AppFlowy/frontend/rust-lib/flowy-document/tests/document/document_redo_undo_test.rs

use std::collections::HashMap;

use collab_document::blocks::{Block, BlockAction, BlockActionPayload, BlockActionType};
use collab_document::document_data::{default_document_data, PARAGRAPH_BLOCK_TYPE};

use crate::document::util::{gen_document_id, gen_id, DocumentTest};

#[tokio::test]
async fn undo_redo_test() {
  let test = DocumentTest::new();

  let doc_id: String = gen_document_id();
  let data = default_document_data();

  // create a document
  _ = test
    .create_document(
      test.user_service.user_id().unwrap(),
      &doc_id,
      Some(data.clone()),
    )
    .await;

  // open a document
  let document = test.get_document(&doc_id).await.unwrap();
  let document = document.lock();
  let page_block = document.get_block(&data.page_id).unwrap();
  let page_id = page_block.id;
  let text_block_id = gen_id();

  // insert a text block
  let text_block = Block {
    id: text_block_id.clone(),
    ty: PARAGRAPH_BLOCK_TYPE.to_string(),
    parent: page_id.clone(),
    children: gen_id(),
    external_id: None,
    external_type: None,
    data: HashMap::new(),
  };
  let insert_text_action = BlockAction {
    action: BlockActionType::Insert,
    payload: BlockActionPayload {
      block: Some(text_block),
      parent_id: Some(page_id),
      prev_id: None,
      delta: None,
      text_id: None,
    },
  };
  document.apply_action(vec![insert_text_action]);

  let can_undo = document.can_undo();
  assert!(can_undo);
  // undo the insert
  let undo = document.undo();
  assert!(undo);
  assert_eq!(document.get_block(&text_block_id), None);

  let can_redo = document.can_redo();
  assert!(can_redo);
  // redo the insert
  let redo = document.redo();
  assert!(redo);
}