test: add test for the dimensions checking

unittest/CMakeLists.txt

@@ -36,3 +36,4 @@ ENDIF()
 ADD_PYTHON_UNIT_TEST("py-matrix" "unittest/python/test_matrix.py" "unittest")
 ADD_PYTHON_UNIT_TEST("py-geometry" "unittest/python/test_geometry.py" "unittest")
 ADD_PYTHON_UNIT_TEST("py-switch" "unittest/python/test_switch.py" "python/eigenpy")
+ADD_PYTHON_UNIT_TEST("py-dimensions" "unittest/python/test_dimensions.py" "python/eigenpy")

unittest/python/test_dimensions.py

+from __future__ import print_function
+
+import eigenpy
+import numpy as np
+
+quat = eigenpy.Quaternion()
+# By default, we convert as numpy.matrix
+coeffs_vector = quat.coeffs() 
+assert len(coeffs_vector.shape) == 2
+
+# Switch to numpy.array
+eigenpy.switchToNumpyArray()
+coeffs_vector = quat.coeffs() 
+assert len(coeffs_vector.shape) == 1