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

[Hendrik Sattler]

Am 24. Februar 2016 15:09:47 MEZ, schrieb George Ryan <George.Ryan at geospectrum.ca>:
>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} )

You have to manuall call python with the script as argument. Shebang lines don't work on Windows.

HS