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# -*- coding: utf-8 -*-
from anytree import LightNodeMixin, LoopError, PostOrderIter, PreOrderIter, TreeError
from anytree.node.util import _repr
from .helper import assert_raises
class LightNode(LightNodeMixin):
__slots__ = ["name"]
def __init__(self, name, parent=None, children=None):
self.name = name
self.parent = parent
if children:
self.children = children
def __repr__(self):
path = self.separator.join([""] + [str(node.name) for node in self.path])
return "%s(%r)" % (self.__class__.__name__, path)
def test_parent_child():
"""A tree parent and child attributes."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1a = LightNode("sub1A", parent=s1)
s1b = LightNode("sub1B", parent=s1)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.parent is None
assert root.children == tuple([s0, s1])
assert s0.parent == root
assert s0.children == tuple([s0b, s0a])
assert s0b.parent == s0
assert s0b.children == tuple()
assert s0a.parent == s0
assert s0a.children == tuple()
assert s1.parent == root
assert s1.children == tuple([s1a, s1b, s1c])
assert s1a.parent == s1
assert s1a.children == tuple()
assert s1b.parent == s1
assert s1b.children == tuple()
assert s1c.parent == s1
assert s1c.children == tuple([s1ca])
assert s1ca.parent == s1c
assert s1ca.children == tuple()
# change parent
s1ca.parent = s0
assert root.parent is None
assert root.children == tuple([s0, s1])
assert s0.parent == root
assert s0.children == tuple([s0b, s0a, s1ca])
assert s0b.parent == s0
assert s0b.children == tuple()
assert s0a.parent == s0
assert s0a.children == tuple()
assert s1.parent == root
assert s1.children == tuple([s1a, s1b, s1c])
assert s1a.parent == s1
assert s1a.children == tuple()
assert s1b.parent == s1
assert s1b.children == tuple()
assert s1c.parent == s1
assert s1c.children == tuple()
assert s1ca.parent == s0
assert s1ca.children == tuple()
# break tree into two
s1.parent = None
assert root.parent is None
assert root.children == tuple([s0])
assert s0.parent == root
assert s0.children == tuple([s0b, s0a, s1ca])
assert s0b.parent == s0
assert s0b.children == tuple()
assert s0a.parent == s0
assert s0a.children == tuple()
assert s1.parent is None
assert s1.children == tuple([s1a, s1b, s1c])
assert s1a.parent == s1
assert s1a.children == tuple()
assert s1b.parent == s1
assert s1b.children == tuple()
assert s1c.parent == s1
assert s1c.children == tuple()
assert s1ca.parent == s0
assert s1ca.children == tuple()
# set to the same
s1b.parent = s1
assert root.parent is None
assert root.children == tuple([s0])
assert s0.parent == root
assert s0.children == tuple([s0b, s0a, s1ca])
assert s0b.parent == s0
assert s0b.children == tuple()
assert s0a.parent == s0
assert s0a.children == tuple()
assert s1.parent is None
assert s1.children == tuple([s1a, s1b, s1c])
assert s1a.parent == s1
assert s1a.children == tuple()
assert s1b.parent == s1
assert s1b.children == tuple()
assert s1c.parent == s1
assert s1c.children == tuple()
assert s1ca.parent == s0
assert s1ca.children == tuple()
def test_detach_children():
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1a = LightNode("sub1A", parent=s1)
s1b = LightNode("sub1B", parent=s1)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.descendants == (s0, s0b, s0a, s1, s1a, s1b, s1c, s1ca)
del s0.children
assert root.descendants == (s0, s1, s1a, s1b, s1c, s1ca)
del s1.children
assert root.descendants == (s0, s1)
def test_children_setter():
root = LightNode("root")
s0 = LightNode("sub0")
s1 = LightNode("sub0A")
s0a = LightNode("sub0B")
root.children = [s0, s1]
s0.children = [s0a]
assert root.descendants == (s0, s0a, s1)
with assert_raises(LoopError, "Cannot set parent. LightNode('/root/sub0') cannot be parent of itself."):
s0.children = [s0]
# test whether tree is unchanged after LoopError
assert root.descendants == (s0, s0a, s1)
with assert_raises(
LoopError, "Cannot set parent. LightNode('/root/sub0') is parent of LightNode('/root/sub0/sub0B')."
