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✏️ test_symbol.py
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import unittest from test import support import os import sys import sysconfig import subprocess SYMBOL_FILE = support.findfile('symbol.py') GEN_SYMBOL_FILE = os.path.join(os.path.dirname(__file__), '..', '..', 'Tools', 'scripts', 'generate_symbol_py.py') GRAMMAR_FILE = os.path.join(os.path.dirname(__file__), '..', '..', 'Include', 'graminit.h') TEST_PY_FILE = 'symbol_test.py' class TestSymbolGeneration(unittest.TestCase): def _copy_file_without_generated_symbols(self, source_file, dest_file): with open(source_file) as fp: lines = fp.readlines() with open(dest_file, 'w') as fp: fp.writelines(lines[:lines.index("#--start constants--\n") + 1]) fp.writelines(lines[lines.index("#--end constants--\n"):]) def _generate_symbols(self, grammar_file, target_symbol_py_file): proc = subprocess.Popen([sys.executable, GEN_SYMBOL_FILE, grammar_file, target_symbol_py_file], stderr=subprocess.PIPE) stderr = proc.communicate()[1] return proc.returncode, stderr def compare_files(self, file1, file2): with open(file1) as fp: lines1 = fp.readlines() with open(file2) as fp: lines2 = fp.readlines() self.assertEqual(lines1, lines2) @unittest.skipUnless(sysconfig.is_python_build(), 'test only works from source build directory') def test_real_grammar_and_symbol_file(self): output = support.TESTFN self.addCleanup(support.unlink, output) self._copy_file_without_generated_symbols(SYMBOL_FILE, output) exitcode, stderr = self._generate_symbols(GRAMMAR_FILE, output) self.assertEqual(b'', stderr) self.assertEqual(0, exitcode) self.compare_files(SYMBOL_FILE, output) if __name__ == "__main__": unittest.main()
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