def test_contains(self):
values = [1,2,3]
t = IonTag('foo',3,'int', self.mesh)
for v in vertices(self.mesh):
# testing setter
t[v] = values
v = MeshEntity(self.mesh,0,1)
# testing getter
self.assertTrue((t[v] == values).all())
#---------------------------------------------------------------------------------------
# Delete a tag entry (for an entity)
#---------------------------------------------------------------------------------------
# choose an entity to delete
entity_tuple = (v.dim(),v.index())
# check that tag has the entity, v, in it
self.assertTrue(t.__contains__(entity_tuple))
del t._entity_values[entity_tuple]
# check that the tag no longer has the entity, v, in it
self.assertFalse(t.__contains__(entity_tuple))
