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)