def test_nth_variation():
a, b = create_cases()
assert (close(nth_variation(a, b, 0), 178)
and close(nth_variation(a, b, 1), 1.80865306195869)
and close(nth_variation(a, b, 2), 0.02414940510773)
and close(nth_variation(a, b, 3), 0.00036023819549)
and close(nth_variation(a, b, 4), 5.71352726e-06))
def test_minkowsky():
a, b = create_cases()
try:
minkowsky(a, b, 0)
assert False
except ValueError:
assert True
assert close(minkowsky(a, b, 1), 1.80865306195869) and close(
minkowsky(a, b, 2), 0.15540078863291) and close(
minkowsky(a, b, 3), 0.07115355218523) and close(
minkowsky(a, b, 4), 0.04889067980003)
def test_symmetry():
errors = []
a, b = create_cases()
for distance_name, distance in [("squared_variation", squared_variation),
("euclidean", euclidean),
("jensen_shannon", jensen_shannon),
("bhattacharyya", bhattacharyya),
("total_variation", total_variation),
("hellinger", hellinger),
("canberra", canberra),
("chebyshev", chebyshev),
("cosine", cosine), ("hamming", hamming),
("mae", mae), ("manhattan", manhattan),
("mse", mse), ("pearson", pearson)]:
# replace assertions by conditions
if not close(distance(a, b), distance(b, a)):
errors.append("Metric '%s' is not symmetric" % distance_name)
# assert no error message has been registered, else print messages
assert not errors, "errors occured:\n{}".format("\n".join(errors))
def test_normal_total_variation():
a, b = create_cases()
assert close(normal_total_variation(a, b), 0.90432653097935)
def test_cosine():
a, b = create_cases()
assert close(cosine(a, b), 0.88709336978023)
def test_hellinger():
a, b = create_cases()
assert close(hellinger(a, b), 0.9361741043264331)
def test_mae():
a, b = create_cases()
assert close(mae(a, b), 0.01016097225819)
def test_hamming():
a, b = create_cases()
assert hamming(a, b) == 167
def test_jensen_shannon():
a, b = create_cases()
assert close(jensen_shannon(a, b), 0.6098897698032)
def test_squared_variation():
a, b = create_cases()
assert close(squared_variation(a, b), 0.02414940510773)
def test_kullback_leibler():
a, b = create_cases()
assert close(kullback_leibler(a, b), 0) and close(kullback_leibler(b, a),
0.01247704999657)
def test_manhattan():
a, b = create_cases()
assert close(manhattan(a, b), 1.80865306195869)
def test_euclidean():
a, b = create_cases()
assert close(euclidean(a, b), 0.15540078863291)
def test_pearson():
a, b = create_cases()
assert close(pearson(a, b), 0.89895209792992)
def test_bhattacharyya():
a, b = create_cases()
assert close(bhattacharyya(a, b), 2.09088236794973)
def test_total_variation():
a, b = create_cases()
assert close(total_variation(a, b), 1.80865306195869)
def test_mse():
a, b = create_cases()
assert close(mse(a, b), 0.00013567081521)
def test_chebyshev():
a, b = create_cases()
assert close(chebyshev(a, b), 0.02015304120034)
def test_canberra():
a, b = create_cases()
assert close(canberra(a, b), 170.27780598478526)