def test_tile(self):
p = tiler.SimplePattern('types:CompareOperator AND op:=',
'types:Literal', 'types:Literal')
l1 = ast.Literal('foo')
r1 = ast.Literal('bar')
n1 = ast.CompareOperator('=', l1, r1)
l2 = ast.Literal('zip')
r2 = ast.Literal('baz')
n2 = ast.CompareOperator('=', l2, r2)
n = ast.LogicalOperator('or', n1, n2)
i = {'count': 0}
def func(pattern, node):
assert pattern == p
count = i['count']
if count == 0:
assert node == n1
if count == 1:
assert node == n2
i['count'] += 1
assert n == tiler.tile(n, [p], func)
assert i['count'] == 2
def test_order_rewrite_literal(self):
"Tests rewrite of literal values"
# Model the predicate:
# foo < bar or foo >= bar or foo > zip or foo <= zip
l = ast.Literal('foo')
v = ast.Literal('bar')
v2 = ast.Literal('zip')
cmp1 = ast.CompareOperator('<', l, v)
cmp2 = ast.CompareOperator('>=', l, v)
cmp3 = ast.CompareOperator('>', l, v2)
cmp4 = ast.CompareOperator('<=', l, v2)
or1 = ast.LogicalOperator('or', cmp1, cmp2)
or2 = ast.LogicalOperator('or', cmp3, cmp4)
or3 = ast.LogicalOperator('or', or1, or2)
# Rewrite foo < bar 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 ASTPattern(or2).matches(r.right)
# Rewrite foo < bar 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
assert isinstance(r.left.right, ast.Constant)
assert r.left.right.value == True
assert ASTPattern(or2).matches(r.right)
def test_simple_pattern_op_type(self):
l = ast.Literal('foo')
r = ast.Literal('foo')
n = ast.CompareOperator('>', l, r)
p = tiler.SimplePattern('types:CompareOperator AND op:=',
'types:Literal', 'types:Literal')
assert not p.matches(n)
n = ast.CompareOperator('=', l, r)
assert p.matches(n)
def test_ast_pattern(self):
l = ast.Literal('foo')
b = ast.Literal('bar')
c = ast.CompareOperator('is', l, b)
p = tiler.ASTPattern(c)
assert p.matches(c)
# Change a node
z = ast.Number(42)
c1 = ast.CompareOperator('is', l, z)
assert not p.matches(c1)
def test_select_rewrite_ord_literals(self):
"Test rewrite selection for ordered with literals"
l = ast.Literal('foo')
v = ast.Literal('bar')
v2 = ast.Literal('baz')
cmp1 = ast.CompareOperator('>', l, v2)
cmp2 = ast.CompareOperator('<', l, v)
cmp3 = ast.CompareOperator('>', l, v)
name = merge.node_name(cmp1, True)
select = compare.select_rewrite_expression(name, [cmp1, cmp2, cmp3])
assert select is cmp2
def test_select_rewrite_eq(self):
"Test rewrite selection for equality"
l = ast.Literal('foo')
v = ast.Number(42)
v2 = ast.Number(11)
cmp1 = ast.CompareOperator('=', l, v2)
cmp2 = ast.CompareOperator('=', l, v)
cmp3 = ast.CompareOperator('=', l, v)
name = merge.node_name(cmp1, True)
select = compare.select_rewrite_expression(name, [cmp1, cmp2, cmp3])
assert select is cmp2
def test_equality_rewrite_diff_static(self):
"Test an equality rewrite with different static values"
l = ast.Literal('foo')
s = ast.Literal('"test"')
s.static = True
s.static_val = "test"
s1 = ast.Literal('"other"')
s1.static = True
s1.static_val = "other"
cmp1 = ast.CompareOperator('=', l, s)
cmp2 = ast.CompareOperator('=', l, s1)
or1 = ast.LogicalOperator('or', cmp1, cmp2)
# Rewrite foo = "test" as True
# Left should be True, right should be False
name = merge.node_name(cmp1, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp1, True)
assert isinstance(r.left, ast.Constant)
assert r.left.value == True
assert isinstance(r.right, ast.Constant)
assert r.right.value == False
