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/ lib64 / python2.7 / Demo / parser /

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test_unparse.py

import unittest
from test import test_support
import cStringIO
import sys
import os
import tokenize
import ast
import unparse

def read_pyfile(filename):
    """Read and return the contents of a Python source file (as a
    string), taking into account the file encoding."""
    with open(filename, "r") as pyfile:
        source = pyfile.read()
    return source

for_else = """\
def f():
    for x in range(10):
        break
    else:
        y = 2
    z = 3
"""

while_else = """\
def g():
    while True:
        break
    else:
        y = 2
    z = 3
"""

relative_import = """\
from . import fred
from .. import barney
from .australia import shrimp as prawns
"""

class_decorator = """\
@f1(arg)
@f2
class Foo: pass
"""

elif1 = """\
if cond1:
    suite1
elif cond2:
    suite2
else:
    suite3
"""

elif2 = """\
if cond1:
    suite1
elif cond2:
    suite2
"""

try_except_finally = """\
try:
    suite1
except ex1:
    suite2
except ex2:
    suite3
else:
    suite4
finally:
    suite5
"""

class ASTTestCase(unittest.TestCase):
    def assertASTEqual(self, ast1, ast2):
        dump1 = ast.dump(ast1)
        dump2 = ast.dump(ast2)
        self.assertEqual(ast.dump(ast1), ast.dump(ast2))

def check_roundtrip(self, code1, filename="internal"):
        ast1 = compile(code1, filename, "exec", ast.PyCF_ONLY_AST)
        unparse_buffer = cStringIO.StringIO()
        unparse.Unparser(ast1, unparse_buffer)
        code2 = unparse_buffer.getvalue()
        ast2 = compile(code2, filename, "exec", ast.PyCF_ONLY_AST)
        self.assertASTEqual(ast1, ast2)

class UnparseTestCase(ASTTestCase):
    # Tests for specific bugs found in earlier versions of unparse

def test_del_statement(self):
        self.check_roundtrip("del x, y, z")

def test_shifts(self):
        self.check_roundtrip("45 << 2")
        self.check_roundtrip("13 >> 7")

def test_for_else(self):
        self.check_roundtrip(for_else)

def test_while_else(self):
        self.check_roundtrip(while_else)

def test_unary_parens(self):
        self.check_roundtrip("(-1)**7")
        self.check_roundtrip("(-1.)**8")
        self.check_roundtrip("(-1j)**6")
        self.check_roundtrip("not True or False")
        self.check_roundtrip("True or not False")

def test_integer_parens(self):
        self.check_roundtrip("3 .__abs__()")

def test_huge_float(self):
        self.check_roundtrip("1e1000")
        self.check_roundtrip("-1e1000")
        self.check_roundtrip("1e1000j")
        self.check_roundtrip("-1e1000j")

def test_min_int(self):
        self.check_roundtrip(str(-sys.maxint-1))
        self.check_roundtrip("-(%s)" % (sys.maxint + 1))

def test_imaginary_literals(self):
        self.check_roundtrip("7j")
        self.check_roundtrip("-7j")
        self.check_roundtrip("-(7j)")
        self.check_roundtrip("0j")
        self.check_roundtrip("-0j")
        self.check_roundtrip("-(0j)")

def test_negative_zero(self):
        self.check_roundtrip("-0")
        self.check_roundtrip("-(0)")
        self.check_roundtrip("-0b0")
        self.check_roundtrip("-(0b0)")
        self.check_roundtrip("-0o0")
        self.check_roundtrip("-(0o0)")
        self.check_roundtrip("-0x0")
        self.check_roundtrip("-(0x0)")

def test_lambda_parentheses(self):
        self.check_roundtrip("(lambda: int)()")

def test_chained_comparisons(self):
        self.check_roundtrip("1 < 4 <= 5")
        self.check_roundtrip("a is b is c is not d")

def test_function_arguments(self):
        self.check_roundtrip("def f(): pass")
        self.check_roundtrip("def f(a): pass")
        self.check_roundtrip("def f(b = 2): pass")
        self.check_roundtrip("def f(a, b): pass")
        self.check_roundtrip("def f(a, b = 2): pass")
        self.check_roundtrip("def f(a = 5, b = 2): pass")
        self.check_roundtrip("def f(*args, **kwargs): pass")

