Add some tests for auto create albums

src/commands/auto_create_albums.rs

@@ -116,3 +116,45 @@ fn extract_album_names(folder_path: PathBuf, separator: String) -> Vec<String> {
 
     components
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn extract_album_names_root() {
+        let folder_path = PathBuf::new();
+        let separator = String::from("//");
+
+        let names = extract_album_names(folder_path, separator);
+
+        assert_eq!(names, vec![] as Vec<String>);
+    }
+
+    #[test]
+    fn extract_album_names_first_level() {
+        let folder_path = PathBuf::from("My holiday photos");
+        let separator = String::from("//");
+
+        let names = extract_album_names(folder_path, separator);
+
+        assert_eq!(names, vec!["My holiday photos"]);
+    }
+
+    #[test]
+    fn extract_album_names_third_level() {
+        let folder_path = PathBuf::from("My holiday photos/Europe/Toulouse");
+        let separator = String::from("//");
+
+        let names = extract_album_names(folder_path, separator);
+
+        assert_eq!(
+            names,
+            vec![
+                "My holiday photos",
+                "My holiday photos//Europe",
+                "My holiday photos//Europe//Toulouse",
+            ]
+        );
+    }
+}