fix(reddit): detect auth status in doctor check (#261)

fix(reddit): detect auth status in doctor check, show recovery paths

tests/test_channels.py

@@ -7,9 +7,9 @@ import subprocess
 from urllib.error import URLError
 
 from agent_reach.channels import get_all_channels, get_channel
+from agent_reach.channels.v2ex import V2EXChannel
 from agent_reach.channels.xiaohongshu import XiaoHongShuChannel
 from agent_reach.channels.xueqiu import XueqiuChannel
-from agent_reach.channels.v2ex import V2EXChannel
 
 
 class TestChannelRegistry:
@@ -223,8 +223,6 @@ class TestV2EXChannel:
             },
         ]
 
-        call_count = {"n": 0}
-
         class FakeResponse:
             def __init__(self, payload):
                 self._payload = payload
@@ -648,6 +646,72 @@ class TestXueqiuChannel:
         assert "agent-reach" not in captured["ua"]
 
 
+class TestRedditChannel:
+    def test_reports_off_when_not_installed(self, monkeypatch):
+        monkeypatch.setattr(shutil, "which", lambda _: None)
+        from agent_reach.channels.reddit import RedditChannel
+        status, msg = RedditChannel().check()
+        assert status == "off"
+        assert "rdt-cli" in msg
+        assert "public-clis/rdt-cli" in msg
+
+    def test_reports_ok_when_authenticated(self, monkeypatch):
+        monkeypatch.setattr(shutil, "which", lambda _: "/usr/local/bin/rdt")
+        fake_output = json.dumps({
+            "ok": True,
+            "schema_version": "1",
+            "data": {"authenticated": True, "username": "testuser", "cookie_count": 1},
+        })
+
+        def fake_run(cmd, **kwargs):
+            return subprocess.CompletedProcess(cmd, 0, fake_output, "")
+
+        monkeypatch.setattr(subprocess, "run", fake_run)
+        from agent_reach.channels.reddit import RedditChannel
+        status, msg = RedditChannel().check()
+        assert status == "ok"
+        assert "testuser" in msg
+
+    def test_reports_warn_when_not_authenticated(self, monkeypatch):
+        monkeypatch.setattr(shutil, "which", lambda _: "/usr/local/bin/rdt")
+        fake_output = json.dumps({
+            "ok": True,
+            "schema_version": "1",
+            "data": {"authenticated": False, "username": None, "cookie_count": 0},
+        })
+
+        def fake_run(cmd, **kwargs):
+            return subprocess.CompletedProcess(cmd, 0, fake_output, "")
+
+        monkeypatch.setattr(subprocess, "run", fake_run)
+        from agent_reach.channels.reddit import RedditChannel
+        status, msg = RedditChannel().check()
+        assert status == "warn"
+        assert "403" in msg
+        assert "rdt login" in msg
+        assert "Cookie-Editor" in msg
+        assert "chromewebstore.google.com" in msg
+
+    def test_reports_warn_when_status_check_fails(self, monkeypatch):
+        monkeypatch.setattr(shutil, "which", lambda _: "/usr/local/bin/rdt")
+
+        def fake_run(cmd, **kwargs):
+            return subprocess.CompletedProcess(cmd, 1, "not valid json{{{", "")
+
+        monkeypatch.setattr(subprocess, "run", fake_run)
+        from agent_reach.channels.reddit import RedditChannel
+        status, msg = RedditChannel().check()
+        assert status == "warn"
+
+    def test_can_handle_reddit_urls(self):
+        from agent_reach.channels.reddit import RedditChannel
+        ch = RedditChannel()
+        assert ch.can_handle("https://www.reddit.com/r/python/comments/abc123/")
+        assert ch.can_handle("https://redd.it/abc123")
+        assert not ch.can_handle("https://github.com/user/repo")
+        assert not ch.can_handle("https://v2ex.com/t/123")
+
+
 class TestXiaoHongShuChannel:
     def test_reports_ok_when_cli_authenticated(self, monkeypatch):
         monkeypatch.setattr(shutil, "which", lambda _: "/usr/local/bin/xhs")