):
s0a.children = [s0]
# test whether tree is unchanged after LoopError
assert root.descendants == (s0, s0a, s1)
root.children = [s0, s1]
s0.children = [s0a]
s0a.children = [s1]
assert root.descendants == (s0, s0a, s1)
def test_children_setter_large():
root = LightNode("root")
s0 = LightNode("sub0")
s0b = LightNode("sub0B")
s0a = LightNode("sub0A")
s1 = LightNode("sub1")
s1a = LightNode("sub1A")
s1b = LightNode("sub1B")
s1c = LightNode("sub1C")
s1ca = LightNode("sub1Ca")
root.children = [s0, s1]
assert root.descendants == (s0, s1)
s0.children = [s0a, s0b]
assert root.descendants == (s0, s0a, s0b, s1)
s1.children = [s1a, s1b, s1c]
assert root.descendants == (s0, s0a, s0b, s1, s1a, s1b, s1c)
with assert_raises(TypeError, "'LightNode' object is not iterable"):
s1.children = s1ca
assert root.descendants == (s0, s0a, s0b, s1, s1a, s1b, s1c)
def test_node_children_multiple():
root = LightNode("root")
sub = LightNode("sub")
with assert_raises(TreeError, "Cannot add node LightNode('/sub') multiple times as child."):
root.children = [sub, sub]
def test_recursion_detection():
"""Recursion detection."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
# try recursion
assert root.parent is None
try:
root.parent = root
except LoopError as exc:
assert str(exc) == "Cannot set parent. LightNode('/root') cannot be parent of itself."
assert root.parent is None
else:
assert False
assert root.parent is None
try:
root.parent = s0a
except LoopError as exc:
assert str(exc) == ("Cannot set parent. LightNode('/root') is parent of LightNode('/root/sub0/sub0A').")
assert root.parent is None
else:
assert False
assert s0.parent is root
try:
s0.parent = s0a
except LoopError as exc:
assert str(exc) == ("Cannot set parent. LightNode('/root/sub0') is parent of LightNode('/root/sub0/sub0A').")
assert s0.parent is root
else:
assert False
def test_ancestors():
"""Node.ancestors."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.ancestors == tuple()
assert s0.ancestors == tuple([root])
assert s0b.ancestors == tuple([root, s0])
assert s0a.ancestors == tuple([root, s0])
assert s1ca.ancestors == tuple([root, s1, s1c])
def test_node_children_init():
"""Node With Children Attribute."""
root = LightNode("root", children=[LightNode("a", children=[LightNode("aa")]), LightNode("b")])
assert repr(root.descendants) == "(LightNode('/root/a'), LightNode('/root/a/aa'), LightNode('/root/b'))"
def test_descendants():
"""Node.descendants."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.descendants == tuple([s0, s0b, s0a, s1, s1c, s1ca])
assert s1.descendants == tuple([s1c, s1ca])
assert s1c.descendants == tuple([s1ca])
assert s1ca.descendants == tuple()
def test_root():
"""Node.root."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.root == root
assert s0.root == root
assert s0b.root == root
assert s0a.root == root
assert s1.root == root
assert s1c.root == root
assert s1ca.root == root
def test_siblings():
"""Node.siblings."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.siblings == tuple()
assert s0.siblings == tuple([s1])
assert s0b.siblings == tuple([s0a])
assert s0a.siblings == tuple([s0b])
assert s1.siblings == tuple([s0])
assert s1c.siblings == tuple()
assert s1ca.siblings == tuple()
def test_is_leaf():
"""Node.is_leaf."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.is_leaf is False
assert s0.is_leaf is False
assert s0b.is_leaf is True
assert s0a.is_leaf is True
assert s1.is_leaf is False
assert s1c.is_leaf is False
assert s1ca.is_leaf is True
def test_leaves():
