def test_parse_token_combinator():
# comb := NAME
grammar = Grammar()
token_id = grammar.add_token('Name')
result = make_combinator(grammar, 'Name')
assert isinstance(result, TokenCombinator)
assert result.token_id == token_id
def test_parse_repeat_combinator():
# comb := '{' seq '}'
grammar = Grammar()
token_id = grammar.add_token('Name')
result = make_combinator(grammar, '{ Name }')
assert isinstance(result, RepeatCombinator)
assert isinstance(result.combinator, TokenCombinator)
assert result.combinator.token_id == token_id
def test_parse_optional_combinator():
# comb := '[' seq ']'
grammar = Grammar()
token_id = grammar.add_token('Name')
result = make_combinator(grammar, '[ Name ]')
assert isinstance(result, OptionalCombinator)
assert isinstance(result.combinator, TokenCombinator)
assert result.combinator.token_id == token_id
def test_parse_token_priority_fail_combinator():
# comb := NAME
grammar = Grammar()
grammar.add_token('Name')
with pytest.raises(DiagnosticError):
make_combinator(grammar, 'Name <100>')