def test1():
"""tests for small subset"""
from subsets import est_subsets
assert est_subsets([1, 2, 3, 4]) == 15
def test6():
"""tests for empty list"""
from subsets import est_subsets
arr = []
assert est_subsets(arr) == 0
def test5():
"""tests for subset of all repeat members"""
from subsets import est_subsets
arr = [1] * 8
assert est_subsets(arr) == 1
def test4():
"""tests for even larger subset"""
from subsets import est_subsets
arr = ['a', 'z', 'z', 'z', 'b', 'j', 'f', 'k', 'b', 'd', 'j', 'j', 'n', 'm', 'm']
assert est_subsets(arr) == 511
def test3():
"""tests for larger subset with repeat members"""
from subsets import est_subsets
arr = [2, 3, 4, 5, 5, 6, 6, 7, 8, 8]
assert est_subsets(arr) == 127
def test2():
"""tests for small subset with repeat members"""
from subsets import est_subsets
assert est_subsets(['a', 'b', 'c', 'd', 'd']) == 15