def test_cohesion_2():
"""
Test that the reed-solomon distribution maximizes cohesion and connected
information.
"""
c = cohesion(reed_solomon, k=2)
assert c == pytest.approx(12)
def test_cohesion_3(dist):
"""
Test that k=n-1 is the dual total correlation.
"""
dtc = dual_total_correlation(dist)
c = cohesion(dist, k=3)
assert dtc == pytest.approx(c)
def test_cohesion_1(dist):
"""
Test that k=1 is the total correlation.
"""
tc = total_correlation(dist)
c = cohesion(dist, k=1)
assert tc == pytest.approx(c)