def test_not_2_views():
with pytest.raises(ValueError):
view1 = np.random.random((10, ))
view2 = np.random.random((10, ))
view3 = np.random.random((10, ))
kmeans = MultiviewKMeans()
kmeans.fit([view1, view2, view3])
def test_predict_no_centroids1():
with pytest.raises(AttributeError):
kmeans = MultiviewKMeans()
kmeans.centroids_ = [None, None]
view1 = np.random.random((10, 11))
view2 = np.random.random((10, 10))
kmeans.predict([view1, view2])
def test_final_centroids_no_consensus():
with pytest.raises(ConvergenceWarning):
kmeans = MultiviewKMeans(random_state=RANDOM_SEED)
view1 = np.array([[0, 1], [1, 0]])
view2 = np.array([[1, 0], [0, 1]])
v1_centroids = np.array([[0, 1], [1, 0]])
v2_centroids = np.array([[0, 1], [1, 0]])
centroids = [v1_centroids, v2_centroids]
kmeans._final_centroids([view1, view2], centroids)
def test_final_centroids_less_than_n_clusters():
with pytest.raises(ConvergenceWarning):
kmeans = MultiviewKMeans(n_clusters=3, random_state=RANDOM_SEED)
view1 = np.random.random((2, 5))
view2 = np.random.random((2, 6))
v1_centroids = np.random.random((3, 5))
v2_centroids = np.random.random((3, 6))
centroids = [v1_centroids, v2_centroids]
kmeans._final_centroids([view1, view2], centroids)
def test_fit_predict_max_iter(data_random):
n_clusters = data_random['n_clusters']
max_iter = 5
kmeans = MultiviewKMeans(n_clusters=n_clusters, max_iter=max_iter)
cluster_pred = kmeans.fit_predict(data_random['test_data'])
assert (data_random['n_test'] == cluster_pred.shape[0])
for cl in cluster_pred:
assert (cl >= 0 and cl < data_random['n_clusters'])
def test_fit_predict_n_init(data_random):
n_clusters = data_random['n_clusters']
n_init = 1
kmeans = MultiviewKMeans(n_clusters=n_clusters, n_init=n_init)
cluster_pred = kmeans.fit_predict(data_random['test_data'])
assert (data_random['n_test'] == cluster_pred.shape[0])
for cl in cluster_pred:
assert (cl >= 0 and cl < data_random['n_clusters'])
def test_fit_predict_patience(data_random):
n_clusters = data_random['n_clusters']
patience = 10
kmeans = MultiviewKMeans(n_clusters=n_clusters, patience=patience)
cluster_pred = kmeans.fit_predict(data_random['test_data'])
assert (data_random['n_test'] == cluster_pred.shape[0])
for cl in cluster_pred:
assert (cl >= 0 and cl < data_random['n_clusters'])
def test_predict_random_small(data_random):
kmeans = MultiviewKMeans()
input_data = [
data_random['fit_data'][0][:2], data_random['fit_data'][1][:2]
]
kmeans.fit(input_data)
cluster_pred = kmeans.predict(data_random['test_data'])
assert (data_random['n_test'] == cluster_pred.shape[0])
for cl in cluster_pred:
assert (cl >= 0 and cl < data_random['n_clusters'])
def data_random():
num_fit_samples = 200
num_test_samples = 5
n_feats1 = 20
n_feats2 = 18
n_clusters = 3
np.random.seed(RANDOM_SEED)
fit_data = []
fit_data.append(np.random.rand(num_fit_samples, n_feats1))
fit_data.append(np.random.rand(num_fit_samples, n_feats2))
test_data = []
test_data.append(np.random.rand(num_test_samples, n_feats1))
test_data.append(np.random.rand(num_test_samples, n_feats2))
kmeans = MultiviewKMeans(n_clusters=n_clusters, random_state=RANDOM_SEED)
return {
'n_test': num_test_samples,
'n_feats1': n_feats1,
'n_feats2': n_feats2,
'n_clusters': n_clusters,
'kmeans': kmeans,
'fit_data': fit_data,
'test_data': test_data
}
def test_predict_deterministic():
n_clusters = 2
v1_centroid = np.array([[0, 0], [1, 1]])
v2_centroid = np.array([[0, 0], [1, 1]])
centroids = [v1_centroid, v2_centroid]
v1_data = np.array([[0, 0], [0.3, 0.2], [0.5, 0.5], [0.7, 0.7], [1, 1]])
v2_data = np.array([[0, 0], [0.2, 0.4], [0.5, 0.5], [0.4, 0.7], [1, 1]])
data = [v1_data, v2_data]
kmeans = MultiviewKMeans(n_clusters=n_clusters)
kmeans.centroids_ = centroids
cluster_pred = kmeans.predict(data)
true_clusters = [0, 0, 0, 1, 1]
for ind in range(len(true_clusters)):
assert cluster_pred[ind] == true_clusters[ind]
def test_predict_no_centroids2():
kmeans = MultiviewKMeans()
with pytest.raises(ConvergenceWarning):
view1 = np.array([[0, 1], [1, 0]])
view2 = np.array([[1, 0], [0, 1]])
v1_centroids = np.array([[0, 1], [1, 0]])
v2_centroids = np.array([[0, 1], [1, 0]])
centroids = [v1_centroids, v2_centroids]
kmeans._final_centroids([view1, view2], centroids)
with pytest.raises(AttributeError):
kmeans.predict([view1, view2])
def test_final_centroids_less_than_n_clusters():
with pytest.raises(ConvergenceWarning):
kmeans = MultiviewKMeans(n_clusters=3, random_state=RANDOM_SEED)
view1 = np.random.random((2, 11))
view2 = np.random.random((2, 10))
kmeans.fit([view1, view2])
def test_n_clusters_not_positive_int():
with pytest.raises(ValueError):
kmeans = MultiviewKMeans(n_clusters=-1)
with pytest.raises(ValueError):
kmeans = MultiviewKMeans(n_clusters=0)
def test_max_iter_not_positive_int():
with pytest.raises(ValueError):
kmeans = MultiviewKMeans(max_iter=-1)
with pytest.raises(ValueError):
kmeans = MultiviewKMeans(max_iter=0)
def test_patience_not_nonnegative_int():
with pytest.raises(ValueError):
kmeans = MultiviewKMeans(patience=-1)
def test_samples_not_2D_2():
with pytest.raises(ValueError):
view1 = np.random.random((10, ))
view2 = np.random.random((10, ))
kmeans = MultiviewKMeans()
kmeans.fit([view1, view2])
def test_samples_not_list():
with pytest.raises(ValueError):
view1 = 1
view2 = 3
kmeans = MultiviewKMeans()
kmeans.fit([view1, view2])
def test_predict_not_fit():
with pytest.raises(NotFittedError):
kmeans = MultiviewKMeans()
view1 = np.random.random((10, 11))
view2 = np.random.random((10, 10))
kmeans.predict([view1, view2])
def test_random_state_not_convertible():
with pytest.raises(ValueError):
kmeans = MultiviewKMeans(random_state='ab')