107 lines
3.2 KiB
Python
107 lines
3.2 KiB
Python
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# coding=utf-8
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"""Tests for generating code from a non-annotated ast."""
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# Copyright 2017 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import ast
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import os.path
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import unittest
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from six import with_metaclass
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import pasta
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from pasta.base import codegen
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from pasta.base import test_utils
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TESTDATA_DIR = os.path.realpath(
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os.path.join(os.path.dirname(pasta.__file__), '../testdata'))
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def _is_syntax_valid(filepath):
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with open(filepath, 'r') as f:
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try:
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ast.parse(f.read())
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except SyntaxError:
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return False
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return True
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class AutoFormatTestMeta(type):
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def __new__(mcs, name, bases, inst_dict):
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# Helper function to generate a test method
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def auto_format_test_generator(input_file):
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def test(self):
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with open(input_file, 'r') as handle:
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src = handle.read()
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t = ast.parse(src)
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auto_formatted = codegen.to_str(t)
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self.assertMultiLineEqual(src, auto_formatted)
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return test
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# Add a test method for each input file
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test_method_prefix = 'test_auto_format_'
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data_dir = os.path.join(TESTDATA_DIR, 'codegen')
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for dirpath, _, files in os.walk(data_dir):
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for filename in files:
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if filename.endswith('.in'):
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full_path = os.path.join(dirpath, filename)
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inst_dict[test_method_prefix + filename[:-3]] = unittest.skipIf(
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not _is_syntax_valid(full_path),
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'Test contains syntax not supported by this version.',
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)(auto_format_test_generator(full_path))
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return type.__new__(mcs, name, bases, inst_dict)
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class AutoFormatTest(with_metaclass(AutoFormatTestMeta, test_utils.TestCase)):
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"""Tests that code without formatting info is printed neatly."""
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def test_imports(self):
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src = 'from a import b\nimport c, d\nfrom ..e import f, g\n'
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t = ast.parse(src)
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self.assertEqual(src, pasta.dump(t))
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@test_utils.requires_features('exec_node')
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def test_exec_node_default(self):
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src = 'exec foo in bar'
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t = ast.parse(src)
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self.assertEqual('exec(foo, bar)\n', pasta.dump(t))
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@test_utils.requires_features('bytes_node')
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def test_bytes(self):
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src = "b'foo'"
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t = ast.parse(src)
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self.assertEqual("b'foo'\n", pasta.dump(t))
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def test_default_indentation(self):
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for indent in (' ', ' ', '\t'):
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src ='def a():\n' + indent + 'b\n'
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t = pasta.parse(src)
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t.body.extend(ast.parse('def c(): d').body)
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self.assertEqual(codegen.to_str(t),
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src + 'def c():\n' + indent + 'd\n')
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def suite():
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result = unittest.TestSuite()
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result.addTests(unittest.makeSuite(AutoFormatTest))
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return result
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if __name__ == '__main__':
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unittest.main()
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