Add roundtrip test for apkg (stub)

rslib/src/import_export/package/apkg/mod.rs

@@ -3,5 +3,6 @@
 
 mod export;
 mod import;
+mod tests;
 
 pub(crate) use import::NoteMeta;

rslib/src/import_export/package/apkg/tests.rs

@@ -0,0 +1,52 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
+#![cfg(test)]
+
+use std::path::Path;
+
+use tempfile::tempdir;
+
+use crate::{collection::CollectionBuilder, media::MediaManager, prelude::*, search::SearchNode};
+
+fn collection_with_media(dir: &Path, name: &str) -> Result<Collection> {
+    let name = format!("{name}_src");
+    let media_folder = dir.join(format!("{name}.media"));
+    std::fs::create_dir(&media_folder)?;
+    // add collection with sentinel note
+    let mut col = CollectionBuilder::new(dir.join(format!("{name}.anki2")))
+        .set_media_paths(media_folder, dir.join(format!("{name}.mdb")))
+        .build()?;
+    let nt = col.get_notetype_by_name("Basic")?.unwrap();
+    let mut note = nt.new_note();
+    col.add_note(&mut note, DeckId(1))?;
+    // add sample media
+    let mgr = MediaManager::new(&col.media_folder, &col.media_db)?;
+    let mut ctx = mgr.dbctx();
+    mgr.add_file(&mut ctx, "1", b"1")?;
+    mgr.add_file(&mut ctx, "2", b"2")?;
+    mgr.add_file(&mut ctx, "3", b"3")?;
+    Ok(col)
+}
+
+#[test]
+fn roundtrip() -> Result<()> {
+    let _dir = tempdir()?;
+    let dir = _dir.path();
+    const NAME: &str = "mycol";
+
+    let mut col = collection_with_media(dir, NAME)?;
+    let apkg_path = dir.join(format!("{NAME}.apkg"));
+
+    col.export_apkg(
+        &apkg_path,
+        SearchNode::WholeCollection,
+        true,
+        true,
+        None,
+        |_| (),
+    )?;
+    col.import_apkg(&apkg_path)?;
+
+    Ok(())
+}