assertNotNull(body.get("createdTime"));
        assertNotNull(body.get("expiredTime"));
        assertTrue(capturedPath.get().contains("/_doc/node1@host1"));
    }

    @Test
    public void test_tryStartOperation_documentBody() {
        setupMockFessConfig();
        final AtomicReference<String> capturedBody = new AtomicReference<>();
        final AtomicReference<String> capturedPath = new AtomicReference<>();