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def count_words(text):
result = {}
for word in text.lower().split():
result[word] += 1
return result
def test_simple():
text = 'one'
res = count_words(text)
assert res['one'] == 1
assert len(res) == 1
def test_count_words():
# Given
text = 'one two Two three THREE three'
# When
res = count_words(text)
# Then
assert res['one'] == 1
assert res['two'] == 2
assert res['three'] == 3
if __name__ == '__main__':
test_count_words()
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