when(mockClient.prepareSearch(any(String[].class))).thenReturn(mockBuilder);
        when(mockBuilder.setPreference(any(String.class))).thenReturn(mockBuilder);

        fesenClient.setSearchPreference("_local");

        final SearchRequestBuilder result1 = fesenClient.prepareSearch("index1");
        final SearchRequestBuilder result2 = fesenClient.prepareStreamSearch("index1");