def test_node_repr(self):
a = dllist([None]).first
self.assertEqual(repr(a), '<dllistnode(None)>')
b = dllist([1, None]).first
self.assertEqual(repr(b), '<dllistnode(1)>')
c = dllist(['abc', None]).first
self.assertEqual(repr(c), '<dllistnode(\'abc\')>')
def test_node_str(self):
a = dllist([None, None]).first
self.assertEqual(str(a), 'dllistnode(None)')
b = dllist([1, None]).first
self.assertEqual(str(b), 'dllistnode(1)')
c = dllist(['abc', None]).first
self.assertEqual(str(c), 'dllistnode(abc)')
def test_guards_after_concat(self):
a = dllist([1, 2])
b = dllist([3, 4])
c = a + b
self.assertIsNot(c.first, None)
self.assertEqual(c.first.value, 1)
self.assertIsNot(c.last, None)
self.assertEqual(c.last.value, 4)
def test_guards_after_concat_inplace(self):
a = dllist([1, 2])
b = dllist([3, 4])
orig_a_first = a.first
a += b
self.assertIs(a.first, orig_a_first)
self.assertEqual(a.first.value, 1)
self.assertIsNot(a.last, None)
self.assertEqual(a.last.value, 4)
def test_concat(self):
a_ref = range(0, 1024, 4)
a = dllist(a_ref)
b_ref = range(8092, 8092 + 1024, 4)
b = dllist(b_ref)
ab_ref = dllist(a_ref + b_ref)
c = a + b
self.assertEqual(c, ab_ref)
self.assertEqual(len(c), len(ab_ref))
c = a + b_ref
self.assertEqual(c, ab_ref)
self.assertEqual(len(c), len(ab_ref))
def test_cmp(self):
a = dllist(xrange(0, 1100))
b = dllist(xrange(0, 1101))
c = range(0, 1100)
self.assertEqual(cmp(a, a), 0)
self.assertEqual(cmp(a, b), -1)
self.assertEqual(cmp(b, a), 1)
self.assertEqual(cmp(a, c), 0)
self.assertEqual(cmp(c, a), 0)
self.assertEqual(cmp([], []), 0)
self.assertEqual(cmp([], a), -1)
self.assertEqual(cmp(a, []), 1)
def test_concat_empty(self):
empty = dllist()
filled_ref = range(0, 1024, 4)
filled = dllist(filled_ref)
res = empty + empty
self.assertEqual(res, dllist([] + []))
self.assertEqual(len(res), 0)
res = empty + filled
self.assertEqual(res, dllist([] + filled_ref))
self.assertEqual(len(res), len(filled_ref))
res = filled + empty
self.assertEqual(res, dllist(filled_ref + []))
self.assertEqual(len(res), len(filled_ref))
def test_appendright(self):
ll = dllist(xrange(4))
ref = dllist([0, 1, 2, 3, 10])
prev = ll.nodeat(-1)
arg_node = dllistnode(10)
new_node = ll.appendright(arg_node)
self.assertNotEqual(new_node, arg_node)
self.assertEqual(new_node.value, 10)
self.assertEqual(new_node.prev, prev)
self.assertEqual(new_node.next, None)
self.assertEqual(prev.next, new_node)
self.assertEqual(ll.last, new_node)
self.assertEqual(ll, ref)
def test_appendleft(self):
ll = dllist(xrange(4))
ref = dllist([10, 0, 1, 2, 3])
next = ll.nodeat(0)
arg_node = dllistnode(10)
new_node = ll.appendleft(arg_node)
self.assertNotEqual(new_node, arg_node)
self.assertEqual(new_node.value, 10)
self.assertEqual(new_node.prev, None)
self.assertEqual(new_node.next, next)
self.assertEqual(next.prev, new_node)
self.assertEqual(ll.first, new_node)
self.assertEqual(ll, ref)
def test_insert_value_after_last(self):
ll = dllist(xrange(4))
ref = dllist([0, 1, 2, 3, 10])
prev = ll.nodeat(3)
arg_node = dllistnode(10)
new_node = ll.insert(arg_node, after=ll.last)
self.assertNotEqual(new_node, arg_node)
self.assertEqual(new_node.value, 10)
self.assertEqual(new_node.prev, prev)
self.assertEqual(new_node.next, None)
self.assertEqual(prev.next, new_node)
self.assertEqual(new_node, ll.last)
self.assertEqual(ll, ref)
def test_insert_value_after(self):
ll = dllist(xrange(4))
ref = dllist([0, 1, 10, 2, 3])
prev = ll.nodeat(1)
next = ll.nodeat(2)
arg_node = dllistnode(10)
new_node = ll.insert(arg_node, after=ll.nodeat(1))
self.assertNotEqual(new_node, arg_node)
self.assertEqual(new_node.value, 10)
self.assertEqual(new_node.prev, prev)
self.assertEqual(new_node.next, next)
self.assertEqual(prev.next, new_node)
self.assertEqual(next.prev, new_node)
self.assertEqual(ll, ref)
def test_node_after_del(self):
ll = dllist([1, 2, 3])
node = ll.nodeat(1)
del ll[1]
self.assertIs(node.prev, None)
self.assertIs(node.next, None)
self.assertIs(node.list, None)
def test_init_empty(self):
ll = dllist()
self.assertEqual(len(ll), 0)
self.assertEqual(ll.size, 0)
self.assertEqual(list(ll), [])
self.assertIs(ll.first, None)
self.assertIs(ll.last, None)
def test_node_after_remove(self):
ll = dllist([1, 2, 3])
node = ll.nodeat(1)
ll.remove(node)
self.assertIs(node.prev, None)
self.assertIs(node.next, None)
self.assertIs(node.list, None)
def test_guards_after_remove(self):
ll = dllist([1, 2])
ll.remove(ll.last)
self.assertIs(ll.first, ll.last)
ll.remove(ll.first)
