def test_merge():
countmin1 = CountMinSketch(0.1, 0.1)
countmin2 = CountMinSketch(0.1, 0.1)
word = 'hello'
countmin1.increment(word)
countmin2.increment(word)
countmin1.merge(countmin2)
assert countmin2.estimate(word) == 1
assert countmin1.estimate(word) == 2
top_10_list = [('hello', 2.0)]
assert set(countmin1.top_10_dict.items()) == set(top_10_list)
