STT-tensorflow/tensorflow/python/autograph/pyct/parser_test.py
Dan Moldovan a1b927ce1d Fix tests to pass on newer runtimes which track AST line and column numbers more accurately.
PiperOrigin-RevId: 320074378
Change-Id: I9a5838cae5673dccda170b7c420a5b6010c262ff
2020-07-07 15:36:56 -07:00

378 lines
11 KiB
Python

# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""Tests for parser module."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import re
import textwrap
import gast
from tensorflow.python.autograph.pyct import errors
from tensorflow.python.autograph.pyct import parser
from tensorflow.python.platform import test
class ParserTest(test.TestCase):
def test_parse_entity(self):
def f(x):
return x + 1
node, _ = parser.parse_entity(f, future_features=())
self.assertEqual('f', node.name)
def test_parse_lambda(self):
l = lambda x: x + 1
node, source = parser.parse_entity(l, future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x: (x + 1))')
self.assertEqual(source, 'lambda x: x + 1')
def test_parse_lambda_prefix_cleanup(self):
lambda_lam = lambda x: x + 1
node, source = parser.parse_entity(lambda_lam, future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x: (x + 1))')
self.assertEqual(source, 'lambda x: x + 1')
def test_parse_lambda_resolution_by_location(self):
_ = lambda x: x + 1
l = lambda x: x + 1
_ = lambda x: x + 1
node, source = parser.parse_entity(l, future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x: (x + 1))')
self.assertEqual(source, 'lambda x: x + 1')
def test_parse_lambda_resolution_by_signature(self):
l = lambda x: lambda x, y: x + y
node, source = parser.parse_entity(l, future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x: (lambda x, y: (x + y)))')
self.assertEqual(source, 'lambda x: lambda x, y: x + y')
node, source = parser.parse_entity(l(0), future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x, y: (x + y))')
self.assertEqual(source, 'lambda x, y: x + y')
def test_parse_lambda_resolution_ambiguous(self):
l = lambda x: lambda x: 2 * x
expected_exception_text = re.compile(r'found multiple definitions'
r'.+'
r'\(lambda x: \(lambda x'
r'.+'
r'\(lambda x: \(2', re.DOTALL)
with self.assertRaisesRegex(
errors.UnsupportedLanguageElementError,
expected_exception_text):
parser.parse_entity(l, future_features=())
with self.assertRaisesRegex(
errors.UnsupportedLanguageElementError,
expected_exception_text):
parser.parse_entity(l(0), future_features=())
def assertMatchesWithPotentialGarbage(self, source, expected, garbage):
# In runtimes which don't track end_col_number, the source contains the
# entire line, which in turn may have garbage from the surrounding context.
self.assertIn(source, (expected, expected + garbage))
def test_parse_lambda_multiline(self):
l = (
lambda x: lambda y: x + y # pylint:disable=g-long-lambda
- 1)
node, source = parser.parse_entity(l, future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x: (lambda y: ((x + y) - 1)))')
self.assertMatchesWithPotentialGarbage(
source, ('lambda x: lambda y: x + y # pylint:disable=g-long-lambda\n'
' - 1'), ')')
node, source = parser.parse_entity(l(0), future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda y: ((x + y) - 1))')
self.assertMatchesWithPotentialGarbage(
source, ('lambda y: x + y # pylint:disable=g-long-lambda\n'
' - 1'), ')')
def test_parse_lambda_in_expression(self):
l = (
lambda x: lambda y: x + y + 1,
lambda x: lambda y: x + y + 2,
)
node, source = parser.parse_entity(l[0], future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x: (lambda y: ((x + y) + 1)))')
self.assertMatchesWithPotentialGarbage(
source, 'lambda x: lambda y: x + y + 1', ',')
node, source = parser.parse_entity(l[0](0), future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda y: ((x + y) + 1))')
self.assertMatchesWithPotentialGarbage(
source, 'lambda y: x + y + 1', ',')
node, source = parser.parse_entity(l[1], future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x: (lambda y: ((x + y) + 2)))')
self.assertMatchesWithPotentialGarbage(source,
'lambda x: lambda y: x + y + 2', ',')
node, source = parser.parse_entity(l[1](0), future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda y: ((x + y) + 2))')
self.assertMatchesWithPotentialGarbage(source, 'lambda y: x + y + 2', ',')
def test_parse_lambda_complex_body(self):
l = lambda x: ( # pylint:disable=g-long-lambda
x.y(
[],
x.z,
(),
x[0:2],
),
x.u,
'abc',
1,
)
node, source = parser.parse_entity(l, future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
"(lambda x: (x.y([], x.z, (), x[0:2]), x.u, 'abc', 1))")
base_source = ('lambda x: ( # pylint:disable=g-long-lambda\n'
' x.y(\n'
' [],\n'
' x.z,\n'
' (),\n'
' x[0:2],\n'
' ),\n'
' x.u,\n'
' \'abc\',\n'
' 1,')
