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// // SPDX-License-Identifier: Apache-2.0
// // Copyright (c) 2025 ReifyDB
//
// //! Integration tests for CDC consumer state retrieval functionality
//
// use reifydb_cdc::{CdcCheckpoint, get_all_consumer_states};
// use reifydb_core::{common::CommitVersion, Result, interface::CdcConsumerId};
// use reifydb_engine::test_harness::TestEngine;
//
// #[test]
// fn test_get_all_consumer_states_with_single_consumer() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer1"), CommitVersion(42))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states = get_all_consumer_states(&mut query_txn)?;
//
// assert_eq!(states.len(), 1, "Should return exactly one consumer");
// assert_eq!(states[0].consumer_id.as_ref(), "consumer1");
// assert_eq!(states[0].checkpoint, CommitVersion(42));
// Ok(())
// }
//
// #[test]
// fn test_get_all_consumer_states_with_multiple_consumers() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
//
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer1"), CommitVersion(100))?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer2"), CommitVersion(85))?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer3"), CommitVersion(95))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states = get_all_consumer_states(&mut query_txn)?;
//
// assert_eq!(states.len(), 3, "Should return all three consumers");
//
// // Find each consumer by ID and verify checkpoint
// let consumer1 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer1").unwrap();
// let consumer2 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer2").unwrap();
// let consumer3 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer3").unwrap();
//
// assert_eq!(consumer1.checkpoint, CommitVersion(100));
// assert_eq!(consumer2.checkpoint, CommitVersion(85));
// assert_eq!(consumer3.checkpoint, CommitVersion(95));
// Ok(())
// }
//
// #[test]
// fn test_get_all_consumer_states_returns_all_consumer_ids() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
//
// let mut txn = engine.begin_command()?;
// let consumer_names = vec!["alpha", "beta", "gamma", "delta", "epsilon"];
// for (i, name) in consumer_names.iter().enumerate() {
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new(*name), CommitVersion((i + 1) as u64 * 10))?;
// }
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states = get_all_consumer_states(&mut query_txn)?;
//
// assert_eq!(states.len(), consumer_names.len());
//
// // Verify all consumer IDs are present
// for name in consumer_names {
// assert!(
// states.iter().any(|s| s.consumer_id.as_ref() == name),
// "Consumer '{}' should be in results",
// name
// );
// }
// Ok(())
// }
//
// #[test]
// fn test_get_all_consumer_states_updates_after_checkpoint_change() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
//
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer1"), CommitVersion(50))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states_before = get_all_consumer_states(&mut query_txn)?;
// assert_eq!(states_before.len(), 1);
// assert_eq!(states_before[0].checkpoint, CommitVersion(50));
//
// // Update checkpoint
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer1"), CommitVersion(75))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states_after = get_all_consumer_states(&mut query_txn)?;
// assert_eq!(states_after.len(), 1);
// assert_eq!(states_after[0].checkpoint, CommitVersion(75), "Checkpoint should be updated");
// Ok(())
// }
//
// #[test]
// fn test_get_all_consumer_states_with_new_consumer_added() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
//
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer1"), CommitVersion(500))?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer2"), CommitVersion(510))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states_before = get_all_consumer_states(&mut query_txn)?;
// assert_eq!(states_before.len(), 2);
//
// // Add a new consumer
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("new_consumer"), CommitVersion(100))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states_after = get_all_consumer_states(&mut query_txn)?;
// assert_eq!(states_after.len(), 3, "Should now have three consumers");
//
// let new_consumer = states_after
// .iter()
// .find(|s| s.consumer_id.as_ref() == "new_consumer")
// .expect("New consumer should be present");
// assert_eq!(new_consumer.checkpoint, CommitVersion(100));
// Ok(())
// }
//
// #[test]
// fn test_get_all_consumer_states_with_large_version_numbers() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
//
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer1"), CommitVersion(u64::MAX - 100))?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer2"), CommitVersion(u64::MAX - 200))?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer3"), CommitVersion(u64::MAX - 50))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states = get_all_consumer_states(&mut query_txn)?;
//
// assert_eq!(states.len(), 3);
//
// let consumer1 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer1").unwrap();
// let consumer2 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer2").unwrap();
// let consumer3 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer3").unwrap();
//
// assert_eq!(consumer1.checkpoint, CommitVersion(u64::MAX - 100));
// assert_eq!(consumer2.checkpoint, CommitVersion(u64::MAX - 200));
// assert_eq!(consumer3.checkpoint, CommitVersion(u64::MAX - 50));
// Ok(())
// }
//
// #[test]
// fn test_get_all_consumer_states_with_many_consumers() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
//
// let mut txn = engine.begin_command()?;
// for i in 0..100 {
// let consumer_id = CdcConsumerId::new(&format!("consumer_{}", i));
// let version = CommitVersion(100 + (i * 10));
// CdcCheckpoint::persist(&mut txn, &consumer_id, version)?;
// }
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states = get_all_consumer_states(&mut query_txn)?;
//
// assert_eq!(states.len(), 100, "Should return all 100 consumers");
//
// // Verify a few specific consumers
// let consumer_0 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer_0").unwrap();
// assert_eq!(consumer_0.checkpoint, CommitVersion(100));
//
// let consumer_50 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer_50").unwrap();
// assert_eq!(consumer_50.checkpoint, CommitVersion(100 + 50 * 10));
//
// let consumer_99 = states.iter().find(|s| s.consumer_id.as_ref() == "consumer_99").unwrap();
// assert_eq!(consumer_99.checkpoint, CommitVersion(100 + 99 * 10));
// Ok(())
// }
//
// #[test]
// fn test_get_all_consumer_states_with_consumer_at_version_one() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("consumer1"), CommitVersion(1))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states = get_all_consumer_states(&mut query_txn)?;
//
// assert_eq!(states.len(), 1);
// assert_eq!(states[0].checkpoint, CommitVersion(1), "Should handle version 1");
// Ok(())
// }
//
// #[test]
// fn test_get_all_consumer_states_preserves_order_independence() -> reifydb_type::Result<()> {
// let engine = create_test_engine();
//
// let mut txn = engine.begin_command()?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("zebra"), CommitVersion(10))?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("alpha"), CommitVersion(20))?;
// CdcCheckpoint::persist(&mut txn, &CdcConsumerId::new("middle"), CommitVersion(30))?;
// txn.commit()?;
//
// let mut query_txn = engine.begin_query()?;
// let states = get_all_consumer_states(&mut query_txn)?;
//
// assert_eq!(states.len(), 3);
//
// // Verify all consumers are present regardless of insertion order
// assert!(states.iter().any(|s| s.consumer_id.as_ref() == "zebra" && s.checkpoint == CommitVersion(10)));
// assert!(states.iter().any(|s| s.consumer_id.as_ref() == "alpha" && s.checkpoint == CommitVersion(20)));
// assert!(states.iter().any(|s| s.consumer_id.as_ref() == "middle" && s.checkpoint == CommitVersion(30)));
// Ok(())
// }