loro-internal 1.12.0

Loro internal library. Do not use it directly as it's not stable.
Documentation 
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use loro_internal::{LoroDoc, TreeParentId};

#[test]
fn tree_index() {
    let doc = LoroDoc::new_auto_commit();
    doc.set_peer_id(0).unwrap();
    let tree = doc.get_tree("tree");
    let root = tree.create(TreeParentId::Root).unwrap();
    let child = tree.create(root.into()).unwrap();
    let child2 = tree.create_at(root.into(), 0).unwrap();
    // sort with OpID
    assert_eq!(tree.get_index_by_tree_id(&child).unwrap(), 1);
    assert_eq!(tree.get_index_by_tree_id(&child2).unwrap(), 0);

    let doc = LoroDoc::new_auto_commit();
    doc.set_peer_id(0).unwrap();
    let tree = doc.get_tree("tree");
    tree.enable_fractional_index(0);
    let root = tree.create(TreeParentId::Root).unwrap();
    let child = tree.create(root.into()).unwrap();
    let child2 = tree.create_at(root.into(), 0).unwrap();
    // sort with fractional index
    assert_eq!(tree.get_index_by_tree_id(&child).unwrap(), 1);
    assert_eq!(tree.get_index_by_tree_id(&child2).unwrap(), 0);
}

#[test]
fn tree_move_in_parent() {
    let doc = LoroDoc::new_auto_commit();
    doc.set_peer_id(0).unwrap();
    let tree = doc.get_tree("tree");
    let root = tree.create(TreeParentId::Root).unwrap();
    let child = tree.create(root.into()).unwrap();
    tree.mov(child, root.into()).unwrap();
}