"""Node.leaves."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.leaves == tuple([s0b, s0a, s1ca])
assert s0.leaves == tuple([s0b, s0a])
assert s0b.leaves == tuple([s0b])
assert s0a.leaves == tuple([s0a])
assert s1.leaves == tuple([s1ca])
assert s1c.leaves == tuple([s1ca])
assert s1ca.leaves == tuple([s1ca])
def test_is_root():
"""Node.is_root."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.is_root is True
assert s0.is_root is False
assert s0b.is_root is False
assert s0a.is_root is False
assert s1.is_root is False
assert s1c.is_root is False
assert s1ca.is_root is False
def test_height():
"""Node.height."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.height == 3
assert s0.height == 1
assert s0b.height == 0
assert s0a.height == 0
assert s1.height == 2
assert s1c.height == 1
assert s1ca.height == 0
def test_size():
"""Node.size."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.size == 7
assert s0.size == 3
assert s0b.size == 1
assert s0a.size == 1
assert s1.size == 3
assert s1c.size == 2
assert s1ca.size == 1
def test_size():
"""Node.size."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.size == 7
assert s0.size == 3
assert s0b.size == 1
assert s0a.size == 1
assert s1.size == 3
assert s1c.size == 2
assert s1ca.size == 1
def test_depth():
"""Node.depth."""
root = LightNode("root")
s0 = LightNode("sub0", parent=root)
s0b = LightNode("sub0B", parent=s0)
s0a = LightNode("sub0A", parent=s0)
s1 = LightNode("sub1", parent=root)
s1c = LightNode("sub1C", parent=s1)
s1ca = LightNode("sub1Ca", parent=s1c)
assert root.depth == 0
assert s0.depth == 1
assert s0b.depth == 2
assert s0a.depth == 2
assert s1.depth == 1
assert s1c.depth == 2
assert s1ca.depth == 3
def test_parent():
"""Parent attribute."""
foo = LightNodeMixin()
assert foo.parent is None
def test_pre_order_iter():
"""Pre-Order Iterator."""
f = LightNode("f")
b = LightNode("b", parent=f)
a = LightNode("a", parent=b)
d = LightNode("d", parent=b)
c = LightNode("c", parent=d)
e = LightNode("e", parent=d)
g = LightNode("g", parent=f)
i = LightNode("i", parent=g)
h = LightNode("h", parent=i)
assert [node.name for node in PreOrderIter(f)] == ["f", "b", "a", "d", "c", "e", "g", "i", "h"]
def test_post_order_iter():
"""Post-Order Iterator."""
f = LightNode("f")
b = LightNode("b", parent=f)
a = LightNode("a", parent=b)
d = LightNode("d", parent=b)
c = LightNode("c", parent=d)
e = LightNode("e", parent=d)
g = LightNode("g", parent=f)
i = LightNode("i", parent=g)
h = LightNode("h", parent=i)
assert [node.name for node in PostOrderIter(f)] == ["a", "c", "e", "d", "b", "h", "i", "g", "f"]
def test_hookups():
"""Hookup attributes #29."""
class MyLightNode(LightNode):
def _pre_attach(self, parent):
assert str(self.parent) == "None"
assert self.children == tuple()
assert str(self.path) == "(MyLightNode('/B'),)"
def _post_attach(self, parent):
assert str(self.parent) == "MyLightNode('/A')"
assert self.children == tuple()
assert str(self.path) == "(MyLightNode('/A'), MyLightNode('/A/B'))"
def _pre_detach(self, parent):
assert str(self.parent) == "MyLightNode('/A')"
assert self.children == tuple()
assert str(self.path) == "(MyLightNode('/A'), MyLightNode('/A/B'))"
def _post_detach(self, parent):
assert str(self.parent) == "None"
assert self.children == tuple()
assert str(self.path) == "(MyLightNode('/B'),)"
node_a = MyLightNode("A")
node_b = MyLightNode("B", node_a) # attach B on A
node_b.parent = None # detach B from A
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