# Rewrite foo = "test" as False
# Left should be False, right should be same
name = merge.node_name(cmp1, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp1, False)
assert isinstance(r.left, ast.Constant)
assert r.left.value == False
assert ASTPattern(cmp2).matches(r.right)
# Rewrite foo = "other" as True
# Left should be False, right should be True
name = merge.node_name(cmp2, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp2, True)
assert isinstance(r.left, ast.Constant)
assert r.left.value == False
assert isinstance(r.right, ast.Constant)
assert r.right.value == True
# Rewrite foo = "other" as False
# Left should be same, right should be False
name = merge.node_name(cmp2, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp2, False)
assert ASTPattern(cmp1).matches(r.left)
assert isinstance(r.right, ast.Constant)
assert r.right.value == False
def test_select_rewrite_ord_numeric(self):
"Test rewrite selection for ordered with numerics"
l = ast.Literal('foo')
v = ast.Number(42)
v2 = ast.Number(11)
v3 = ast.Number(100)
cmp1 = ast.CompareOperator('>', l, v)
cmp2 = ast.CompareOperator('<', l, v2)
cmp3 = ast.CompareOperator('>', l, v3)
name = merge.node_name(cmp1, True)
select = compare.select_rewrite_expression(name, [cmp1, cmp2, cmp3])
assert select is cmp1
def test_cache(self):
l = ast.Literal('foo')
v = ast.Number(42)
gt1 = ast.CompareOperator('>', l, v)
l1 = ast.Literal('foo')
v1 = ast.Number(42)
gt2 = ast.CompareOperator('>', l1, v1)
n = ast.LogicalOperator('or', gt1, gt2)
cache.cache_expressions(n)
# Both sides should be dedupped
assert n.left is n.right
assert n.left.cache_id == 0
def test_compact(self):
l = ast.Literal('foo')
v = ast.Number(42)
gt = ast.CompareOperator('>', l, v)
l1 = ast.Literal('foo')
v1 = ast.Number(42)
lt = ast.CompareOperator('<', l1, v1)
n = ast.LogicalOperator('or', gt, lt)
compact.compact(n)
# Literal and number should be de-dupped
assert l is n.right.left
assert v is n.right.right
def test_equality_rewrite_static(self):
"Test an equality rewrite with static values"
l = ast.Literal('foo')
s = ast.Literal('"test"')
s.static = True
s.static_val = "test"
cmp1 = ast.CompareOperator('=', l, s)
cmp2 = ast.CompareOperator('!=', l, s)
or1 = ast.LogicalOperator('or', cmp1, cmp2)
# Rewrite foo = "test" as True
# Left should be True, right should be False
name = merge.node_name(cmp1, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp1, True)
assert isinstance(r.left, ast.Constant)
assert r.left.value == True
assert isinstance(r.right, ast.Constant)
assert r.right.value == False
# Rewrite foo = "test" as False
# Left should be False, right should be True
name = merge.node_name(cmp1, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp1, False)
assert isinstance(r.left, ast.Constant)
assert r.left.value == False
assert isinstance(r.right, ast.Constant)
assert r.right.value == True
# Rewrite foo != "test" as True
# Left should be False, right should be True
name = merge.node_name(cmp2, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp2, True)
assert isinstance(r.left, ast.Constant)
assert r.left.value == False
assert isinstance(r.right, ast.Constant)
assert r.right.value == True
# Rewrite foo != "test" as False
# Left should be False, right should be True
name = merge.node_name(cmp2, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp2, False)
assert isinstance(r.left, ast.Constant)
assert r.left.value == True
assert isinstance(r.right, ast.Constant)
assert r.right.value == False
