verify(mockRpc).register(any(WitnessRegisterRequest.class));
        verify(mockRpc).unregister(any(WitnessUnregisterRequest.class));

        client.close();
    }

    @Test
    void testGetWitnessServer() throws Exception {
        WitnessRpcClient mockRpc = mock(WitnessRpcClient.class);
        TestWitnessClient client = new TestWitnessClient(witnessServer, mockContext, mockRpc);