def test_cross_entropy_3(args):
"""
Test that when p has outcomes that q doesn't have, that we raise an exception.
"""
first, second, rvs, crvs = args
with pytest.raises(ditException):
cross_entropy(first, second, rvs, crvs)
def test_cross_entropy_3(args):
"""
Test that when p has outcomes that q doesn't have, that we raise an exception.
"""
first, second, rvs, crvs = args
with pytest.raises(ditException):
cross_entropy(first, second, rvs, crvs)
def test_cross_entropy_2():
"""
Test that xH(d, d) = H(d).
"""
ds = get_dists()
for d in ds:
yield assert_almost_equal, cross_entropy(d, d), entropy(d)
def test_cross_entropy_2():
"""
Test that xH(d, d) = H(d).
"""
ds = get_dists()
for d in ds:
yield assert_almost_equal, cross_entropy(d, d), entropy(d)
def test_cross_entropy_1():
"""
Test against several known values.
"""
d1, d2, d3, d4, d5 = get_dists()
tests = [([d1, d3], 1.5849625007211563), ([d1, d4], 1.0294468445267841),
([d1, d3, [0]], 1.5849625007211563),
([d1, d4, [0]], 1.0294468445267841), ([d4, d1, [0]], 1),
([d4, d5], 1), ([d5, d4], 1.0294468445267841),
([d4, d5, [0], [1]], 0), ([d4, d5, [1], [0]], 0),
([d1, d2], np.inf), ([d2, d1], np.inf), ([d3, d1], np.inf)]
for args, val in tests:
yield assert_almost_equal, cross_entropy(*args), val
def test_cross_entropy_1():
"""
Test against several known values.
"""
d1, d2, d3, d4, d5 = get_dists()
tests = [([d1, d3], 1.5849625007211563),
([d1, d4], 1.0294468445267841),
([d1, d3, [0]], 1.5849625007211563),
([d1, d4, [0]], 1.0294468445267841),
([d4, d1, [0]], 1),
([d4, d5], 1),
([d5, d4], 1.0294468445267841),
([d4, d5, [0], [1]], 0),
([d4, d5, [1], [0]], 0),
([d1, d2], np.inf),
([d2, d1], np.inf),
([d3, d1], np.inf)]
for args, val in tests:
yield assert_almost_equal, cross_entropy(*args), val
def test_cross_entropy_2(d):
"""
Test that xH(d, d) = H(d).
"""
assert cross_entropy(d, d) == pytest.approx(entropy(d))
def test_cross_entropy_1(args, expected):
"""
Test against several known values.
"""
assert cross_entropy(*args) == pytest.approx(expected)
def test_cross_entropy_2(d):
"""
Test that xH(d, d) = H(d).
"""
assert cross_entropy(d, d) == pytest.approx(entropy(d))
def test_cross_entropy_1(args, expected):
"""
Test against several known values.
"""
assert cross_entropy(*args) == pytest.approx(expected)