    @Test
    public void shouldReturnNullWhenZNodePathNotExist() throws Exception {

        when(curatorFramework.checkExists().forPath(anyString())).thenReturn(null);
        String zNodeData = zookeeperClientWrapper.readZNodeData("/path1/path2");
        verify(curatorFramework, never()).getData();
        assertNull(zNodeData);
    }