final CoordinatorHelper helper =
                createCapturingHelper("node1@host1", capturedPath, capturedBody, createMockResponse(200, "{\"deleted\":0}"));

        helper.cleanupExpiredDocuments();

        assertNotNull(capturedBody.get());
        assertTrue(capturedBody.get().contains("\"lt\""));
        assertTrue(capturedBody.get().contains("\"expiredTime\""));