#!/usr/bin/env python
"""
Custom test runner

If args or options, we run the testsuite as quickly as possible.

If args but no options, we default to using the spec plugin and aborting on
first error/failure.

If options, we ignore defaults and pass options onto Nose.

Examples:

Run all tests (as fast as possible)
$ ./runtests.py

Run all unit tests (using spec output)
$ ./runtests.py tests/unit

Run all checkout unit tests (using spec output)
$ ./runtests.py tests/unit/checkout

Run all tests relating to shipping
$ ./runtests.py --attr=shipping

Re-run failing tests (needs to be run twice to first build the index)
$ ./runtests.py ... --failed

Drop into pdb when a test fails
$ ./runtests.py ... --pdb-failures
"""

import sys
import logging
import warnings

from tests.config import configure
from django.utils.six.moves import map

# No logging
logging.disable(logging.CRITICAL)


def run_tests(verbosity, *test_args):
    from django_nose import NoseTestSuiteRunner
    test_runner = NoseTestSuiteRunner(verbosity=verbosity)
    if not test_args:
        test_args = ['tests']
    num_failures = test_runner.run_tests(test_args)
    if num_failures:
        sys.exit(num_failures)


if __name__ == '__main__':
    args = sys.argv[1:]

    verbosity = 1
    if not args:
        # If run with no args, try and run the testsuite as fast as possible.
        # That means across all cores and with no high-falutin' plugins.
        import multiprocessing
        try:
            num_cores = multiprocessing.cpu_count()
        except NotImplementedError:
            num_cores = 4  # Guess
        args = ['--nocapture', '--stop', '--processes=%s' % num_cores]
    else:
        # Some args/options specified.  Check to see if any nose options have
        # been specified.  If they have, then don't set any
        has_options = any(map(lambda x: x.startswith('--'), args))
        if not has_options:
            # Default options:
            # --stop Abort on first error/failure
            # --nocapture Don't capture STDOUT
            args.extend(['--nocapture', '--stop'])
        else:
            # Remove options as nose will pick these up from sys.argv
            for arg in args:
                if arg.startswith('--verbosity'):
                    verbosity = int(arg[-1])
            args = [arg for arg in args if not arg.startswith('-')]

    configure()
    with warnings.catch_warnings():
        # The warnings module in default configuration will never cause tests
        # to fail, as it never raises an exception.  We alter that behaviour by
        # turning DeprecationWarnings into exceptions, but exclude warnings
        # triggered by third-party libs. Note: The context manager is not thread
        # safe. Behaviour with multiple threads is undefined.
        warnings.filterwarnings('error', category=DeprecationWarning)
        warnings.filterwarnings('error', category=RuntimeWarning)
        libs = r'(sorl\.thumbnail.*|bs4.*|webtest.*)'
        warnings.filterwarnings(
            'ignore', r'.*', DeprecationWarning, libs)
        run_tests(verbosity, *args)