update:添加分页、成员添加优化

backend/tests/test_platform_pagination.py

@@ -0,0 +1,57 @@
+"""Unit tests for platform cursor pagination helpers."""
+
+from __future__ import annotations
+
+import datetime
+
+import pytest
+from fastapi import HTTPException
+
+from backend.api.platform._pagination import (
+    decode_cursor,
+    encode_cursor,
+    page_meta,
+)
+
+
+def test_encode_decode_roundtrip() -> None:
+    created_at = datetime.datetime(2026, 3, 15, 12, 30, 45, 123000)
+    row_id = "01HXY9C5B8N3K4P7Q6RT2V0J8D"
+    cursor = encode_cursor(created_at, row_id)
+    decoded_ts, decoded_id = decode_cursor(cursor)
+    assert decoded_ts == created_at
+    assert decoded_id == row_id
+
+
+def test_decode_strips_timezone() -> None:
+    created_at = datetime.datetime(2026, 1, 1, 0, 0, 0, tzinfo=datetime.timezone.utc)
+    cursor = encode_cursor(created_at, "abc")
+    decoded_ts, decoded_id = decode_cursor(cursor)
+    assert decoded_ts.tzinfo is None
+    assert decoded_id == "abc"
+
+
+def test_decode_invalid_cursor_raises_400() -> None:
+    with pytest.raises(HTTPException) as exc_info:
+        decode_cursor("not-a-valid-cursor!!!")
+    assert exc_info.value.status_code == 400
+
+
+def test_page_meta_has_more() -> None:
+    meta = page_meta(
+        limit=10,
+        page_count=10,
+        total_count=25,
+        next_cursor="abc",
+    )
+    assert meta["has_more"] is True
+    assert meta["next_cursor"] == "abc"
+    assert meta["total_count"] == 25
+
+    meta_end = page_meta(
+        limit=10,
+        page_count=5,
+        total_count=25,
+        next_cursor=None,
+    )
+    assert meta_end["has_more"] is False