testsuite: add test for is_valid_type.

src/python/espressomd/utils.pyx

@@ -16,6 +16,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
+import math
 cimport numpy as np
 cimport cython
 import numpy as np
@@ -131,7 +132,7 @@ def to_char_pointer(s):
 
     """
     if isinstance(s, unicode):
-        s = (< unicode > s).encode('utf8')
+        s = ( < unicode > s).encode('utf8')
     return s
 
 
@@ -147,7 +148,7 @@ def to_str(s):
     if isinstance(s, unicode):
         return < unicode > s
     elif isinstance(s, bytes):
-        return (< bytes > s).decode('ascii')
+        return ( < bytes > s).decode('ascii')
     else:
         raise ValueError('Unknown string type {}'.format(type(s)))
 
@@ -284,7 +285,10 @@ def is_valid_type(value, t):
     Extended checks for numpy int and float types.
 
     """
-
+    if value is None:
+        return False
+    if np.isnan(value).any() or np.isinf(value).any():
+        return False
     if t == int:
         return isinstance(value, (int, np.integer, np.long))
     elif t == float:

testsuite/python/CMakeLists.txt

@@ -197,6 +197,7 @@ python_test(FILE time_series.py MAX_NUM_PROC 1)
 python_test(FILE linear_momentum.py)
 python_test(FILE linear_momentum_lb.py MAX_NUM_PROC 2 LABELS gpu)
 python_test(FILE mmm1d.py MAX_NUM_PROC 2 LABELS gpu)
+python_test(FILE utils.py MAX_NUM_PROC 1)
 
 if(PY_H5PY)
   python_test(FILE h5md.py MAX_NUM_PROC 2)

testsuite/python/utils.py

@@ -0,0 +1,20 @@
+import numpy as np
+
+import unittest as ut
+import espressomd.utils
+
+
+class UtilsTest(ut.TestCase):
+
+    def test_is_valid_type(self):
+        self.assertFalse(espressomd.utils.is_valid_type(np.inf, float))
+        self.assertFalse(espressomd.utils.is_valid_type(np.nan, float))
+        self.assertFalse(espressomd.utils.is_valid_type(None, float))
+        self.assertFalse(espressomd.utils.is_valid_type(float('nan'), float))
+        self.assertFalse(espressomd.utils.is_valid_type(float('inf'), float))
+        self.assertFalse(espressomd.utils.is_valid_type(np.inf, int))
+        self.assertFalse(espressomd.utils.is_valid_type(np.nan, int))
+        self.assertFalse(espressomd.utils.is_valid_type(None, int))
+
+if __name__ == "__main__":
+    ut.main()