[TESTS] Some tests

AlexandreTests.ipynb

 {
  "metadata": {
   "name": "",
-  "signature": "sha256:6d467c42666e98d7f142756ddaee6715f400591ac3004e45c17d204c2f2d0b58"
+  "signature": "sha256:395704b4d4eb714ff9d76fa24d7fbb0b926e58cb7f734a64d3558232ea342e75"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -20,7 +20,7 @@
      "language": "python",
      "metadata": {},
      "outputs": [],
-     "prompt_number": 27
+     "prompt_number": 1
     },
     {
      "cell_type": "code",
@@ -31,7 +31,7 @@
      "language": "python",
      "metadata": {},
      "outputs": [],
-     "prompt_number": 17
+     "prompt_number": 2
     },
     {
      "cell_type": "code",