diff options
Diffstat (limited to 'third_party/rust/jsparagus/tests/test_parse_pgen.py')
-rw-r--r-- | third_party/rust/jsparagus/tests/test_parse_pgen.py | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/third_party/rust/jsparagus/tests/test_parse_pgen.py b/third_party/rust/jsparagus/tests/test_parse_pgen.py new file mode 100644 index 0000000000..5052f9069c --- /dev/null +++ b/third_party/rust/jsparagus/tests/test_parse_pgen.py @@ -0,0 +1,33 @@ +import unittest + +import jsparagus.gen +from jsparagus import parse_pgen, parse_pgen_generated + + +class ParsePgenTestCase(unittest.TestCase): + def test_self(self): + import os + filename = os.path.join(os.path.dirname(parse_pgen.__file__), "..", + "pgen.pgen") + grammar = parse_pgen.load_grammar(filename) + self.maxDiff = None + pgen_grammar = parse_pgen.pgen_grammar + self.assertEqual(pgen_grammar.nonterminals, grammar.nonterminals) + self.assertEqual(pgen_grammar.variable_terminals, + grammar.variable_terminals) + self.assertEqual(pgen_grammar.goals(), grammar.goals()) + + with open(parse_pgen_generated.__file__) as f: + pre_generated = f.read() + + import io + out = io.StringIO() + jsparagus.gen.generate_parser(out, grammar) + generated_from_file = out.getvalue() + + self.maxDiff = None + self.assertEqual(pre_generated, generated_from_file) + + +if __name__ == '__main__': + unittest.main() |