46 lines
1.7 KiB
Python
46 lines
1.7 KiB
Python
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import unittest
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from test import support
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import filecmp
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import os
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import sys
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import subprocess
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SYMBOL_FILE = support.findfile('symbol.py')
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GRAMMAR_FILE = os.path.join(os.path.dirname(__file__),
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'..', '..', 'Include', 'graminit.h')
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TEST_PY_FILE = 'symbol_test.py'
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class TestSymbolGeneration(unittest.TestCase):
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def _copy_file_without_generated_symbols(self, source_file, dest_file):
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with open(source_file, 'rb') as fp:
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lines = fp.readlines()
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nl = lines[0][len(lines[0].rstrip()):]
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with open(dest_file, 'wb') as fp:
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fp.writelines(lines[:lines.index(b"#--start constants--" + nl) + 1])
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fp.writelines(lines[lines.index(b"#--end constants--" + nl):])
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def _generate_symbols(self, grammar_file, target_symbol_py_file):
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proc = subprocess.Popen([sys.executable,
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SYMBOL_FILE,
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grammar_file,
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target_symbol_py_file], stderr=subprocess.PIPE)
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stderr = proc.communicate()[1]
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return proc.returncode, stderr
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@unittest.skipIf(not os.path.exists(GRAMMAR_FILE),
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'test only works from source build directory')
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def test_real_grammar_and_symbol_file(self):
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self._copy_file_without_generated_symbols(SYMBOL_FILE, TEST_PY_FILE)
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self.addCleanup(support.unlink, TEST_PY_FILE)
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self.assertFalse(filecmp.cmp(SYMBOL_FILE, TEST_PY_FILE))
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self.assertEqual((0, b''), self._generate_symbols(GRAMMAR_FILE,
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TEST_PY_FILE))
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self.assertTrue(filecmp.cmp(SYMBOL_FILE, TEST_PY_FILE))
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if __name__ == "__main__":
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unittest.main()
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