Portability Pytest 8. Added two tests to check complex assertions

closes #12

pytest_parallel/plugin.py

@@ -1,13 +1,15 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
+import os
 import sys
 import subprocess
 import tempfile
-import pytest
 from pathlib import Path
 import argparse
 import resource
+import pytest
+from _pytest.terminal import TerminalReporter
 
 # --------------------------------------------------------------------------
 def pytest_addoption(parser):
@@ -164,9 +166,16 @@ def pytest_configure(config):
 
     # only report to terminal if master process
     if not enable_terminal_reporter:
+        # unregister the stdout terminal reporter
         terminal_reporter = config.pluginmanager.getplugin('terminalreporter')
         config.pluginmanager.unregister(terminal_reporter)
 
+        # Pytest relies on having a terminal reporter to decide on how to create error messages, see #12
+        # Hence, register a terminal reporter that outputs to /dev/null
+        null_file = open(os.devnull,'w')
+        terminal_reporter = TerminalReporter(config, null_file)
+        config.pluginmanager.register(terminal_reporter, "terminalreporter")
+
 
 # --------------------------------------------------------------------------
 @pytest.fixture

test/pytest_parallel_refs/terminal_fail_complex_assert_two_procs

@@ -0,0 +1,54 @@
+[=]+ test session starts [=]+
+platform [^\n]*
+cachedir: [^\n]*
+?(?:metadata: [^\n]*)?
+rootdir: [^\n]*
+?(?:configfile: [^\n]*)?
+?(?:plugins: [^\n]*)?
+collecting ... [\s]*collected 1 item[\s]*
+?(?:Submitting tests to SLURM...)?
+?(?:SLURM job [^\n]* has been submitted)?
+
+[^\n]*test_fail_complex_assert_two_procs.py::test_fail_with_complex_assert_reporting\[2\] FAILED
+
+[=]+ FAILURES [=]+
+[_]+ test_fail_with_complex_assert_reporting\[2\] [_]+
+
+[-]+ On rank 0 of 2 [-]+
+comm = <mpi4py.MPI.Intracomm object at [^\n]*>
+
+    @pytest_parallel.mark.parallel\(2\)
+    def test_fail_with_complex_assert_reporting\(comm\):
+        if comm.Get_rank\(\) == 0:
+>           assert 1 == 0
+E           assert 1 == 0
+
+[^\n]*test_fail_complex_assert_two_procs.py:7: AssertionError
+
+[-]+ On rank 1 of 2 [-]+
+comm = <mpi4py.MPI.Intracomm object at [^\n]*>
+
+    @pytest_parallel.mark.parallel\(2\)
+    def test_fail_with_complex_assert_reporting\(comm\):
+        if comm.Get_rank\(\) == 0:
+            assert 1 == 0
+        if comm.Get_rank\(\) == 1:
+>           assert \[0,1,2\] == \[0,1,3\]
+E           assert \[0, 1, 2\] == \[0, 1, 3\]
+E             
+E             At index 2 diff: 2 != 3
+E             
+E             Full diff:
+E               \[
+E                   0,
+E                   1,
+E             -     3,
+E             \?     \^
+E             \+     2,
+E             \?     \^
+E               \]
+
+[^\n]*test_fail_complex_assert_two_procs.py:9: AssertionError
+[=]+ short test summary info [=]+
+FAILED [^\n]*test_fail_complex_assert_two_procs.py::test_fail_with_complex_assert_reporting\[2\][^\n]*
+[=]+ 1 failed in [^\n]*s [=]+

test/pytest_parallel_tests/test_fail_complex_assert_two_procs.py

@@ -0,0 +1,9 @@
+import pytest_parallel
+
+
+@pytest_parallel.mark.parallel(2)
+def test_fail_with_complex_assert_reporting(comm):
+    if comm.Get_rank() == 0:
+        assert 1 == 0
+    if comm.Get_rank() == 1:
+        assert [0,1,2] == [0,1,3]