def test_Less_Lookahead_ClosedTF(self):
i0c = self.is_C_0(closed=True, la=Grammar.LookaheadSet({self.c}))
i0d = self.is_C_0(closed=False, la=Grammar.LookaheadSet({self.d}))
# We only compare on content, never by the index. So closure
# doesn't matter here.
self.assertLess(i0c, i0d)
self.assertGreater(i0d, i0c)
def test_Equal_Lookahead_ClosedTF(self):
i0c = self.is_C_0(closed=True, la=Grammar.LookaheadSet({self.c}))
i0d = self.is_C_0(closed=False, la=Grammar.LookaheadSet({self.d}))
self.assertEqual(i0c, i0c)
self.assertEqual(i0d, i0d)
self.assertFalse(i0c == i0d)
self.assertFalse(i0d == i0c)
def test_Equal_Lookahead(self):
i0c = self.is_C_0(la=Grammar.LookaheadSet({self.c}))
i0d = self.is_C_0(la=Grammar.LookaheadSet({self.d}))
self.assertEqual(i0c, i0c)
self.assertEqual(i0d, i0d)
self.assertFalse(i0c == i0d)
self.assertFalse(i0d == i0c)
def setUp(self):
self.g = Grammar.Grammar.Load(DRAGON_BOOK_EXAMPLE_4_42,
'translation_unit')
self.L = self.g.rules[Grammar.LANGUAGE]
self.C = self.g.rules["C"]
self.c = self.g.rules["c"]
self.d = self.g.rules["d"]
self.l_empty = Grammar.LookaheadSet({})
self.l_end = Grammar.LookaheadSet({self.g.MakeEndOfText()})
self.l_end_and = Grammar.LookaheadSet(
{self.g.MakeFixed('end'),
self.g.MakeEndOfText()})
def setUp(self):
self.g = Grammar.Grammar.Load(DRAGON_BOOK_EXAMPLE_4_42,
'translation_unit')
self.C = self.g.rules["C"]
self.c = self.g.rules["c"]
self.d = self.g.rules["d"]
self.el = Grammar.LookaheadSet({})
def test_merge_overlap(self):
x = Grammar.LookaheadSet({1, 2, 4})
b = x.merge(Grammar.LookaheadSet({1, 2, 3}))
self.assertEqual(str(x), "{1 2 3 4}")
self.assertTrue(b)
def test_merge_disjoint(self):
x = Grammar.LookaheadSet({-1, 9, 4})
b = x.merge(Grammar.LookaheadSet({1, 2, 3}))
self.assertEqual(str(x), "{-1 1 2 3 4 9}")
self.assertTrue(b)
def test_merge_same(self):
x = Grammar.LookaheadSet({1, 2, 3})
b = x.merge(Grammar.LookaheadSet({1, 2, 3}))
self.assertEqual(str(x), "{1 2 3}")
self.assertFalse(b)
def test_str_several_is_ordered(self):
x = Grammar.LookaheadSet({9, 2, 1})
self.assertEqual(str(x), "{1 2 9}")
def test_str_empty(self):
x = Grammar.LookaheadSet({})
self.assertEqual(str(x), "{}")
def test_init_several(self):
x = Grammar.LookaheadSet({1, 2, 9})
self.assertTrue(x == set({9, 2, 1}))
def test_init_single(self):
x = Grammar.LookaheadSet({1})
self.assertTrue(x == set({1}))
def test_init_empty(self):
x = Grammar.LookaheadSet()
self.assertTrue(x == set())
def test_Less_Lookahead_ClosedFT(self):
i0c = self.is_C_0(closed=False, la=Grammar.LookaheadSet({self.c}))
i0d = self.is_C_0(closed=True, la=Grammar.LookaheadSet({self.d}))
self.assertLess(i0c, i0d)
self.assertGreater(i0d, i0c)
def test_Less_Lookahead(self):
i0c = self.is_C_0(la=Grammar.LookaheadSet({self.c}))
i0d = self.is_C_0(la=Grammar.LookaheadSet({self.d}))
self.assertLess(i0c, i0d)
self.assertGreater(i0d, i0c)
def is_C_1(self, closed=True, la=Grammar.LookaheadSet({})):
result = Grammar.ItemSet(self.g, {self.iC(1): la})
result = result.close(self.g) if closed else result
return result
