def test_contains_rewrite(self):
s1 = ast.LiteralSet([ast.Number(1), ast.Number(2), ast.Number(3)])
s2 = ast.LiteralSet([ast.Number(1)])
s3 = ast.LiteralSet([
ast.Number(1),
ast.Number(2),
ast.Number(3),
ast.Number(4),
ast.Number(5)
])
s4 = ast.LiteralSet([ast.Number(6)])
s5 = ast.LiteralSet([ast.Number(2), ast.Number(3), ast.Number(4)])
l = ast.Literal('foo')
c1 = ast.ContainsOperator(s1, l)
c2 = ast.ContainsOperator(s2, l)
c3 = ast.ContainsOperator(s3, l)
c4 = ast.ContainsOperator(s4, l)
c5 = ast.ContainsOperator(s5, l)
# Rewrite set1 as True, s3 is super set, should be True
name = merge.node_name(c1, True)
r = contains.contains_rewrite(c3, name, c1, True)
assert isinstance(r, ast.Constant) and r.value == True
# Rewrite set1 as False, s3 is super set, should be trimed
name = merge.node_name(c1, True)
r = contains.contains_rewrite(c3, name, c1, False)
assert len(r.left.value) == 2
assert ast.Number(4) in r.left.value
assert ast.Number(5) in r.left.value
# Rewrite set1 as True, s2 is sub set, should check value
r = contains.contains_rewrite(c2, name, c1, True)
assert len(r.left.value) == 1
# Rewrite set1 as False, s2 is subset, should be false
r = contains.contains_rewrite(c2, name, c1, False)
assert isinstance(r, ast.Constant) and r.value == False
# Rewrite set1 as True, s4 has no overlap, should be false
r = contains.contains_rewrite(c4, name, c1, True)
assert isinstance(r, ast.Constant) and r.value == False
# Rewrite set1 as False, s4 is no overlap, should check
r = contains.contains_rewrite(c4, name, c1, False)
assert len(r.left.value) == 1
assert ast.Number(6) in r.left.value
# Rewrite set1 as True, s5 is has mostly overlap, should check
# the negation of s1 - s5
r = contains.contains_rewrite(c5, name, c1, True)
assert isinstance(r, ast.NegateOperator)
assert isinstance(r.left, ast.ContainsOperator)
assert len(r.left.left.value)
assert ast.Number(1) in r.left.left.value
def test_select_rewrite(self):
"Test rewrite selection"
settings = merge.RefactorSettings.deep()
s1 = ast.LiteralSet([ast.Number(1), ast.Number(2), ast.Number(3)])
s2 = ast.LiteralSet([ast.Number(1)])
s3 = ast.LiteralSet([ast.Number(1), ast.Number(2), ast.Number(3), ast.Number(4), ast.Number(5)])
l = ast.Literal('foo')
c1 = ast.ContainsOperator(s1, l)
c2 = ast.ContainsOperator(s2, l)
c3 = ast.ContainsOperator(s3, l)
name = merge.node_name(c1, True)
select = contains.select_rewrite_expression(settings, name, [c1, c2, c3])
assert select is c1
def test_select_rewrite_low_density(self):
"Test rewrite selection"
settings = merge.RefactorSettings.deep()
nums = [ast.Number(x) for x in range(100)]
s1 = ast.LiteralSet(nums)
nums = [ast.Number(x) for x in range(100, 200)]
s2 = ast.LiteralSet(nums)
l = ast.Literal('foo')
c1 = ast.ContainsOperator(s1, l)
c2 = ast.ContainsOperator(s2, l)
name = merge.node_name(c1, True)
select = contains.select_rewrite_expression(settings, name, [c1, c2])
# Density is too low
assert select is None
def test_litset_eval(self):
s = ast.LiteralSet([ast.Constant(True), ast.Literal('a'), ast.Literal('b')])
ctx = ast.EvalContext(MockPred(), {'a': 2, 'b': False})
res = s.eval(ctx)
assert isinstance(res, frozenset)
assert True in res
assert False in res
assert 2 in res
def test_rewrite_contains(self):
"Checks that a contain rewrite uses contains module"
l = ast.LiteralSet([ast.Number(1), ast.Number(2)])
r = ast.Literal('bar')
c = ast.ContainsOperator(l, r)
name = merge.node_name(c)
with patch('pypred.merge.contains.contains_rewrite') as cr:
merge.rewrite_ast(c, name, c, True)
assert cr.called
def test_litset_static(self):
s = ast.LiteralSet([ast.Constant(True), ast.Literal('\"a\"')])
pred = MockPred()
s.static_resolve(pred)
ctx = ast.EvalContext(pred, {'a': 2, 'b': False})
res = s.eval(ctx)
assert s.static
assert isinstance(res, set)
assert True in res
assert "a" in res
def test_select_expr_contains(self):
"Checks that a contains operation uses contains module"
l = ast.LiteralSet([ast.Number(1), ast.Number(2)])
r = ast.Literal('bar')
c = ast.ContainsOperator(l, r)
name = merge.node_name(c)
with patch('pypred.merge.contains.select_rewrite_expression') as cr:
merge.select_rewrite_expression(DEEP, name, [c])
assert cr.called
def test_names(self):
n1 = ast.Literal("foo")
assert ("Literal", "foo") == merge.node_name(n1)
n2 = ast.Number(12)
assert ("Number", 12) == merge.node_name(n2)
n3 = ast.Constant(True)
assert ("Constant", True) == merge.node_name(n3)
n4 = ast.Regex("^tubez$")
assert ("Regex", "^tubez$") == merge.node_name(n4)
n5 = ast.Undefined()
assert "Undefined" == merge.node_name(n5)
n6 = ast.Empty()
assert "Empty" == merge.node_name(n6)
# Negate does not emit the operator!
n7 = ast.NegateOperator(n3)
assert ("Constant", True) == merge.node_name(n7)
n8 = ast.CompareOperator('=', n1, n2)
n8_name = merge.node_name(n8)
assert ("CompareOperator", "=", ("Literal", "foo"), ("Number",
12)) == n8_name
n8_static = merge.node_name(n8, True)
assert ("CompareOperator", "equality", ("Literal", "foo"),
("Number", "static")) == n8_static
n9 = ast.MatchOperator(n1, n4)
n9_name = merge.node_name(n9)
assert ("MatchOperator", ("Literal", "foo"), ("Regex",
"^tubez$")) == n9_name
n10 = ast.ContainsOperator(n1, n2)
n10_name = merge.node_name(n10)
assert ("ContainsOperator", ("Literal", "foo"), ("Number",
12.0)) == n10_name
# Logical operator returns literal!
n11 = ast.LogicalOperator('and', n1, n3)
n11_name = merge.node_name(n11)
assert ("Literal", "foo") == n11_name
# Literal set just uses name
n12 = ast.LiteralSet([n1, n2])
n12_name = merge.node_name(n12)
assert "LiteralSet" == n12_name
def test_empty_set(self):
"Test removing an empty literal set"
s = ast.LiteralSet([])
c, r = optimizer.optimization_pass(s)
assert c == 1
assert isinstance(r, ast.Empty)
def test_set_comparison_valid_args(self, type):
a = ast.SetComparisonOperator(type, ast.Literal("foo"),
ast.LiteralSet([ast.Literal("bar")]))
valid, info = a.validate()
assert valid
