1 files changed, 46 insertions, 0 deletions
diff --git a/test/test_utils.py b/test/test_utils.py
index 3219fce..e85e5b7 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -71,6 +71,52 @@ def test_dist():
             D[i, j] = np.sum(np.square(x[i, :] - x[j, :]))
 
     D2 = ot.dist(x, x)
+    D3 = ot.dist(x)
 
     # dist shoul return squared euclidean
     assert np.allclose(D, D2)
+    assert np.allclose(D, D3)
+
+
+def test_dist0():
+
+    n = 100
+    M = ot.utils.dist0(n, method='lin_square')
+
+    # dist0 default to linear sampling with quadratic loss
+    assert np.allclose(M[0, -1], (n - 1) * (n - 1))
+
+
+def test_dots():
+
+    n1, n2, n3, n4 = 100, 50, 200, 100
+
+    A = np.random.randn(n1, n2)
+    B = np.random.randn(n2, n3)
+    C = np.random.randn(n3, n4)
+
+    X1 = ot.utils.dots(A, B, C)
+
+    X2 = A.dot(B.dot(C))
+
+    assert np.allclose(X1, X2)
+
+
+def test_clean_zeros():
+
+    n = 100
+    nz = 50
+    nz2 = 20
+    u1 = ot.unif(n)
+    u1[:nz] = 0
+    u1 = u1 / u1.sum()
+    u2 = ot.unif(n)
+    u2[:nz2] = 0
+    u2 = u2 / u2.sum()
+
+    M = ot.utils.dist0(n)
+
+    a, b, M2 = ot.utils.clean_zeros(u1, u2, M)
+
+    assert len(a) == n - nz
+    assert len(b) == n - nz2