Add test for init_glorot.

tests/icosagon/test_weights.py

@@ -0,0 +1,13 @@
+from icosagon.weights import init_glorot
+import torch
+import numpy as np
+
+
+def test_init_glorot_01():
+    torch.random.manual_seed(0)
+    res = init_glorot(10, 20)
+    torch.random.manual_seed(0)
+    rnd = torch.rand((10, 20))
+    init_range = np.sqrt(6.0 / 30)
+    expected = -init_range + 2 * init_range * rnd
+    assert torch.all(res == expected)