File: test_appliance.py

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import sys, os, os.path, types, traceback, pprint

DATA = 'tests/data'

def find_test_functions(collections):
    if not isinstance(collections, list):
        collections = [collections]
    functions = []
    for collection in collections:
        if not isinstance(collection, dict):
            collection = vars(collection)
        for key in sorted(collection):
            value = collection[key]
            if isinstance(value, types.FunctionType) and hasattr(value, 'unittest'):
                functions.append(value)
    return functions

def find_test_filenames(directory):
    filenames = {}
    for filename in os.listdir(directory):
        if os.path.isfile(os.path.join(directory, filename)):
            base, ext = os.path.splitext(filename)
            if base.endswith('-py2'):
                continue
            filenames.setdefault(base, []).append(ext)
    filenames = sorted(filenames.items())
    return filenames

def parse_arguments(args):
    if args is None:
        args = sys.argv[1:]
    verbose = False
    if '-v' in args:
        verbose = True
        args.remove('-v')
    if '--verbose' in args:
        verbose = True
        args.remove('--verbose')
    if 'YAML_TEST_VERBOSE' in os.environ:
        verbose = True
    include_functions = []
    if args:
        include_functions.append(args.pop(0))
    if 'YAML_TEST_FUNCTIONS' in os.environ:
        include_functions.extend(os.environ['YAML_TEST_FUNCTIONS'].split())
    include_filenames = []
    include_filenames.extend(args)
    if 'YAML_TEST_FILENAMES' in os.environ:
        include_filenames.extend(os.environ['YAML_TEST_FILENAMES'].split())
    return include_functions, include_filenames, verbose

def execute(function, filenames, verbose):
    name = function.__name__
    if verbose:
        sys.stdout.write('='*75+'\n')
        sys.stdout.write('%s(%s)...\n' % (name, ', '.join(filenames)))
    try:
        function(verbose=verbose, *filenames)
    except Exception as exc:
        info = sys.exc_info()
        if isinstance(exc, AssertionError):
            kind = 'FAILURE'
        else:
            kind = 'ERROR'
        if verbose:
            traceback.print_exc(limit=1, file=sys.stdout)
        else:
            sys.stdout.write(kind[0])
            sys.stdout.flush()
    else:
        kind = 'SUCCESS'
        info = None
        if not verbose:
            sys.stdout.write('.')
    sys.stdout.flush()
    return (name, filenames, kind, info)

def display(results, verbose):
    if results and not verbose:
        sys.stdout.write('\n')
    total = len(results)
    failures = 0
    errors = 0
    for name, filenames, kind, info in results:
        if kind == 'SUCCESS':
            continue
        if kind == 'FAILURE':
            failures += 1
        if kind == 'ERROR':
            errors += 1
        sys.stdout.write('='*75+'\n')
        sys.stdout.write('%s(%s): %s\n' % (name, ', '.join(filenames), kind))
        if kind == 'ERROR':
            traceback.print_exception(file=sys.stdout, *info)
        else:
            sys.stdout.write('Traceback (most recent call last):\n')
            traceback.print_tb(info[2], file=sys.stdout)
            sys.stdout.write('%s: see below\n' % info[0].__name__)
            sys.stdout.write('~'*75+'\n')
            for arg in info[1].args:
                pprint.pprint(arg, stream=sys.stdout)
        for filename in filenames:
            sys.stdout.write('-'*75+'\n')
            sys.stdout.write('%s:\n' % filename)
            data = open(filename, 'r', errors='replace').read()
            sys.stdout.write(data)
            if data and data[-1] != '\n':
                sys.stdout.write('\n')
    sys.stdout.write('='*75+'\n')
    sys.stdout.write('TESTS: %s\n' % total)
    if failures:
        sys.stdout.write('FAILURES: %s\n' % failures)
        sys.exit(1)
    if errors:
        sys.stdout.write('ERRORS: %s\n' % errors)
        sys.exit(1)
    return not (failures or errors)

def run(collections, args=None):
    test_functions = find_test_functions(collections)
    test_filenames = find_test_filenames(DATA)
    include_functions, include_filenames, verbose = parse_arguments(args)
    results = []
    for function in test_functions:
        if include_functions and function.__name__ not in include_functions:
            continue
        if function.unittest:
            for base, exts in test_filenames:
                if include_filenames and base not in include_filenames:
                    continue
                filenames = []
                for ext in function.unittest:
                    if ext not in exts:
                        break
                    filenames.append(os.path.join(DATA, base+ext))
                else:
                    skip_exts = getattr(function, 'skip', [])
                    for skip_ext in skip_exts:
                        if skip_ext in exts:
                            break
                    else:
                        result = execute(function, filenames, verbose)
                        results.append(result)
        else:
            result = execute(function, [], verbose)
            results.append(result)
    return display(results, verbose=verbose)