def test_simple_pattern_value(self):
l = ast.Literal('foo')
r = ast.Constant(True)
n = ast.CompareOperator('=', l, r)
p = tiler.SimplePattern('types:CompareOperator AND ops:=',
'types:Literal', 'types:Constant AND value:True')
assert p.matches(n)
def test_simple_pattern_ops(self):
l = ast.Literal('foo')
r = ast.Literal('foo')
n = ast.CompareOperator('<=', l, r)
p = tiler.SimplePattern('ops:>,>=,<,<=',
'types:Literal', 'types:Literal')
assert p.matches(n)
def test_rewrite_compare(self):
"Checks that a compare rewrite uses compare module"
l = ast.Literal('foo')
r = ast.Literal('bar')
n = ast.CompareOperator('>', l, r)
name = merge.node_name(n)
with patch('pypred.merge.compare.compare_rewrite') as c:
merge.rewrite_ast(n, name, n, True)
assert c.called
def test_canonical_non_literal(self):
"Test canonicalization, literals on left"
v = ast.Number(42)
l = ast.Literal('foo')
cmp = ast.CompareOperator('=', v, l)
compare.canonicalize(cmp)
assert cmp.left is l
assert cmp.right is v
def test_equality_rewrite_literals(self):
"Test an equality rewrite with different literals"
l = ast.Literal('foo')
v = ast.Literal('bar')
v2 = ast.Literal('baz')
cmp1 = ast.CompareOperator('=', l, v)
cmp2 = ast.CompareOperator('=', l, v2)
or1 = ast.LogicalOperator('or', cmp1, cmp2)
# Rewrite foo = bar as True
# Left should be True, right should be unchanged
name = merge.node_name(cmp1, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp1, True)
assert isinstance(r.left, ast.Constant)
assert r.left.value == True
assert ASTPattern(cmp2).matches(r.right)
# Rewrite foo = bar as False
# Left should be False, right should be same
name = merge.node_name(cmp1, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp1, False)
assert isinstance(r.left, ast.Constant)
assert r.left.value == False
assert ASTPattern(cmp2).matches(r.right)
# Rewrite foo = baz as True
# Left should be same, right should be True
name = merge.node_name(cmp2, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp2, True)
assert ASTPattern(cmp1).matches(r.left)
assert isinstance(r.right, ast.Constant)
assert r.right.value == True
# Rewrite foo = baz as False
# Left should be same, right should be False
name = merge.node_name(cmp2, True)
r = compare.equality_rewrite(ast.dup(or1), name, cmp2, False)
assert ASTPattern(cmp1).matches(r.left)
assert isinstance(r.right, ast.Constant)
assert r.right.value == False
def test_canonical_literal_order(self):
"Test canonicalization, literals on left"
l = ast.Literal('foo')
r = ast.Literal('zip')
cmp = ast.CompareOperator('>', r, l)
compare.canonicalize(cmp)
assert cmp.left is l
assert cmp.right is r
assert cmp.type == "<"
def test_select_expr_compare(self):
"Checks that a compare operation uses compare module"
l = ast.Literal('foo')
r = ast.Literal('bar')
n = ast.CompareOperator('>', l, r)
name = merge.node_name(n)
with patch('pypred.merge.compare.select_rewrite_expression') as c:
merge.select_rewrite_expression(DEEP, name, [n])
assert c.called
def test_or_dead(self):
"Tests removing OR with dead branch"
f = ast.Constant(False)
l = ast.Literal('foo')
v = ast.Number(42)
cmp = ast.CompareOperator('=', l, v)
n = ast.LogicalOperator('or', f, cmp)
# Should reduce to to the compare
c, r = optimizer.optimization_pass(n)
assert c == 1
assert r is cmp
def test_canonical_non_static(self):
"Test canonicalization, literals on left"
static = ast.Literal("'string'")
static.static = True
static.static_val = 'string'
