prevent editing a tracked database in tests

src/commands/edit.rs

@@ -122,9 +122,12 @@ impl<'a> Command<'a> for EditCommand {
 
 #[cfg(test)]
 mod tests {
+    use std::fs;
+
     use pretty_assertions::assert_eq;
     use chrono::{Duration, TimeZone};
     use ansi_term::Color::Yellow;
+    use tempfile::NamedTempFile;
 
     use crate::database::SqliteDatabase;
     use crate::test_utils::Ps;
@@ -349,11 +352,20 @@ mod tests {
         assert_eq!(Ps(&String::from_utf8_lossy(&err)), Ps(""));
     }
 
+    fn copy_db(path: &str) -> NamedTempFile {
+        let tmpfile = NamedTempFile::new().unwrap();
+
+        fs::copy(path, &tmpfile).unwrap();
+
+        tmpfile
+    }
+
     #[test]
     fn warn_old() {
         std::env::set_var("TZ", "UTC");
 
-        let mut db = SqliteDatabase::from_path("assets/test_old_db.db").unwrap();
+        let database_file = copy_db("assets/test_old_db.db");
+        let mut db = SqliteDatabase::from_path(&database_file).unwrap();
         let mut out = Vec::new();
         let mut err = Vec::new();
         let now = Utc.ymd(2021, 8, 3).and_hms(20, 29, 0);
@@ -376,5 +388,8 @@ mod tests {
             String::from_utf8_lossy(&err),
             format!("{} You are using the old timetrap format, it is advised that you update your database using t migrate\n", Yellow.bold().paint("[WARNING]")),
         );
+
+        std::mem::drop(db);
+        std::mem::drop(database_file);
     }
 }