simpler test

Cython/Compiler/Tests/TestTreePath.py

@@ -4,53 +4,37 @@ from Cython.TestUtils import TransformTest
 from Cython.Compiler.TreePath import find_first, find_all
 
 class TestTreePath(TransformTest):
+    _tree = None
+
+    def _build_tree(self):
+        if self._tree is None:
+            self._tree = self.run_pipeline([], u"""
+            def decorator(fun):  # DefNode
+                return fun       # ReturnStatNode, NameNode
+            @decorator           # NameNode
+            def decorated():     # DefNode
+                pass
+            """)
+        return self._tree
 
     def test_node_path(self):
-        t = self.run_pipeline([], u"""
-        def decorator(fun):  # DefNode
-            return fun       # ReturnStatNode, NameNode
-        @decorator           # NameNode
-        def decorated():     # DefNode
-            pass
-        """)
-
+        t = self._build_tree()
         self.assertEquals(2, len(find_all(t, "//DefNode")))
         self.assertEquals(2, len(find_all(t, "//NameNode")))
         self.assertEquals(1, len(find_all(t, "//ReturnStatNode")))
         self.assertEquals(1, len(find_all(t, "//DefNode//ReturnStatNode")))
 
     def test_node_path_child(self):
-        t = self.run_pipeline([], u"""
-        def decorator(fun):  # DefNode
-            return fun       # ReturnStatNode, NameNode
-        @decorator           # NameNode
-        def decorated():     # DefNode
-            pass
-        """)
-
+        t = self._build_tree()
         self.assertEquals(1, len(find_all(t, "//DefNode/ReturnStatNode/NameNode")))
         self.assertEquals(1, len(find_all(t, "//ReturnStatNode/NameNode")))
 
     def test_node_path_attribute_exists(self):
-        t = self.run_pipeline([], u"""
-        def decorator(fun):
-            return fun
-        @decorator
-        def decorated():
-            pass
-        """)
-
+        t = self._build_tree()
         self.assertEquals(2, len(find_all(t, "//NameNode[@name]")))
 
     def test_node_path_attribute_string_predicate(self):
-        t = self.run_pipeline([], u"""
-        def decorator(fun):
-            return fun
-        @decorator
-        def decorated():
-            pass
-        """)
-
+        t = self._build_tree()
         self.assertEquals(1, len(find_all(t, "//NameNode[@name = 'decorator']")))
 
 if __name__ == '__main__':