import os
import sys
import time
import unittest


class TextTestRunner(unittest.TextTestRunner):
    """This is a wrapper class used to minimize the amount of blank lines
    printed to stdout. The method ``run`` is modified and it's original source
    is in Python Standard Library's ``unittest`` module."""

    def __init__(self, stream=sys.stderr, descriptions=True, verbosity=1,
            color=True):
        unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity)
        self.color = color

    def run(self, test):
        "Run the given test case or test suite."
        result = self._makeResult()
        result.failfast = getattr(self, 'failfast', None)
        result.buffer = getattr(self, 'buffer', None)
        startTime = time.time()
        startTestRun = getattr(result, 'startTestRun', None)

        if startTestRun is not None:
            startTestRun()
        try:
            test(result)
        finally:
            stopTestRun = getattr(result, 'stopTestRun', None)
            if stopTestRun is not None:
                stopTestRun()

        stopTime = time.time()
        timeTaken = stopTime - startTime
        result.printErrors()

        run = result.testsRun
        msg = 'Ran %d test%s in %.3fs '
        self.stream.write(msg % (run, run != 1 and 's' or '', timeTaken))

        expectedFails = unexpectedSuccesses = skipped = 0
        try:
            results = map(len, (result.expectedFailures,
                                result.unexpectedSuccesses,
                                result.skipped))
        except AttributeError:
            pass
        else:
            expectedFails, unexpectedSuccesses, skipped = results

        infos = []

        if not result.wasSuccessful():
            if self.color:
                msg = '\033[0;31mFAILED\033[1;m'
            else:
                msg = 'FAILED'
            self.stream.write(msg)

            failed, errored = map(len, (result.failures, result.errors))
            if failed: 
                if self.color:
                    msg = 'failures=\033[1;31m%d\033[1;m'
                else:
                    msg = 'failures=%d'
                infos.append(msg % failed)
            if errored:
                if self.color:
                    msg = 'errors=\033[1;31m%d\033[1;m'
                else:
                    msg = 'errors=%d'
                infos.append(msg % errored)
        else:
            if self.color:
                msg = '\033[0;32mOK\033[0;m'
            else:
                msg = 'OK'
            self.stream.write(msg)

        if skipped:
            if self.color:
                msg = 'skipped=\033[1;33m%d\033[1;m'
            else:
                msg = 'skipped=%d'
            infos.append(msg % skipped)

        if expectedFails:
            infos.append('expected failures=%d' % expectedFails)

        if unexpectedSuccesses:
            infos.append('unexpected successes=%d' % unexpectedSuccesses)

        if infos:
            self.stream.writeln(' (%s)' % (', '.join(infos),))
        else:
            self.stream.write('\n')

        return result

def main(tests, verbose=0, color=True):
    suites = []

    # Dynamic load the requested module containing the test cases.
    for testfile in tests:

        module_dir, module_file = os.path.split(testfile)
        module_name, module_ext = os.path.splitext(module_file)

        # XXX: this looks really hacky, so cleanup is necessary.
        module_obj = __import__(module_dir.replace('/', '.'),
                                fromlist=[module_name])
        module_obj.__file__ = testfile
        globals()[module_name] = module_obj

        # Start the test runner and display the results to stdout.
        container = module_obj.__dict__[module_name]
        class_parts = module_name[5:].split('_')
        class_name = 'Test' + ''.join([p.capitalize() for p in class_parts])

        testcase = container.__dict__[class_name]
        suites += [unittest.TestLoader().loadTestsFromTestCase(testcase)]

    # Create the text runner and execute the tests.
    runner = TextTestRunner(verbosity=verbose, color=color)
    runner.run(unittest.TestSuite(suites))