def test_relative_import(self):
        self.check_roundtrip(relative_import)

def test_bytes(self):
        self.check_roundtrip("b'123'")

def test_set_literal(self):
        self.check_roundtrip("{'a', 'b', 'c'}")

def test_set_comprehension(self):
        self.check_roundtrip("{x for x in range(5)}")

def test_dict_comprehension(self):
        self.check_roundtrip("{x: x*x for x in range(10)}")

def test_class_decorators(self):
        self.check_roundtrip(class_decorator)

def test_elifs(self):
        self.check_roundtrip(elif1)
        self.check_roundtrip(elif2)

def test_try_except_finally(self):
        self.check_roundtrip(try_except_finally)

class DirectoryTestCase(ASTTestCase):
    """Test roundtrip behaviour on all files in Lib and Lib/test."""

# test directories, relative to the root of the distribution
    test_directories = 'Lib', os.path.join('Lib', 'test')

def test_files(self):
        # get names of files to test
        dist_dir = os.path.join(os.path.dirname(__file__), os.pardir, os.pardir)

names = []
        for d in self.test_directories:
            test_dir = os.path.join(dist_dir, d)
            for n in os.listdir(test_dir):
                if n.endswith('.py') and not n.startswith('bad'):
                    names.append(os.path.join(test_dir, n))

for filename in names:
            if test_support.verbose:
                print('Testing %s' % filename)
            source = read_pyfile(filename)
            self.check_roundtrip(source)

def test_main():
    test_support.run_unittest(UnparseTestCase, DirectoryTestCase)

if __name__ == '__main__':
    test_main()

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2024-06-15 08:33:51
..	dir	-	root/root	drwxr-xr-x	2024-06-15 08:33:51
FILES	text/plain	91 B	root/root	-rw-r--r--	2020-04-19 09:13:39
README	text/plain	1.01 KB	root/root	-rw-r--r--	2020-04-19 09:13:39
docstring.py	text/plain	27 B	root/root	-rw-r--r--	2020-04-19 09:13:39
docstring.pyc	application/x-bytecode.python	175 B	root/root	-rw-r--r--	2024-04-10 04:58:46
docstring.pyo	application/x-bytecode.python	175 B	root/root	-rw-r--r--	2024-04-10 04:58:46
example.py	text/plain	5.59 KB	root/root	-rw-r--r--	2020-04-19 09:13:39
example.pyc	application/x-bytecode.python	7.04 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
example.pyo	application/x-bytecode.python	7.04 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
simple.py	text/plain	29 B	root/root	-rw-r--r--	2020-04-19 09:13:39
simple.pyc	application/x-bytecode.python	279 B	root/root	-rw-r--r--	2024-04-10 04:58:46
simple.pyo	application/x-bytecode.python	279 B	root/root	-rw-r--r--	2024-04-10 04:58:46
source.py	text/plain	741 B	root/root	-rw-r--r--	2020-04-19 09:13:39
source.pyc	application/x-bytecode.python	1.55 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
source.pyo	application/x-bytecode.python	1.55 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
test_parser.py	text/x-script.python	1.16 KB	root/root	-rwxr-xr-x	2024-04-10 04:57:37
test_parser.pyc	application/x-bytecode.python	1.41 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
test_parser.pyo	application/x-bytecode.python	1.41 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
test_unparse.py	text/x-script.python	5.44 KB	root/root	-rw-r--r--	2020-04-19 09:13:39
test_unparse.pyc	application/x-bytecode.python	8.45 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
test_unparse.pyo	application/x-bytecode.python	8.45 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
unparse.py	text/x-script.python	16.85 KB	root/root	-rw-r--r--	2020-04-19 09:13:39
unparse.pyc	application/x-bytecode.python	23.44 KB	root/root	-rw-r--r--	2024-04-10 04:58:46
unparse.pyo	application/x-bytecode.python	23.36 KB	root/root	-rw-r--r--	2024-04-10 04:58:44