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_branch_true_dead(self):
"Test branch with the false branch being dead"
t = ast.Constant(True)
f = ast.Constant(False)
l = ast.Literal('foo')
v = ast.Number(42)
cmp = ast.CompareOperator('=', l, v)
n = ast.Branch(f, t, cmp)
# Should reduce to to the compare
c, r = optimizer.optimization_pass(n)
assert c == 1
assert r is cmp
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$")) == n9_name
n10 = ast.ContainsOperator(n1, n2)
n10_name = merge.node_name(n10)
assert ("ContainsOperator", ("Literal", "foo"), ("Number",
12.0)) == n10_name
# Logical operator returns literal!
n11 = ast.LogicalOperator('and', n1, n3)
n11_name = merge.node_name(n11)
assert ("Literal", "foo") == n11_name
# Literal set just uses name
n12 = ast.LiteralSet([n1, n2])
n12_name = merge.node_name(n12)
assert "LiteralSet" == n12_name
def test_names(self):
n1 = ast.Literal("foo")
assert ("Literal", "foo") == compact.node_name(n1)
n2 = ast.Number(12)
assert ("Number", 12) == compact.node_name(n2)
n3 = ast.Constant(True)
assert ("Constant", True) == compact.node_name(n3)
n4 = ast.Regex("^tubez$")
assert ("Regex", "^tubez$") == compact.node_name(n4)
n5 = ast.Undefined()
assert "Undefined" == compact.node_name(n5)
n6 = ast.Empty()
assert "Empty" == compact.node_name(n6)
n7 = ast.NegateOperator(n3)
assert ("NegateOperator", ("Constant", True)) == compact.node_name(n7)
n8 = ast.CompareOperator('=', n1, n2)
n8_name = compact.node_name(n8)
assert ("CompareOperator", "=", ("Literal", "foo"), ("Number",
12)) == n8_name
n9 = ast.MatchOperator(n1, n4)
n9_name = compact.node_name(n9)
assert ("MatchOperator", ("Literal", "foo"), ("Regex",
"^tubez$")) == n9_name
n10 = ast.ContainsOperator(n1, n2)
n10_name = compact.node_name(n10)
assert ("ContainsOperator", ("Literal", "foo"), ("Number",
12.0)) == n10_name
n11 = ast.LogicalOperator('and', n1, n3)
n11_name = compact.node_name(n11)
assert ("LogicalOperator", "and", ("Literal", "foo"),
("Constant", True)) == n11_name
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_bad_number(self):
a = ast.Number("0..0")
valid, info = a.validate()
assert not valid
assert "Failed to convert" in info["errors"][0]
def test_order_rewrite_numeric(self):
"Tests rewrite of numeric values"
# Model the predicate:
# foo < 25 or foo >= 50 or foo > 75 or foo <= 100
l = ast.Literal('foo')
v = ast.Number(25)
v1 = ast.Number(50)
v2 = ast.Number(75)
v3 = ast.Number(100)
cmp1 = ast.CompareOperator('<', l, v)
cmp2 = ast.CompareOperator('>=', l, v1)
cmp3 = ast.CompareOperator('>', l, v2)
cmp4 = ast.CompareOperator('<=', l, v3)
or1 = ast.LogicalOperator('or', cmp1, cmp2)
or2 = ast.LogicalOperator('or', cmp3, cmp4)
or3 = ast.LogicalOperator('or', or1, or2)
# Rewrite foo < 25 as true
name = merge.node_name(cmp1, True)
r = compare.order_rewrite(ast.dup(or3), name, cmp1, True)
assert isinstance(r.left.left, ast.Constant)
assert r.left.left.value == True
assert isinstance(r.left.right, ast.Constant)
assert r.left.right.value == False
assert isinstance(r.right.left, ast.Constant)
assert r.right.left.value == False
assert isinstance(r.right.right, ast.Constant)
assert r.right.right.value == True
# Rewrite foo < 25 as false
name = merge.node_name(cmp1, True)
r = compare.order_rewrite(ast.dup(or3), name, cmp1, False)
assert isinstance(r.left.left, ast.Constant)
assert r.left.left.value == False
# other cmps unchanges
assert ASTPattern(cmp2).matches(r.left.right)
assert ASTPattern(cmp3).matches(r.right.left)
assert ASTPattern(cmp4).matches(r.right.right)
# Rewrite foo >= 50 as true
name = merge.node_name(cmp2, True)
r = compare.order_rewrite(ast.dup(or3), name, cmp2, True)
assert isinstance(r.left.left, ast.Constant)
assert r.left.left.value == False
assert isinstance(r.left.right, ast.Constant)
assert r.left.right.value == True
assert ASTPattern(cmp3).matches(r.right.left)
assert ASTPattern(cmp4).matches(r.right.right)
# Rewrite foo >= 50 as false
name = merge.node_name(cmp2, True)
r = compare.order_rewrite(ast.dup(or3), name, cmp2, False)
assert ASTPattern(cmp1).matches(r.left.left)
assert isinstance(r.left.right, ast.Constant)
assert r.left.right.value == False
assert isinstance(r.right.left, ast.Constant)
assert r.right.left.value == False
assert isinstance(r.right.right, ast.Constant)
assert r.right.right.value == True
# Rewrite foo > 75 as true
name = merge.node_name(cmp3, True)
r = compare.order_rewrite(ast.dup(or3), name, cmp3, True)
assert isinstance(r.left.left, ast.Constant)
assert r.left.left.value == False
assert isinstance(r.left.right, ast.Constant)
assert r.left.right.value == True
assert isinstance(r.right.left, ast.Constant)
assert r.right.left.value == True
assert ASTPattern(cmp4).matches(r.right.right)
# Rewrite foo > 75 as False
name = merge.node_name(cmp3, True)
r = compare.order_rewrite(ast.dup(or3), name, cmp3, False)
assert ASTPattern(cmp1).matches(r.left.left)
assert ASTPattern(cmp2).matches(r.left.right)
assert isinstance(r.right.left, ast.Constant)
assert r.right.left.value == False
assert isinstance(r.right.right, ast.Constant)
assert r.right.right.value == True
# Rewrite foo <= 100 as True
name = merge.node_name(cmp4, True)
r = compare.order_rewrite(ast.dup(or3), name, cmp4, True)
assert ASTPattern(cmp1).matches(r.left.left)
assert ASTPattern(cmp2).matches(r.left.right)
assert ASTPattern(cmp3).matches(r.right.left)
assert isinstance(r.right.right, ast.Constant)
assert r.right.right.value == True
# Rewrite foo <= 100 as False
name = merge.node_name(cmp4, True)
r = compare.order_rewrite(ast.dup(or3), name, cmp4, False)
assert isinstance(r.left.left, ast.Constant)
assert r.left.left.value == False
assert isinstance(r.left.right, ast.Constant)
assert r.left.right.value == True
assert isinstance(r.right.left, ast.Constant)
assert r.right.left.value == True
assert isinstance(r.right.right, ast.Constant)
assert r.right.right.value == False