Extract rollout into its own crate (#15548)

codex-rs/rollout/src/state_db_tests.rs

@@ -0,0 +1,28 @@
+#![allow(warnings, clippy::all)]
+
+use super::*;
+use crate::list::parse_cursor;
+use chrono::DateTime;
+use chrono::NaiveDateTime;
+use chrono::Timelike;
+use chrono::Utc;
+use pretty_assertions::assert_eq;
+use uuid::Uuid;
+
+#[test]
+fn cursor_to_anchor_normalizes_timestamp_format() {
+    let uuid = Uuid::new_v4();
+    let ts_str = "2026-01-27T12-34-56";
+    let token = format!("{ts_str}|{uuid}");
+    let cursor = parse_cursor(token.as_str()).expect("cursor should parse");
+    let anchor = cursor_to_anchor(Some(&cursor)).expect("anchor should parse");
+
+    let naive =
+        NaiveDateTime::parse_from_str(ts_str, "%Y-%m-%dT%H-%M-%S").expect("ts should parse");
+    let expected_ts = DateTime::<Utc>::from_naive_utc_and_offset(naive, Utc)
+        .with_nanosecond(0)
+        .expect("nanosecond");
+
+    assert_eq!(anchor.id, uuid);
+    assert_eq!(anchor.ts, expected_ts);
+}