def testCommonSequenceAfterRepetition(self):
a = builder.makeSequence([
Repetition(Null, Sequence([NonTerminal("b"),
Terminal("a")])),
NonTerminal("b"),
Terminal("a")
])
b = Repetition(Sequence([NonTerminal("b"), Terminal("a")]), Null)
self.assertEqual(a, b)
def testNullInSequence(self):
a = builder.makeSequence(
[NonTerminal("foo"), Null,
Terminal("bar"), Null,
Terminal("baz")])
b = Sequence([NonTerminal("foo"), Terminal("bar"), Terminal("baz")])
self.assertEqual(a, b)
def testSequence(self):
self.rules = [
Rule(
"sequence",
Sequence([
NonTerminal("with"),
NonTerminal("one"),
NonTerminal("branch")
]))
]
def testNull(self):
self.rules = [
Rule(
"sequence with null",
Sequence([
Terminal("space here ->"), Null,
Terminal("should be like here ->"),
Terminal("foo")
]))
]
def testNoCommonNullAfterRepetition(self):
a = builder.makeSequence(
[Repetition(NonTerminal("b"), Null),
Terminal("d")])
b = Sequence([Repetition(NonTerminal("b"), Null), Terminal("d")])
self.assertEqual(a, b)