def test_simple():
r = str_range('a', 'c')
assert ''.join(list(r)) == 'abc'
def test_same_start_end():
r = str_range('a', 'a')
assert iter(r) == r
assert ''.join(list(r)) == 'a'
def test_simple_with_negativestep():
r = str_range('c', 'a', -2)
assert ''.join(list(r)) == 'ca'
def test_hebrew():
r = str_range('א', 'ז', 2)
assert ''.join(list(r)) == 'אגהז'
def test_simple_with_step():
r = str_range('a', 'c', 2)
assert ''.join(list(r)) == 'ac'