from Cython.TestUtils import CythonTest from Cython.Compiler.TreeFragment import * from Cython.Compiler.Nodes import * from Cython.Compiler.UtilNodes import * 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()