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import unittest
from Cython.Compiler.Visitor import PrintTree
from Cython.TestUtils import TransformTest
from Cython.Compiler.TreePath import find_first, find_all
from Cython.Compiler import Nodes, ExprNodes
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._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_star(self):
t = self._build_tree()
self.assertEquals(10, len(find_all(t, "//*")))
self.assertEquals(8, len(find_all(t, "//DefNode//*")))
self.assertEquals(0, len(find_all(t, "//NameNode//*")))
def test_node_path_attribute(self):
t = self._build_tree()
self.assertEquals(2, len(find_all(t, "//NameNode/@name")))
self.assertEquals(['fun', 'decorator'], find_all(t, "//NameNode/@name"))
def test_node_path_attribute_dotted(self):
t = self._build_tree()
self.assertEquals(1, len(find_all(t, "//ReturnStatNode/@value.name")))
self.assertEquals(['fun'], find_all(t, "//ReturnStatNode/@value.name"))
def test_node_path_child(self):
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_node_predicate(self):
t = self._build_tree()
self.assertEquals(0, len(find_all(t, "//DefNode[.//ForInStatNode]")))
self.assertEquals(2, len(find_all(t, "//DefNode[.//NameNode]")))
self.assertEquals(1, len(find_all(t, "//ReturnStatNode[./NameNode]")))
self.assertEquals(Nodes.ReturnStatNode,
type(find_first(t, "//ReturnStatNode[./NameNode]")))
def test_node_path_node_predicate_step(self):
t = self._build_tree()
self.assertEquals(2, len(find_all(t, "//DefNode[.//NameNode]")))
self.assertEquals(8, len(find_all(t, "//DefNode[.//NameNode]//*")))
self.assertEquals(1, len(find_all(t, "//DefNode[.//NameNode]//ReturnStatNode")))
self.assertEquals(Nodes.ReturnStatNode,
type(find_first(t, "//DefNode[.//NameNode]//ReturnStatNode")))
def test_node_path_attribute_exists(self):
t = self._build_tree()
self.assertEquals(2, len(find_all(t, "//NameNode[@name]")))
self.assertEquals(ExprNodes.NameNode,
type(find_first(t, "//NameNode[@name]")))
def test_node_path_attribute_exists_not(self):
t = self._build_tree()
self.assertEquals(0, len(find_all(t, "//NameNode[not(@name)]")))
self.assertEquals(2, len(find_all(t, "//NameNode[not(@honking)]")))
def test_node_path_and(self):
t = self._build_tree()
self.assertEquals(1, len(find_all(t, "//DefNode[.//ReturnStatNode and .//NameNode]")))
self.assertEquals(0, len(find_all(t, "//NameNode[@honking and @name]")))
self.assertEquals(0, len(find_all(t, "//NameNode[@name and @honking]")))
self.assertEquals(2, len(find_all(t, "//DefNode[.//NameNode[@name] and @name]")))
def test_node_path_attribute_string_predicate(self):
t = self._build_tree()
self.assertEquals(1, len(find_all(t, "//NameNode[@name = 'decorator']")))
def test_node_path_recursive_predicate(self):
t = self._build_tree()
self.assertEquals(2, len(find_all(t, "//DefNode[.//NameNode[@name]]")))
self.assertEquals(1, len(find_all(t, "//DefNode[.//NameNode[@name = 'decorator']]")))
self.assertEquals(1, len(find_all(t, "//DefNode[.//ReturnStatNode[./NameNode[@name = 'fun']]/NameNode]")))
if __name__ == '__main__':
unittest.main()