def test_gini_gain(self):
"""Test gini gain.
Asserts:
gini gain is within acceptable bounds
"""
gini_gain = dt.gini_gain([1, 1, 1, 0, 0, 0], [[1, 1, 0], [1, 0, 0]])
assert 0.056 == round(gini_gain, 3)
def test_gini_gain_max(self):
"""Test maximum gini gain.
Asserts:
gini gain is 0.5.
"""
gini_gain = dt.gini_gain([1, 1, 1, 0, 0, 0], [[1, 1, 1], [0, 0, 0]])
assert .500 == round(gini_gain, 3)
def test_gini_gain_restaurant_patrons(self):
"""Test gini gain using restaurant patrons.
Asserts:
gini gain rounded to 3 decimal places matches as expected.
"""
gain_patrons = dt.gini_gain(self.restaurant['restaurants'],
self.restaurant['split_patrons'])
assert round(gain_patrons, 3) == 0.278
def test_gini_gain_restaurant_type(self):
"""Test gini gain using restaurant food type.
Asserts:
gini gain is 0.
"""
gain_type = round(
dt.gini_gain(self.restaurant['restaurants'],
self.restaurant['split_food_type']), 2)
assert gain_type == 0.00