Add test to Connection::backup/restore

src/backup.rs

@@ -316,10 +316,28 @@ impl Drop for Backup<'_, '_> {
 
 #[cfg(test)]
 mod test {
-    use super::Backup;
+    use super::{Backup, Progress};
     use crate::{Connection, DatabaseName, Result};
     use std::time::Duration;
 
+    #[test]
+    fn backup_to_path() -> Result<()> {
+        let src = Connection::open_in_memory()?;
+        src.execute_batch("CREATE TABLE foo AS SELECT 42 AS x")?;
+
+        let temp_dir = tempfile::tempdir().unwrap();
+        let path = temp_dir.path().join("test.db3");
+
+        fn progress(_: Progress) {}
+
+        src.backup(DatabaseName::Main, path.as_path(), Some(progress))?;
+
+        let mut dst = Connection::open_in_memory()?;
+        dst.restore(DatabaseName::Main, path, Some(progress))?;
+
+        Ok(())
+    }
+
     #[test]
     fn test_backup() -> Result<()> {
         let src = Connection::open_in_memory()?;