def test_no_unnamed_nodes(self):
"""Certain nodes, when translated, are missing names."""
grammar = r'''
Grammar: ArgumentsGrammar
start: <arguments-section>
<arguments-section>
::= <ahead> <line>
# Causes an missing production name.
| <ahead>
# Simplified the remaning grammar.
<line> ::= "TokenType\.LINE"
<ahead> ::= "TokenType\.AHEAD"
'''
tree = Parser().parse(grammar)
node = Translator().translate(tree)
python = node.to_python()
unacceptable_pattern = re.compile(r'P\([^"]')
self.assertEqual(
unacceptable_pattern.findall(python),
[],
'Found production which doesn\'t begin with a name:\n{}'.format(
python),
)
def test_translate_annotation_follows_pattern(self):
"""Annotations should be the first item in the tuple."""
grammar = r'''
start: <d>
<d> ::= <s>
<s> ::= @Wrong <l>
| @Wrong <l> <nl>
<l> ::= "l"
<nl> ::= "n" | ε
'''
tree = Parser().parse(grammar)
node = Translator().translate(tree)
python = node.to_python()
self.assertEqual(
python.count(', [Wrong]'),
0,
python,
)
