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|
import ast
import sys
import warnings
try:
import unittest2 as unittest
except ImportError:
import unittest
import astor
from astor.source_repr import split_lines
from .support import import_fresh_module
class GetSymbolTestCase(unittest.TestCase):
@unittest.skipUnless(sys.version_info >= (3, 5),
"ast.MatMult introduced in Python 3.5")
def test_get_mat_mult(self):
self.assertEqual('@', astor.get_op_symbol(ast.MatMult()))
class PublicAPITestCase(unittest.TestCase):
def test_aliases(self):
self.assertIs(astor.parse_file, astor.code_to_ast.parse_file)
def test_codegen_from_root(self):
with self.assertWarns(DeprecationWarning) as cm:
astor = import_fresh_module('astor')
astor.codegen.SourceGenerator
self.assertEqual(len(cm.warnings), 1)
# This message comes from 'astor/__init__.py'.
self.assertEqual(
str(cm.warning),
'astor.codegen is deprecated. Please use astor.code_gen.'
)
def test_codegen_as_submodule(self):
with self.assertWarns(DeprecationWarning) as cm:
import astor.codegen
self.assertEqual(len(cm.warnings), 1)
# This message comes from 'astor/codegen.py'.
self.assertEqual(
str(cm.warning),
'astor.codegen module is deprecated. Please import '
'astor.code_gen module instead.'
)
def test_to_source_invalid_customize_generator(self):
class InvalidGenerator:
pass
node = ast.parse('spam = 42')
with self.assertRaises(TypeError) as cm:
astor.to_source(node, source_generator_class=InvalidGenerator)
self.assertEqual(
str(cm.exception),
'source_generator_class should be a subclass of SourceGenerator',
)
with self.assertRaises(TypeError) as cm:
astor.to_source(
node,
source_generator_class=astor.SourceGenerator(indent_with=' ' * 4),
)
self.assertEqual(
str(cm.exception),
'source_generator_class should be a class',
)
class FastCompareTestCase(unittest.TestCase):
def test_fast_compare(self):
fast_compare = astor.node_util.fast_compare
def check(a, b):
ast_a = ast.parse(a)
ast_b = ast.parse(b)
dump_a = astor.dump_tree(ast_a)
dump_b = astor.dump_tree(ast_b)
self.assertEqual(dump_a == dump_b, fast_compare(ast_a, ast_b))
check('a = 3', 'a = 3')
check('a = 3', 'a = 5')
check('a = 3 - (3, 4, 5)', 'a = 3 - (3, 4, 5)')
check('a = 3 - (3, 4, 5)', 'a = 3 - (3, 4, 6)')
class TreeWalkTestCase(unittest.TestCase):
def test_auto_generated_attributes(self):
# See #136 for more details.
treewalk = astor.TreeWalk()
self.assertIsInstance(treewalk.__dict__, dict)
# Check that the inital state of the instance is empty.
self.assertEqual(treewalk.__dict__['nodestack'], [])
self.assertEqual(treewalk.__dict__['pre_handlers'], {})
self.assertEqual(treewalk.__dict__['post_handlers'], {})
class SourceReprTestCase(unittest.TestCase):
"""
Tests for helpers in astor.source_repr module.
Note that these APIs are not public.
"""
@unittest.skipUnless(sys.version_info[0] == 2, 'only applies to Python 2')
def test_split_lines_unicode_support(self):
source = [u'copy', '\n']
self.assertEqual(split_lines(source), source)
if __name__ == '__main__':
unittest.main()
|
