#!/usr/bin/env python3
'''
Filters failing scenarios from a tck test run and prints them to stdout.
'''

from argparse import ArgumentParser
import sys

def main():
    argp = ArgumentParser(description=__doc__)
    argp.add_argument('test_log', metavar='TEST_LOG', type=str,
                      help='Path to the log of a tck test run')
    args = argp.parse_args()
    with open(args.test_log) as f:
        scenario_failed = False
        scenario_lines = []
        for line in f:
            if line.strip().startswith('Scenario:'):
                if scenario_failed:
                    print(''.join(scenario_lines))
                scenario_failed = False
                scenario_lines.clear()
            if line.strip().startswith('AssertionError'):
                scenario_failed = True
            scenario_lines.append(line)

if __name__ == '__main__':
    main()