# -*- coding: utf-8 -*-
"""
    Pygments unit tests
    ~~~~~~~~~~~~~~~~~~

    Usage::

        python run.py [testfile ...]


    :copyright: Copyright 2006-2012 by the Pygments team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import sys, os
import unittest

from os.path import dirname, basename, join, abspath

import pygments

try:
    import coverage
except ImportError:
    coverage = None

testdir = abspath(dirname(__file__))

failed = []
total_test_count = 0
error_test_count = 0


def err(file, what, exc):
    print >>sys.stderr, file, 'failed %s:' % what,
    print >>sys.stderr, exc
    failed.append(file[:-3])


class QuietTestRunner(object):
    """Customized test runner for relatively quiet output"""

    def __init__(self, testname, stream=sys.stderr):
        self.testname = testname
        self.stream = unittest._WritelnDecorator(stream)

    def run(self, test):
        global total_test_count
        global error_test_count
        result = unittest._TextTestResult(self.stream, True, 1)
        test(result)
        if not result.wasSuccessful():
            self.stream.write(' FAIL:')
            result.printErrors()
            failed.append(self.testname)
        else:
            self.stream.write(' ok\n')
        total_test_count += result.testsRun
        error_test_count += len(result.errors) + len(result.failures)
        return result


def run_tests(with_coverage=False):
    # needed to avoid confusion involving atexit handlers
    import logging

    if sys.argv[1:]:
        # test only files given on cmdline
        files = [entry + '.py' for entry in sys.argv[1:] if entry.startswith('test_')]
    else:
        files = [entry for entry in os.listdir(testdir)
                 if (entry.startswith('test_') and entry.endswith('.py'))]
        files.sort()

    WIDTH = 85

    print >>sys.stderr, \
        ('Pygments %s Test Suite running%s, stand by...' %
         (pygments.__version__,
          with_coverage and " with coverage analysis" or "")).center(WIDTH)
    print >>sys.stderr, ('(using Python %s)' % sys.version.split()[0]).center(WIDTH)
    print >>sys.stderr, '='*WIDTH

    if with_coverage:
        coverage.erase()
        coverage.start()

    for testfile in files:
        globs = {'__file__': join(testdir, testfile)}
        try:
            execfile(join(testdir, testfile), globs)
        except Exception, exc:
            raise
            err(testfile, 'execfile', exc)
            continue
        sys.stderr.write(testfile[:-3] + ': ')
        try:
            runner = QuietTestRunner(testfile[:-3])
            # make a test suite of all TestCases in the file
            tests = []
            for name, thing in globs.iteritems():
                if name.endswith('Test'):
                    tests.append((name, unittest.makeSuite(thing)))
            tests.sort()
            suite = unittest.TestSuite()
            suite.addTests([x[1] for x in tests])
            runner.run(suite)
        except Exception, exc:
            err(testfile, 'running test', exc)

    print >>sys.stderr, '='*WIDTH
    if failed:
        print >>sys.stderr, '%d of %d tests failed.' % \
              (error_test_count, total_test_count)
        print >>sys.stderr, 'Tests failed in:', ', '.join(failed)
        ret = 1
    else:
        if total_test_count == 1:
            print >>sys.stderr, '1 test happy.'
        else:
            print >>sys.stderr, 'All %d tests happy.' % total_test_count
        ret = 0

    if with_coverage:
        coverage.stop()
        modules = [mod for name, mod in sys.modules.iteritems()
                   if name.startswith('pygments.') and mod]
        coverage.report(modules)

    return ret


if __name__ == '__main__':
    with_coverage = False
    if sys.argv[1:2] == ['-C']:
        with_coverage = bool(coverage)
        del sys.argv[1]
    sys.exit(run_tests(with_coverage))
