Fix printing test failures on Python 3

IPython/testing/iptestcontroller.py

@@ -1,381 +1,382 b''
 # -*- coding: utf-8 -*-
 """IPython Test Process Controller
 
 This module runs one or more subprocesses which will actually run the IPython
 test suite.
 
 """
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2009-2011  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 from __future__ import print_function
 
 import argparse
 import multiprocessing.pool
 import os
 import shutil
 import signal
 import sys
 import subprocess
 import time
 
 from .iptest import have, test_group_names, test_sections
+from IPython.utils.py3compat import bytes_to_str
 from IPython.utils.sysinfo import sys_info
 from IPython.utils.tempdir import TemporaryDirectory
 
 
 class TestController(object):
     """Run tests in a subprocess
     """
     #: str, IPython test suite to be executed.
     section = None
     #: list, command line arguments to be executed
     cmd = None
     #: dict, extra environment variables to set for the subprocess
     env = None
     #: list, TemporaryDirectory instances to clear up when the process finishes
     dirs = None
     #: subprocess.Popen instance
     process = None
     #: str, process stdout+stderr
     stdout = None
     #: bool, whether to capture process stdout & stderr
     buffer_output = False
 
     def __init__(self):
         self.cmd = []
         self.env = {}
         self.dirs = []
     
     @property
     def will_run(self):
         """Override in subclasses to check for dependencies."""
         return False
 
     def launch(self):
         # print('*** ENV:', self.env)  # dbg
         # print('*** CMD:', self.cmd)  # dbg
         env = os.environ.copy()
         env.update(self.env)
         output = subprocess.PIPE if self.buffer_output else None
         stdout = subprocess.STDOUT if self.buffer_output else None
         self.process = subprocess.Popen(self.cmd, stdout=output,
                 stderr=stdout, env=env)
 
     def wait(self):
         self.stdout, _ = self.process.communicate()
         return self.process.returncode
 
     def cleanup_process(self):
         """Cleanup on exit by killing any leftover processes."""
         subp = self.process
         if subp is None or (subp.poll() is not None):
             return  # Process doesn't exist, or is already dead.
 
         try:
             print('Cleaning up stale PID: %d' % subp.pid)
             subp.kill()
         except: # (OSError, WindowsError) ?
             # This is just a best effort, if we fail or the process was
             # really gone, ignore it.
             pass
         else:
             for i in range(10):
                 if subp.poll() is None:
                     time.sleep(0.1)
                 else:
                     break
 
         if subp.poll() is None:
             # The process did not die...
             print('... failed. Manual cleanup may be required.')
     
     def cleanup(self):
         "Kill process if it's still alive, and clean up temporary directories"
         self.cleanup_process()
         for td in self.dirs:
             td.cleanup()
     
     __del__ = cleanup
 
 class PyTestController(TestController):
     """Run Python tests using IPython.testing.iptest"""
     #: str, Python command to execute in subprocess
     pycmd = None
 
     def __init__(self, section):
         """Create new test runner."""
         TestController.__init__(self)
         self.section = section
         # pycmd is put into cmd[2] in PyTestController.launch()
         self.cmd = [sys.executable, '-c', None, section]
         self.pycmd = "from IPython.testing.iptest import run_iptest; run_iptest()"
         ipydir = TemporaryDirectory()
         self.dirs.append(ipydir)
         self.env['IPYTHONDIR'] = ipydir.name
         self.workingdir = workingdir = TemporaryDirectory()
         self.dirs.append(workingdir)
         self.env['IPTEST_WORKING_DIR'] = workingdir.name
         # This means we won't get odd effects from our own matplotlib config
         self.env['MPLCONFIGDIR'] = workingdir.name
 
     @property
     def will_run(self):
         return test_sections[self.section].will_run
 
     def add_xunit(self):
         xunit_file = os.path.abspath(self.section + '.xunit.xml')
         self.cmd.extend(['--with-xunit', '--xunit-file', xunit_file])
 
     def add_coverage(self):
         coverage_rc = ("[run]\n"
                        "data_file = {data_file}\n"
                        "source =\n"
                        "  {source}\n"
                       ).format(data_file=os.path.abspath('.coverage.'+self.section),
                                source="\n  ".join(test_sections[self.section].includes))
 
         config_file = os.path.join(self.workingdir.name, '.coveragerc')
         with open(config_file, 'w') as f:
             f.write(coverage_rc)
 
         self.env['COVERAGE_PROCESS_START'] = config_file
         self.pycmd = "import coverage; coverage.process_startup(); " + self.pycmd
 
     def launch(self):
         self.cmd[2] = self.pycmd
         super(PyTestController, self).launch()
 
 
 def prepare_py_test_controllers(inc_slow=False, xunit=False, coverage=False):
     """Returns an ordered list of PyTestController instances to be run."""
     to_run, not_run = [], []
     if not inc_slow:
         test_sections['parallel'].enabled = False
 
     for name in test_group_names:
         controller = PyTestController(name)
         if xunit:
             controller.add_xunit()
         if coverage:
             controller.add_coverage()
         if controller.will_run:
             to_run.append(controller)
         else:
             not_run.append(controller)
     return to_run, not_run
 
 def do_run(controller):
     try:
         try:
             controller.launch()
         except Exception:
             import traceback
             traceback.print_exc()
             return controller, 1  # signal failure
     
         exitcode = controller.wait()
         return controller, exitcode
     
     except KeyboardInterrupt:
         return controller, -signal.SIGINT
     finally:
         controller.cleanup()
 
 def report():
     """Return a string with a summary report of test-related variables."""
 
     out = [ sys_info(), '\n']
 
     avail = []
     not_avail = []
 
     for k, is_avail in have.items():
         if is_avail:
             avail.append(k)
         else:
             not_avail.append(k)
 
     if avail:
         out.append('\nTools and libraries available at test time:\n')
         avail.sort()
         out.append('   ' + ' '.join(avail)+'\n')
 
     if not_avail:
         out.append('\nTools and libraries NOT available at test time:\n')
         not_avail.sort()
         out.append('   ' + ' '.join(not_avail)+'\n')
 
     return ''.join(out)
 
 def run_iptestall(inc_slow=False, jobs=1, xunit_out=False, coverage_out=False):
     """Run the entire IPython test suite by calling nose and trial.
 
