def test_stringy():
assert stringy(3) == '101'
assert stringy(5) == '10101'
assert stringy(12) == '101010101010'
assert stringy(26) == '10101010101010101010101010'
assert stringy(28) == '1010101010101010101010101010'
def test_length():
for i in xrange(1, 5):
assert len(stringy(i)) == i
def test_string():
assert str(type(stringy(5)))[1:-1] == "type 'str'"
def test_start_with_1():
assert stringy(10)[0] == '1'
def test_output():
assert stringy(1) == '1'
assert stringy(2) == '10'
assert stringy(5) == '10101'
assert stringy(10) == '1010101010'
assert stringy(13) == '1010101010101'
