(self)
| 421 | self.assertRaises(TypeError, d.reverse, 1) # Arity is zero |
| 422 | |
| 423 | def test_rotate(self): |
| 424 | s = tuple('abcde') |
| 425 | n = len(s) |
| 426 | |
| 427 | d = deque(s) |
| 428 | d.rotate(1) # verify rot(1) |
| 429 | self.assertEqual(''.join(d), 'eabcd') |
| 430 | |
| 431 | d = deque(s) |
| 432 | d.rotate(-1) # verify rot(-1) |
| 433 | self.assertEqual(''.join(d), 'bcdea') |
| 434 | d.rotate() # check default to 1 |
| 435 | self.assertEqual(tuple(d), s) |
| 436 | |
| 437 | for i in range(n*3): |
| 438 | d = deque(s) |
| 439 | e = deque(d) |
| 440 | d.rotate(i) # check vs. rot(1) n times |
| 441 | for j in range(i): |
| 442 | e.rotate(1) |
| 443 | self.assertEqual(tuple(d), tuple(e)) |
| 444 | d.rotate(-i) # check that it works in reverse |
| 445 | self.assertEqual(tuple(d), s) |
| 446 | e.rotate(n-i) # check that it wraps forward |
| 447 | self.assertEqual(tuple(e), s) |
| 448 | |
| 449 | for i in range(n*3): |
| 450 | d = deque(s) |
| 451 | e = deque(d) |
| 452 | d.rotate(-i) |
| 453 | for j in range(i): |
| 454 | e.rotate(-1) # check vs. rot(-1) n times |
| 455 | self.assertEqual(tuple(d), tuple(e)) |
| 456 | d.rotate(i) # check that it works in reverse |
| 457 | self.assertEqual(tuple(d), s) |
| 458 | e.rotate(i-n) # check that it wraps backaround |
| 459 | self.assertEqual(tuple(e), s) |
| 460 | |
| 461 | d = deque(s) |
| 462 | e = deque(s) |
| 463 | e.rotate(BIG+17) # verify on long series of rotates |
| 464 | dr = d.rotate |
| 465 | for i in range(BIG+17): |
| 466 | dr() |
| 467 | self.assertEqual(tuple(d), tuple(e)) |
| 468 | |
| 469 | self.assertRaises(TypeError, d.rotate, 'x') # Wrong arg type |
| 470 | self.assertRaises(TypeError, d.rotate, 1, 10) # Too many args |
| 471 | |
| 472 | d = deque() |
| 473 | d.rotate() # rotate an empty deque |
| 474 | self.assertEqual(d, deque()) |
| 475 | |
| 476 | def test_len(self): |
| 477 | d = deque('ab') |
nothing calls this directly
no test coverage detected