[Python][Test] add registration test

python/CMakeLists.txt

@@ -10,3 +10,4 @@ ADD_PYTHON_UNIT_TEST("python-sinusoidal" "python/test/test-sinusoidal.py" "pytho
 ADD_PYTHON_UNIT_TEST("python-minjerk" "python/test/test-minjerk.py" "python")
 ADD_PYTHON_UNIT_TEST("python-optimization" "python/test/optimization.py" "python")
 ADD_PYTHON_UNIT_TEST("python-notebook" "python/test/notebook.py" "python")
+ADD_PYTHON_UNIT_TEST("python-registration" "python/test/registration.py" "python")

python/test/registration.py

+import unittest
+
+
+class TestRegistration(unittest.TestCase):
+    """Check registration incompatibilities.
+
+    ref https://github.com/stack-of-tasks/eigenpy/issues/83
+    ref https://gitlab.laas.fr/loco-3d/curves/-/issues/6
+    """
+    def test_pinocchio_then_curves(self):
+        import pinocchio
+        import curves
+        self.assertTrue(hasattr(pinocchio, 'Quaternion'))
+        self.assertTrue(hasattr(curves, 'Quaternion'))
+
+    def test_curves_then_pinocchio(self):
+        import curves
+        import pinocchio
+        self.assertTrue(hasattr(pinocchio, 'Quaternion'))
+        self.assertTrue(hasattr(curves, 'Quaternion'))
+
+
+if __name__ == '__main__':
+    unittest.main()