l = ast.Literal('foo')
cmp = ast.CompareOperator('=', static, l)
compare.canonicalize(cmp)
assert cmp.left is l
assert cmp.right is static
def test_and_dead_right(self):
"Tests removing AND with dead branch, right side"
t = ast.Constant(True)
l = ast.Literal('foo')
v = ast.Number(42)
cmp = ast.CompareOperator('=', l, v)
n = ast.LogicalOperator('and', cmp, t)
# Should reduce to to the compare
c, r = optimizer.optimization_pass(n)
assert c == 1
assert r is cmp
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_branch(self):
l = ast.Literal('a')
r = ast.Literal('b')
check = ast.CompareOperator('>', l, r)
true = ast.Constant(True)
false = ast.Constant(False)
b = ast.Branch(check, true, false)
assert b.evaluate(MockPred(), {'a': 2, 'b':1})
res, ctx = b.analyze(MockPred(), {'a': 1, 'b':2})
assert not res
assert ctx.literals["a"] == 1
assert ctx.literals["b"] == 2
assert ctx.failed[-1].startswith("Right hand side")
def test_compare_empty(self, type):
l = ast.Literal("l")
r = ast.Literal("r")
a = ast.CompareOperator(type, l, r)
d = {"l": 1, "r": ast.Empty()}
res, ctx = a.analyze(MockPred(), d)
# Determine the expected result
if type == "!=":
assert res
else:
assert not res
if not res:
assert ("%s comparison at" % type.upper()) in ctx.failed[0]
assert ctx.literals["l"] == d["l"]
assert ctx.literals["r"] == ast.Empty()
def test_canonical_static_order(self):
"Test canonicalization, static ordering"
static = ast.Literal("'string'")
static.static = True
static.static_val = 'string'
static2 = ast.Literal("'foo'")
static2.static = True
static2.static_val = 'foo'
cmp = ast.CompareOperator('<', static, static2)
compare.canonicalize(cmp)
assert cmp.left is static2
assert cmp.right is static
assert cmp.type == ">"
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$")) == n9_name
n10 = ast.ContainsOperator(n1, n2)
n10_name = merge.node_name(n10)
assert ("ContainsOperator", ("Literal", "foo"), ("Number",
12.0)) == n10_name
# Logical operator returns literal!
n11 = ast.LogicalOperator('and', n1, n3)
n11_name = merge.node_name(n11)
assert ("Literal", "foo") == n11_name
# Literal set just uses name
n12 = ast.LiteralSet([n1, n2])
n12_name = merge.node_name(n12)
assert "LiteralSet" == n12_name
def test_compare(self, type):
l = ast.Literal("l")
r = ast.Literal("r")
a = ast.CompareOperator(type, l, r)
d = {"l": 1, "r": 5}
res, ctx = a.analyze(MockPred(), d)
# Determine the expected result
if type == "=":
s = '%d %s %d' % (d["l"], "==", d["r"])
else:
s = '%d %s %d' % (d["l"], type, d["r"])
expected = eval(s)
assert res == expected
if not res:
assert ("%s comparison at" % type.upper()) in ctx.failed[0]
assert ctx.literals["l"] == d["l"]
assert ctx.literals["r"] == d["r"]
def test_names(self):
n1 = ast.Literal("foo")
assert ("Literal", "foo") == compact.node_name(n1)
n2 = ast.Number(12)
assert ("Number", 12) == compact.node_name(n2)
n3 = ast.Constant(True)
assert ("Constant", True) == compact.node_name(n3)
n4 = ast.Regex("^tubez$")
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_bad_child(self):
c = ast.CompareOperator("!", ast.Literal("foo"), ast.Empty())
a = ast.LogicalOperator("and", ast.Literal("foo"), c)
valid, info = a.validate()
assert not valid
assert "Unknown compare" in info["errors"][0]
def test_bad_compare(self):
a = ast.CompareOperator("!", ast.Literal("foo"), ast.Empty())
valid, info = a.validate()
assert not valid
assert "Unknown compare" in info["errors"][0]