test: add regression tests for _resolve_mentions

7 tests covering: single mention, dual IDs, no-id skip, multiple mentions,
no mentions, empty text, and key-not-in-text edge case.

Made-with: Cursor

tests/channels/test_feishu_mentions.py

@@ -0,0 +1,59 @@
+"""Tests for FeishuChannel._resolve_mentions."""
+
+from types import SimpleNamespace
+
+from nanobot.channels.feishu import FeishuChannel
+
+
+def _mention(key: str, name: str, open_id: str = "", user_id: str = ""):
+    """Build a mock MentionEvent-like object."""
+    id_obj = SimpleNamespace(open_id=open_id, user_id=user_id) if (open_id or user_id) else None
+    return SimpleNamespace(key=key, name=name, id=id_obj)
+
+
+class TestResolveMentions:
+    def test_single_mention_replaced(self):
+        text = "hello @_user_1 how are you"
+        mentions = [_mention("@_user_1", "Alice", open_id="ou_abc123")]
+        result = FeishuChannel._resolve_mentions(text, mentions)
+        assert "@Alice (ou_abc123)" in result
+        assert "@_user_1" not in result
+
+    def test_mention_with_both_ids(self):
+        text = "@_user_1 said hi"
+        mentions = [_mention("@_user_1", "Bob", open_id="ou_abc", user_id="uid_456")]
+        result = FeishuChannel._resolve_mentions(text, mentions)
+        assert "@Bob (ou_abc, user id: uid_456)" in result
+
+    def test_mention_no_id_skipped(self):
+        """When mention has no id object, the placeholder is left unchanged."""
+        text = "@_user_1 said hi"
+        mentions = [SimpleNamespace(key="@_user_1", name="Charlie", id=None)]
+        result = FeishuChannel._resolve_mentions(text, mentions)
+        assert result == "@_user_1 said hi"
+
+    def test_multiple_mentions(self):
+        text = "@_user_1 and @_user_2 are here"
+        mentions = [
+            _mention("@_user_1", "Alice", open_id="ou_a"),
+            _mention("@_user_2", "Bob", open_id="ou_b"),
+        ]
+        result = FeishuChannel._resolve_mentions(text, mentions)
+        assert "@Alice (ou_a)" in result
+        assert "@Bob (ou_b)" in result
+        assert "@_user_1" not in result
+        assert "@_user_2" not in result
+
+    def test_no_mentions_returns_text(self):
+        assert FeishuChannel._resolve_mentions("hello world", None) == "hello world"
+        assert FeishuChannel._resolve_mentions("hello world", []) == "hello world"
+
+    def test_empty_text_returns_empty(self):
+        mentions = [_mention("@_user_1", "Alice", open_id="ou_a")]
+        assert FeishuChannel._resolve_mentions("", mentions) == ""
+
+    def test_mention_key_not_in_text_skipped(self):
+        text = "hello world"
+        mentions = [_mention("@_user_99", "Ghost", open_id="ou_ghost")]
+        result = FeishuChannel._resolve_mentions(text, mentions)
+        assert result == "hello world"