# The complete source includes the trailing parenthesis. But that is only
# detected in runtimes which correctly track end_lineno for ASTs.
self.assertIn(source, (base_source, base_source + '\n )'))
def test_parse_lambda_function_call_definition(self):
def do_parse_and_test(lam, **unused_kwargs):
node, source = parser.parse_entity(lam, future_features=())
self.assertEqual(
parser.unparse(node, include_encoding_marker=False),
'(lambda x: x)')
self.assertMatchesWithPotentialGarbage(
source, 'lambda x: x', ', named_arg=1)')
do_parse_and_test( # Intentional line break
lambda x: x, named_arg=1)
def test_parse_entity_print_function(self):
def f(x):
print(x)
node, _ = parser.parse_entity(f, future_features=('print_function',))
self.assertEqual('f', node.name)
def test_parse_comments(self):
def f():
# unindented comment
pass
node, _ = parser.parse_entity(f, future_features=())
self.assertEqual('f', node.name)
def test_parse_multiline_strings(self):
def f():
print("""
multiline
string""")
node, _ = parser.parse_entity(f, future_features=())
self.assertEqual('f', node.name)
def _eval_code(self, code, name):
globs = {}
exec(code, globs) # pylint:disable=exec-used
return globs[name]
def test_dedent_block_basic(self):
code = """
def f(x):
if x > 0:
return -x
return x
"""
f = self._eval_code(parser.dedent_block(code), 'f')
self.assertEqual(f(1), -1)
self.assertEqual(f(-1), -1)
def test_dedent_block_comments_out_of_line(self):
code = """
###
def f(x):
###
if x > 0:
###
return -x
###
###
return x
###
"""
f = self._eval_code(parser.dedent_block(code), 'f')
self.assertEqual(f(1), -1)
self.assertEqual(f(-1), -1)
def test_dedent_block_multiline_string(self):
code = """
def f():
'''
Docstring.
'''
return '''
1
2
3'''
"""
f = self._eval_code(parser.dedent_block(code), 'f')
self.assertEqual(f.__doc__, '\n Docstring.\n ')
self.assertEqual(f(), '\n 1\n 2\n 3')
def test_dedent_block_multiline_expression(self):
code = """
def f():
return (1,
2,
3)
"""
f = self._eval_code(parser.dedent_block(code), 'f')
self.assertEqual(f(), (1, 2, 3))
def test_dedent_block_continuation(self):
code = r"""
def f():
a = \
1
return a
"""
f = self._eval_code(parser.dedent_block(code), 'f')
self.assertEqual(f(), 1)
def test_dedent_block_continuation_in_string(self):
code = r"""
def f():
a = "a \
b"
return a
"""
f = self._eval_code(parser.dedent_block(code), 'f')
self.assertEqual(f(), 'a b')
def test_parse_expression(self):
node = parser.parse_expression('a.b')
self.assertEqual('a', node.value.id)
self.assertEqual('b', node.attr)
def test_unparse(self):
node = gast.If(
test=gast.Constant(1, kind=None),
body=[
gast.Assign(
targets=[
gast.Name(
'a',
ctx=gast.Store(),
annotation=None,
type_comment=None)
],
value=gast.Name(
'b', ctx=gast.Load(), annotation=None, type_comment=None))
],
orelse=[
gast.Assign(
targets=[
gast.Name(
'a',
ctx=gast.Store(),
annotation=None,
type_comment=None)
],
value=gast.Constant('c', kind=None))
])
source = parser.unparse(node, indentation=' ')
self.assertEqual(
textwrap.dedent("""
# coding=utf-8
if 1:
a = b
else:
a = 'c'
""").strip(), source.strip())
if __name__ == '__main__':
test.main()