/help/v3.3/module/FindPythonInterp.html

Something like the following should work (I have not tested so the syntax might need some slight tweaks).

include(FindPythonInterp)
add_test(NAME sample_test COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/sample_test.py WORKING_DIRECTORY ${EXECUTABLE_OUTPUT_PATH} )

--
Matthew Keeler

On February 24, 2016 at 09:15:10, George Ryan (george.ryan at geospectrum.ca<mailto:george.ryan at geospectrum.ca>) wrote:

Hi,

I am having difficulty getting a python script to run a C++ subprocess
on Window 7 using VS2013. On Linux, the following code works fine, but
on Windows, from the command line I get the following output:

Microsoft (R) Program Maintenance Utility Version 12.00.21005.1
Copyright (C) Microsoft Corporation. All rights reserved.

Running tests...
Test project C:/work/s/sandbox/ctestpy/b
Start 1: sample_test
1/1 Test #1: sample_test ......................***Not Run 0.00 sec

0% tests passed, 1 tests failed out of 1

Total Test time (real) = 0.06 sec

The following tests FAILED:
1 - sample_test (BAD_COMMAND)
Errors while running CTest
NMAKE : fatal error U1077: 'echo' : return code '0x8'
Stop.

No matter what options I supply to ctest, I can't seem to get any
additional insight. I am assuming that for some reason the
WORKING_DIRECTORY isn't being obeyed on Windows?

If I run the python script manually from the command prompt, it works
fine. The python executable is in my $PATH.On Linux I am using CMake
3.3.1, and on Windows I have CMake 3.2.3.

----

sample.cpp

int main()
{
return 0;
}

--------------

sample_test.py

#!/usr/bin/env python
import sys
import subprocess

sample = subprocess.Popen("./sample")
sample.wait()
if sample.returncode != 0:
sys.exit(1)
else:
sys.exit(0)
~
------------------------

CMakeLists.txt

cmake_minimum_required(VERSION 3.0)
project(sampleprg)

enable_testing()

add_executable( sample sample.cpp )

add_test(NAME sample_test
COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/sample_test.py
WORKING_DIRECTORY ${EXECUTABLE_OUTPUT_PATH} )




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--
Senior Software Architect
GeoSpectrum Technologies Inc.
Dartmouth, Nova Scotia, Canada
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