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Added New Tests for Learning Algorithms #314

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Merged
norvig merged 1 commit into from
Mar 5, 2017
Merged

Added New Tests for Learning Algorithms #314

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25 changes: 23 additions & 2 deletions tests/test_learning.py
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Original file line number Diff line number Diff line change
@@ -1,9 +1,12 @@
import pytest
from learning import parse_csv, weighted_mode, weighted_replicate
from learning import parse_csv, weighted_mode, weighted_replicate, DataSet, \
PluralityLearner, NaiveBayesLearner, NearestNeighborLearner
from utils import DataFile


def test_parse_csv():
assert parse_csv('1, 2, 3 \n 0, 2, na') == [[1, 2, 3], [0, 2, 'na']]
Iris = DataFile('iris.csv').read()
assert parse_csv(Iris)[0] == [5.1,3.5,1.4,0.2,'setosa']


def test_weighted_mode():
Expand All @@ -12,3 +15,21 @@ def test_weighted_mode():

def test_weighted_replicate():
assert weighted_replicate('ABC', [1, 2, 1], 4) == ['A', 'B', 'B', 'C']

def test_plurality_learner():
zoo = DataSet(name="zoo")

pL = PluralityLearner(zoo)
assert pL([]) == "mammal"

def test_naive_bayes():
iris = DataSet(name="iris")

nB = NaiveBayesLearner(iris)
assert nB([5,3,1,0.1]) == "setosa"

def test_k_nearest_neighbors():
iris = DataSet(name="iris")

kNN = NearestNeighborLearner(iris,k=3)
assert kNN([5,3,1,0.1]) == "setosa"