third_party/cython/src/Cython/Compiler/Tests/TestTreeFragment.py

   1 from Cython.TestUtils import CythonTest
   2 from Cython.Compiler.TreeFragment import *
   3 from Cython.Compiler.Nodes import *
   4 from Cython.Compiler.UtilNodes import *
   5 import Cython.Compiler.Naming as Naming
   6
   7 class TestTreeFragments(CythonTest):
   8
   9     def test_basic(self):
  10         F = self.fragment(u"x = 4")
  11         T = F.copy()
  12         self.assertCode(u"x = 4", T)
  13
  14     def test_copy_is_taken(self):
  15         F = self.fragment(u"if True: x = 4")
  16         T1 = F.root
  17         T2 = F.copy()
  18         self.assertEqual("x", T2.stats[0].if_clauses[0].body.lhs.name)
  19         T2.stats[0].if_clauses[0].body.lhs.name = "other"
  20         self.assertEqual("x", T1.stats[0].if_clauses[0].body.lhs.name)
  21
  22     def test_substitutions_are_copied(self):
  23         T = self.fragment(u"y + y").substitute({"y": NameNode(pos=None, name="x")})
  24         self.assertEqual("x", T.stats[0].expr.operand1.name)
  25         self.assertEqual("x", T.stats[0].expr.operand2.name)
  26         self.assert_(T.stats[0].expr.operand1 is not T.stats[0].expr.operand2)
  27
  28     def test_substitution(self):
  29         F = self.fragment(u"x = 4")
  30         y = NameNode(pos=None, name=u"y")
  31         T = F.substitute({"x" : y})
  32         self.assertCode(u"y = 4", T)
  33
  34     def test_exprstat(self):
  35         F = self.fragment(u"PASS")
  36         pass_stat = PassStatNode(pos=None)
  37         T = F.substitute({"PASS" : pass_stat})
  38         self.assert_(isinstance(T.stats[0], PassStatNode), T)
  39
  40     def test_pos_is_transferred(self):
  41         F = self.fragment(u"""
  42         x = y
  43         x = u * v ** w
  44         """)
  45         T = F.substitute({"v" : NameNode(pos=None, name="a")})
  46         v = F.root.stats[1].rhs.operand2.operand1
  47         a = T.stats[1].rhs.operand2.operand1
  48         self.assertEquals(v.pos, a.pos)
  49
  50     def test_temps(self):
  51         TemplateTransform.temp_name_counter = 0
  52         F = self.fragment(u"""
  53             TMP
  54             x = TMP
  55         """)
  56         T = F.substitute(temps=[u"TMP"])
  57         s = T.body.stats
  58         self.assert_(isinstance(s[0].expr, TempRefNode))
  59         self.assert_(isinstance(s[1].rhs, TempRefNode))
  60         self.assert_(s[0].expr.handle is s[1].rhs.handle)
  61
  62 if __name__ == "__main__":
  63     import unittest
  64     unittest.main()