| # lists |
| |
| assert_eq(reversed([]), []) |
| assert_eq(reversed('a'.elems()), ['a']) |
| assert_eq(reversed('abc'.elems()), ['c', 'b', 'a']) |
| assert_eq(reversed('__test '.elems()), [' ', ' ', 't', 's', 'e', 't', '_', '_']) |
| assert_eq(reversed('bbb'.elems()), ['b', 'b', 'b']) |
| |
| --- |
| reversed(None) ### got .* 'NoneType', want 'sequence' |
| --- |
| reversed(1) ### got .* 'int', want 'sequence' |
| --- |
| reversed({1: 3}) ### got .* 'dict', want 'sequence' |
| --- |
| |
| x = ['a', 'b'] |
| y = reversed(x) |
| y.append('c') |
| assert_eq(y, ['b', 'a', 'c']) |
| assert_eq(x, ['a', 'b']) |
| |
| def reverse_equivalence(inp): |
| assert_eq(reversed(inp), inp[::-1]) |
| assert_eq(reversed(reversed(inp)), inp) |
| |
| reverse_equivalence([]) |
| reverse_equivalence([1]) |
| reverse_equivalence(["a", "b"]) |