self.assertIs(ll.first, None)
self.assertIs(ll.last, None)
def test_guards_after_popright(self):
ll = dllist([1, 2])
ll.pop()
self.assertIs(ll.first, ll.last)
self.assertEqual(ll.first.value, 1)
ll.pop()
self.assertIs(ll.first, None)
self.assertIs(ll.last, None)
def test_guards_after_repeat_inplace(self):
ll = dllist([1, 2])
orig_first = ll.first
orig_last = ll.last
ll *= 4
self.assertIs(ll.first, orig_first)
self.assertIsNot(ll.last, None)
self.assertIsNot(ll.last, orig_last)
def test_guards_after_insert(self):
ll = dllist()
node1 = ll.insert(dllistnode(1))
self.assertIs(ll.first, node1)
self.assertIs(ll.last, node1)
node2 = ll.insert(dllistnode(2))
self.assertIs(ll.first, node1)
self.assertIs(ll.last, node2)
def test_guards_after_appendright(self):
ll = dllist()
node1 = ll.appendright(1)
self.assertIs(ll.first, node1)
self.assertIs(ll.last, node1)
node2 = ll.appendright(2)
self.assertIs(ll.first, node1)
self.assertIs(ll.last, node2)
def test_guards_after_del(self):
ll = dllist([1, 2])
orig_last = ll.last
del ll[0]
self.assertIs(ll.first, orig_last)
self.assertIs(ll.last, orig_last)
del ll[0]
self.assertIs(ll.first, None)
self.assertIs(ll.last, None)
def test_reversed(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
idx = len(ref) - 1
for val in reversed(ll):
self.assertFalse(isinstance(val, dllistnode))
self.assertEqual(val, ref[idx])
idx -= 1
self.assertEqual(idx, -1)
def test_iternodes(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
idx = 0
for node in ll.iternodes():
self.assertTrue(isinstance(node, dllistnode))
self.assertEqual(node.value, ref[idx])
idx += 1
self.assertEqual(idx, len(ref))
def test_popleft(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
result = ll.popleft()
self.assertEqual(result, ref[0])
self.assertEqual(len(ll), len(ref) - 1)
self.assertEqual(ll.size, len(ref) - 1)
self.assertEqual(ll.first.value, ref[1])
self.assertEqual(list(ll), ref[1:])
def test_popright(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
result = ll.popright()
self.assertEqual(result, ref[-1])
self.assertEqual(len(ll), len(ref) - 1)
self.assertEqual(ll.size, len(ref) - 1)
self.assertEqual(ll.last.value, ref[-2])
self.assertEqual(list(ll), ref[:-1])
def test_iter(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
idx = 0
for val in ll:
self.assertFalse(isinstance(val, dllistnode))
self.assertEqual(val, ref[idx])
idx += 1
self.assertEqual(idx, len(ref))
def test_guards_after_concat_inplace_of_self(self):
ll = dllist([1, 2])
orig_first = ll.first
orig_last = ll.last
ll += ll
self.assertIs(ll.first, orig_first)
self.assertEqual(ll.first.value, 1)
self.assertIsNot(ll.last, None)
self.assertIsNot(ll.last, orig_last)
self.assertEqual(ll.last.value, 2)
def test_init_with_sequence(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
self.assertEqual(len(ll), len(ref))
self.assertEqual(ll.size, len(ref))
self.assertEqual(list(ll), ref)
self.assertIsNot(ll.first, None)
self.assertEqual(ll.first.value, 0)
self.assertIsNot(ll.last, None)
self.assertEqual(ll.last.value, 1020)
def test_iternodes_to(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
terminator_index = 200
terminator = ll.nodeat(terminator_index)
idx = 0
for node in ll.iternodes(to=terminator):
self.assertTrue(isinstance(node, dllistnode))
self.assertEqual(node.value, ref[idx])
idx += 1
self.assertEqual(node.value, (terminator_index-1)*4)
self.assertEqual(idx, terminator_index)
def test_nodeat(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
for idx in xrange(len(ll)):
self.assertTrue(isinstance(ll.nodeat(idx), dllistnode))
self.assertEqual(ll.nodeat(idx).value, ref[idx])
for idx in xrange(len(ll)):
self.assertTrue(isinstance(ll.nodeat(idx), dllistnode))
self.assertEqual(ll.nodeat(-idx - 1).value, ref[-idx - 1])
self.assertRaises(TypeError, ll.nodeat, None)
self.assertRaises(TypeError, ll.nodeat, 'abc')
self.assertRaises(IndexError, ll.nodeat, len(ref))
self.assertRaises(IndexError, ll.nodeat, -len(ref) - 1)
def test_getitem(self):
ref = range(0, 1024, 4)
ll = dllist(ref)
for idx in xrange(len(ll)):
self.assertFalse(isinstance(ll[idx], dllistnode))
self.assertEqual(ll[idx], ref[idx])
for idx in xrange(len(ll)):
self.assertFalse(isinstance(ll[idx], dllistnode))
self.assertEqual(ll[-idx - 1], ref[-idx - 1])
self.assertRaises(TypeError, ll.__getitem__, None)
self.assertRaises(TypeError, ll.__getitem__, 'abc')
self.assertRaises(IndexError, ll.__getitem__, len(ref))
self.assertRaises(IndexError, ll.__getitem__, -len(ref) - 1)
