def test_compute_centroid():
# ------------------------------------------------------------------------
# tests computed centroid is same as MouseConnApi with 'true' inj density
# pull 'data' from mcc fixture
a = np.random.rand(4, 4, 4)
b = np.random.rand(4, 4, 4)
# compute allensdk centroid
api = MouseConnectivityApi()
mcc_centroid = api.calculate_injection_centroid(a, b, 1)
# 'true' injection density
_compute_true_injection_density(a, b, inplace=True)
assert_array_almost_equal(compute_centroid(a), mcc_centroid)
