1"""Support code for test_*.py files"""
2# Author: Collin Winter
3
4# Python imports
5import unittest
6import os
7import os.path
8from textwrap import dedent
9
10# Local imports
11from lib2to3 import pytree, refactor
12from lib2to3.pgen2 import driver as pgen2_driver
13
14test_dir = os.path.dirname(__file__)
15proj_dir = os.path.normpath(os.path.join(test_dir, ".."))
16grammar_path = os.path.join(test_dir, "..", "Grammar.txt")
17grammar = pgen2_driver.load_grammar(grammar_path)
18grammar_no_print_statement = pgen2_driver.load_grammar(grammar_path)
19del grammar_no_print_statement.keywords["print"]
20driver = pgen2_driver.Driver(grammar, convert=pytree.convert)
21driver_no_print_statement = pgen2_driver.Driver(
22    grammar_no_print_statement,
23    convert=pytree.convert
24)
25
26def parse_string(string):
27    return driver.parse_string(reformat(string), debug=True)
28
29def run_all_tests(test_mod=None, tests=None):
30    if tests is None:
31        tests = unittest.TestLoader().loadTestsFromModule(test_mod)
32    unittest.TextTestRunner(verbosity=2).run(tests)
33
34def reformat(string):
35    return dedent(string) + "\n\n"
36
37def get_refactorer(fixer_pkg="lib2to3", fixers=None, options=None):
38    """
39    A convenience function for creating a RefactoringTool for tests.
40
41    fixers is a list of fixers for the RefactoringTool to use. By default
42    "lib2to3.fixes.*" is used. options is an optional dictionary of options to
43    be passed to the RefactoringTool.
44    """
45    if fixers is not None:
46        fixers = [fixer_pkg + ".fixes.fix_" + fix for fix in fixers]
47    else:
48        fixers = refactor.get_fixers_from_package(fixer_pkg + ".fixes")
49    options = options or {}
50    return refactor.RefactoringTool(fixers, options, explicit=True)
51
52def all_project_files():
53    for dirpath, dirnames, filenames in os.walk(proj_dir):
54        for filename in filenames:
55            if filename.endswith(".py"):
56                yield os.path.join(dirpath, filename)
57
58TestCase = unittest.TestCase
59