test: add time test

src/builtins/time.rs

@@ -24,3 +24,13 @@ fn format_time(time: DateTime<Local>, formatting: &str) -> String {
         _ => time.format("%T").to_string(),
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_time() {
+        assert_eq!(Time.execute(&mut BuiltinConfig::new(), vec![]), Ok(()))
+    }
+}