def test_correct_calls(self):
"""Test number and order of calls of the kernel function when computing the
polarity, including computation of the diagonal kernel matrix entries."""
X = [0.1, 0.4]
Y = [1, -1]
hist = []
kern.polarity(X, Y, lambda x1, x2: _mock_kernel(x1, x2, hist))
assert hist == [(0.1, 0.1), (0.1, 0.4), (0.4, 0.4)]
def test_correct_calls_normalized(self):
"""Test number and order of calls of the kernel function when computing the
polarity, assuming normalized diagonal kernel matrix entries."""
X = [0.1, 0.4]
Y = [1, -1]
hist = []
kern.polarity(
X, Y, lambda x1, x2: _mock_kernel(x1, x2, hist), assume_normalized_kernel=True
)
assert hist == [(0.1, 0.4)]
def test_polarity_value_other_labels(self):
"""Test value of polarity without class label rescaling (2/2)."""
X = [0.1, 0.4]
Y = [1, 1]
pol = kern.polarity(
X, Y, lambda x1, x2: _mock_kernel(x1, x2, []), rescale_class_labels=False
)
pol_assume = kern.polarity(
X,
Y,
lambda x1, x2: _mock_kernel(x1, x2, []),
assume_normalized_kernel=True,
rescale_class_labels=False,
)
assert pol == 2.4
assert pol == pol_assume