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_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_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
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