     This function constructs :class:`IPTester` instances for all IPython
     modules and package and then runs each of them.  This causes the modules
     and packages of IPython to be tested each in their own subprocess using
     nose.
     
     Parameters
     ----------
     
     inc_slow : bool, optional
       Include slow tests, like IPython.parallel. By default, these tests aren't
       run.
 
     fast : bool, option
       Run the test suite in parallel, if True, using as many threads as there
       are processors
     """
     if jobs != 1:
         TestController.buffer_output = True
 
     to_run, not_run = prepare_py_test_controllers(inc_slow=inc_slow, xunit=xunit_out,
                                           coverage=coverage_out)
 
     def justify(ltext, rtext, width=70, fill='-'):
         ltext += ' '
         rtext = (' ' + rtext).rjust(width - len(ltext), fill)
         return ltext + rtext
 
     # Run all test runners, tracking execution time
     failed = []
     t_start = time.time()
 
     print('*'*70)
     if jobs == 1:
         for controller in to_run:
             print('IPython test group:', controller.section)
             controller, res = do_run(controller)
             if res:
                 failed.append(controller)
                 if res == -signal.SIGINT:
                     print("Interrupted")
                     break
             print()
 
     else:
         try:
             pool = multiprocessing.pool.ThreadPool(jobs)
             for (controller, res) in pool.imap_unordered(do_run, to_run):
                 res_string = 'OK' if res == 0 else 'FAILED'
                 print(justify('IPython test group: ' + controller.section, res_string))
                 if res:
-                    print(controller.stdout)
+                    print(bytes_to_str(controller.stdout))
                     failed.append(controller)
                     if res == -signal.SIGINT:
                         print("Interrupted")
                         break
         except KeyboardInterrupt:
             return
     
     for controller in not_run:
         print(justify('IPython test group: ' + controller.section, 'NOT RUN'))
 
     t_end = time.time()
     t_tests = t_end - t_start
     nrunners = len(to_run)
     nfail = len(failed)
     # summarize results
     print('*'*70)
     print('Test suite completed for system with the following information:')
     print(report())
     print('Ran %s test groups in %.3fs' % (nrunners, t_tests))
     print()
     print('Status:')
     if not failed:
         print('OK')
     else:
         # If anything went wrong, point out what command to rerun manually to
         # see the actual errors and individual summary
         print('ERROR - %s out of %s test groups failed.' % (nfail, nrunners))
         for controller in failed:
             print('-'*40)
             print('Runner failed:', controller.section)
             print('You may wish to rerun this one individually, with:')
             print('  iptest', *controller.cmd[3:])
             print()
 
     if coverage_out:
         from coverage import coverage
         cov = coverage(data_file='.coverage')
         cov.combine()
         cov.save()
 
         # Coverage HTML report
         if coverage_out == 'html':
             html_dir = 'ipy_htmlcov'
             shutil.rmtree(html_dir, ignore_errors=True)
             print("Writing HTML coverage report to %s/ ... " % html_dir, end="")
             sys.stdout.flush()
 
             # Custom HTML reporter to clean up module names.
             from coverage.html import HtmlReporter
             class CustomHtmlReporter(HtmlReporter):
                 def find_code_units(self, morfs):
                     super(CustomHtmlReporter, self).find_code_units(morfs)
                     for cu in self.code_units:
                         nameparts = cu.name.split(os.sep)
                         if 'IPython' not in nameparts:
                             continue
                         ix = nameparts.index('IPython')
                         cu.name = '.'.join(nameparts[ix:])
 
             # Reimplement the html_report method with our custom reporter
             cov._harvest_data()
             cov.config.from_args(omit='*%stests' % os.sep, html_dir=html_dir,
                                  html_title='IPython test coverage',
                                 )
             reporter = CustomHtmlReporter(cov, cov.config)
             reporter.report(None)
             print('done.')
 
         # Coverage XML report
         elif coverage_out == 'xml':
             cov.xml_report(outfile='ipy_coverage.xml')
 
     if failed:
         # Ensure that our exit code indicates failure
         sys.exit(1)
 
 
 def main():
     if len(sys.argv) > 1 and (sys.argv[1] in test_sections):
         from .iptest import run_iptest
         # This is in-process
         run_iptest()
         return
             
     parser = argparse.ArgumentParser(description='Run IPython test suite')
     parser.add_argument('--all', action='store_true',
                         help='Include slow tests not run by default.')
     parser.add_argument('-j', '--fast', nargs='?', const=None, default=1,
                         help='Run test sections in parallel.')
     parser.add_argument('--xunit', action='store_true',
                         help='Produce Xunit XML results')
     parser.add_argument('--coverage', nargs='?', const=True, default=False,
                         help="Measure test coverage. Specify 'html' or "
                         "'xml' to get reports.")
 
     options = parser.parse_args()
 
     try:
         jobs = int(options.fast)
     except TypeError:
         jobs = options.fast
 
     # This starts subprocesses
     run_iptestall(inc_slow=options.all, jobs=jobs,
                   xunit_out=options.xunit, coverage_out=options.coverage)
 
 
 if __name__ == '__main__':
     main()