Test self delegate vesting shares (#23)

Author: chiliec

tests/test_exceptions.py

@@ -44,6 +44,11 @@ def test_negative_delegate_vesting_shares(viz):
         viz.delegate_vesting_shares(delegator='alice', delegatee='bob', amount=-10)
 
 
+def test_self_delegate_vesting_shares(viz, default_account):
+    with pytest.raises(UnhandledRPCError, match='delegator != delegatee: You cannot delegate SHARES to yourself'):
+        viz.delegate_vesting_shares(delegator=default_account, delegatee=default_account, amount=10)
+
+
 def test_too_much_beneficiaries(viz, default_account):
     beneficiaries = [{"account": default_account, "weight": 50}] * 256