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import copy
import unittest
from django.utils.tree import Node
class NodeTests(unittest.TestCase):
def setUp(self):
self.node1_children = [('a', 1), ('b', 2)]
self.node1 = Node(self.node1_children)
self.node2 = Node()
def test_str(self):
self.assertEqual(str(self.node1), "(DEFAULT: ('a', 1), ('b', 2))")
self.assertEqual(str(self.node2), "(DEFAULT: )")
def test_repr(self):
self.assertEqual(repr(self.node1),
"<Node: (DEFAULT: ('a', 1), ('b', 2))>")
self.assertEqual(repr(self.node2), "<Node: (DEFAULT: )>")
def test_len(self):
self.assertEqual(len(self.node1), 2)
self.assertEqual(len(self.node2), 0)
def test_bool(self):
self.assertTrue(self.node1)
self.assertFalse(self.node2)
def test_contains(self):
self.assertIn(('a', 1), self.node1)
self.assertNotIn(('a', 1), self.node2)
def test_add(self):
# start with the same children of node1 then add an item
node3 = Node(self.node1_children)
node3_added_child = ('c', 3)
# add() returns the added data
self.assertEqual(node3.add(node3_added_child, Node.default),
node3_added_child)
# we added exactly one item, len() should reflect that
self.assertEqual(len(self.node1) + 1, len(node3))
self.assertEqual(str(node3), "(DEFAULT: ('a', 1), ('b', 2), ('c', 3))")
def test_negate(self):
# negated is False by default
self.assertFalse(self.node1.negated)
self.node1.negate()
self.assertTrue(self.node1.negated)
self.node1.negate()
self.assertFalse(self.node1.negated)
def test_deepcopy(self):
node4 = copy.copy(self.node1)
node5 = copy.deepcopy(self.node1)
self.assertIs(self.node1.children, node4.children)
self.assertIsNot(self.node1.children, node5.children)
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