def test_parser_default_ebnf(patch):
patch.many(os.path, ['dirname', 'join', 'realpath'])
result = Parser.default_ebnf()
os.path.join.assert_called_with(os.path.dirname(), '..', 'grammar',
'grammar.ebnf')
os.path.realpath.assert_called_with(os.path.join())
assert result == os.path.realpath()
def test_parser_lark(patch, parser):
patch.init(Lark)
patch.object(Grammar, 'grammar')
patch.many(Parser, ['default_ebnf', 'indenter'])
result = parser.lark()
Grammar.grammar.assert_called_with(Parser.default_ebnf())
Lark.__init__.assert_called_with(Grammar.grammar(),
parser='lalr',
postlex=Parser.indenter())
assert isinstance(result, Lark)