feat(fc3c): PatreonResolver — vanity → campaign_id via requests

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_patreon_resolver.py

@@ -0,0 +1,88 @@
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from backend.app.services.patreon_resolver import resolve_campaign_id
+
+
+@pytest.mark.asyncio
+async def test_resolves_on_happy_path():
+    fake_response = MagicMock()
+    fake_response.status_code = 200
+    fake_response.json.return_value = {"data": [{"id": "12345678", "type": "campaign"}]}
+    with patch("backend.app.services.patreon_resolver.requests.get", return_value=fake_response):
+        result = await resolve_campaign_id("alice", cookies_path=None)
+    assert result == "12345678"
+
+
+@pytest.mark.asyncio
+async def test_returns_none_on_401():
+    fake_response = MagicMock()
+    fake_response.status_code = 401
+    fake_response.json.return_value = {}
+    with patch("backend.app.services.patreon_resolver.requests.get", return_value=fake_response):
+        result = await resolve_campaign_id("alice", cookies_path=None)
+    assert result is None
+
+
+@pytest.mark.asyncio
+async def test_returns_none_on_network_error():
+    import requests
+    with patch(
+        "backend.app.services.patreon_resolver.requests.get",
+        side_effect=requests.ConnectionError("nope"),
+    ):
+        result = await resolve_campaign_id("alice", cookies_path=None)
+    assert result is None
+
+
+@pytest.mark.asyncio
+async def test_returns_none_on_empty_data():
+    fake_response = MagicMock()
+    fake_response.status_code = 200
+    fake_response.json.return_value = {"data": []}
+    with patch("backend.app.services.patreon_resolver.requests.get", return_value=fake_response):
+        result = await resolve_campaign_id("alice", cookies_path=None)
+    assert result is None
+
+
+@pytest.mark.asyncio
+async def test_returns_none_on_malformed_json():
+    fake_response = MagicMock()
+    fake_response.status_code = 200
+    fake_response.json.side_effect = ValueError("not json")
+    with patch("backend.app.services.patreon_resolver.requests.get", return_value=fake_response):
+        result = await resolve_campaign_id("alice", cookies_path=None)
+    assert result is None
+
+
+@pytest.mark.asyncio
+async def test_missing_cookies_file_does_not_raise(tmp_path):
+    fake_response = MagicMock()
+    fake_response.status_code = 200
+    fake_response.json.return_value = {"data": [{"id": "1", "type": "campaign"}]}
+    with patch("backend.app.services.patreon_resolver.requests.get", return_value=fake_response):
+        result = await resolve_campaign_id(
+            "alice", cookies_path=str(tmp_path / "does-not-exist.txt")
+        )
+    assert result == "1"
+
+
+@pytest.mark.asyncio
+async def test_loads_cookies_file_when_present(tmp_path):
+    cookies = tmp_path / "cookies.txt"
+    cookies.write_text(
+        "# Netscape HTTP Cookie File\n"
+        ".patreon.com\tTRUE\t/\tTRUE\t1700000000\tsession_id\tabc\n"
+    )
+    fake_response = MagicMock()
+    fake_response.status_code = 200
+    fake_response.json.return_value = {"data": [{"id": "9", "type": "campaign"}]}
+    with patch(
+        "backend.app.services.patreon_resolver.requests.get",
+        return_value=fake_response,
+    ) as mock_get:
+        result = await resolve_campaign_id("alice", cookies_path=str(cookies))
+    assert result == "9"
+    _, kwargs = mock_get.call_args
+    assert kwargs.get("cookies") is not None