def test_nodepath_comparison():
from panda3d.core import NodePath, PandaNode
path = NodePath("node")
# Empty NodePath equals itself
assert NodePath() == NodePath()
assert not (NodePath() != NodePath())
assert not (NodePath() > NodePath())
assert not (NodePath() < NodePath())
assert NodePath().compare_to(NodePath()) == 0
# Empty NodePath does not equal non-empty NodePath
assert NodePath() != path
assert not (NodePath() == path)
assert NodePath().compare_to(path) != 0
assert path != NodePath()
assert not (path == NodePath())
assert path.compare_to(NodePath()) != 0
# Copy of NodePath equals original
path2 = NodePath(path)
assert path == path2
assert path2 == path
assert not (path != path2)
assert not (path2 != path)
assert not (path > path2)
assert not (path < path2)
assert path.compare_to(path2) == 0
assert path2.compare_to(path) == 0
# NodePath pointing to copy of node is not the same
path2 = NodePath(path.node().make_copy())
assert path != path2
assert path2 != path
assert not (path == path2)
assert not (path2 == path)
assert (path2 > path) or (path > path2)
assert (path2 < path) or (path < path2)
assert path.compare_to(path2) != 0
assert path2.compare_to(path) != 0
