# lists

assert_eq(reversed(''), [])
assert_eq(reversed('a'), ['a'])
assert_eq(reversed('abc'), ['c', 'b', 'a'])
assert_eq(reversed('__test  '), [' ', ' ', 't', 's', 'e', 't', '_', '_'])
assert_eq(reversed('bbb'), ['b', 'b', 'b'])

---
reversed(None) ### type 'NoneType' is not iterable
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reversed(1) ### type 'int' is not iterable
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reversed({1: 3}) ### Argument to reversed() must be a sequence, not a dictionary
---

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"])