add tests for utils

Author: rflamary

test/test_utils.py

@@ -0,0 +1,76 @@
+
+
+import ot
+import numpy as np
+
+# import pytest
+
+
+def test_parmap():
+
+    n = 100
+
+    def f(i):
+        return 1.0 * i * i
+
+    a = np.arange(n)
+
+    l1 = map(f, a)
+
+    l2 = ot.utils.parmap(f, a)
+
+    assert np.allclose(l1, l2)
+
+
+def test_tic_toc():
+
+    import time
+
+    ot.tic()
+    time.sleep(0.5)
+    t = ot.toc()
+    t2 = ot.toq()
+
+    # test timing
+    assert np.allclose(0.5, t, rtol=1e-2, atol=1e-2)
+
+    # test toc vs toq
+    assert np.allclose(t, t2, rtol=1e-2, atol=1e-2)
+
+
+def test_kernel():
+
+    n = 100
+
+    x = np.random.randn(n, 2)
+
+    K = ot.utils.kernel(x, x)
+
+    # gaussian kernel  has ones on the diagonal
+    assert np.allclose(np.diag(K), np.ones(n))
+
+
+def test_unif():
+
+    n = 100
+
+    u = ot.unif(n)
+
+    assert np.allclose(1, np.sum(u))
+
+
+def test_dist():
+
+    n = 100
+
+    x = np.random.randn(n, 2)
+
+    D = np.zeros((n, n))
+    for i in range(n):
+        for j in range(n):
+            D[i, j] = np.sum(np.square(x[i, :] - x[j, :]))
+
+    D2 = ot.dist(x, x)
+
+    # dist shoul return squared euclidean
+    assert np.allclose(D, D2)