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from Cython.TestUtils import CythonTest
from Cython.Compiler.TreeFragment import *
from Cython.Compiler.Nodes import *
from Cython.Compiler.UtilNodes import *
import Cython.Compiler.Naming as Naming
class TestTreeFragments(CythonTest):
def test_basic(self):
F = self.fragment(u"x = 4")
T = F.copy()
self.assertCode(u"x = 4", T)
def test_copy_is_taken(self):
F = self.fragment(u"if True: x = 4")
T1 = F.root
T2 = F.copy()
self.assertEqual("x", T2.stats[0].if_clauses[0].body.lhs.name)
T2.stats[0].if_clauses[0].body.lhs.name = "other"
self.assertEqual("x", T1.stats[0].if_clauses[0].body.lhs.name)
def test_substitutions_are_copied(self):
T = self.fragment(u"y + y").substitute({"y": NameNode(pos=None, name="x")})
self.assertEqual("x", T.stats[0].expr.operand1.name)
self.assertEqual("x", T.stats[0].expr.operand2.name)
self.assertTrue(T.stats[0].expr.operand1 is not T.stats[0].expr.operand2)
def test_substitution(self):
F = self.fragment(u"x = 4")
y = NameNode(pos=None, name=u"y")
T = F.substitute({"x" : y})
self.assertCode(u"y = 4", T)
def test_exprstat(self):
F = self.fragment(u"PASS")
pass_stat = PassStatNode(pos=None)
T = F.substitute({"PASS" : pass_stat})
self.assertTrue(isinstance(T.stats[0], PassStatNode), T)
def test_pos_is_transferred(self):
F = self.fragment(u"""
x = y
x = u * v ** w
""")
T = F.substitute({"v" : NameNode(pos=None, name="a")})
v = F.root.stats[1].rhs.operand2.operand1
a = T.stats[1].rhs.operand2.operand1
self.assertEqual(v.pos, a.pos)
def test_temps(self):
TemplateTransform.temp_name_counter = 0
F = self.fragment(u"""
TMP
x = TMP
""")
T = F.substitute(temps=[u"TMP"])
s = T.body.stats
self.assertTrue(isinstance(s[0].expr, TempRefNode))
self.assertTrue(isinstance(s[1].rhs, TempRefNode))
self.assertTrue(s[0].expr.handle is s[1].rhs.handle)
if __name__ == "__main__":
import unittest
unittest.main()
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