first commit

tests/test_routes.py

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+from datetime import date
+
+from fastapi.testclient import TestClient
+
+from app.main import ActivityResult, app
+from app.settings import get_settings
+
+
+def test_activity_svg_returns_svg_content_type(monkeypatch, tmp_path) -> None:
+    monkeypatch.setenv("GITHUB_USERNAME", "octocat")
+    monkeypatch.setenv("GITEA_BASE_URL", "https://gitea.example.com")
+    monkeypatch.setenv("GITEA_USERNAME", "octocat")
+    monkeypatch.setenv("CACHE_DIR", str(tmp_path))
+    get_settings.cache_clear()
+
+    async def fake_collect_merged_activity(settings, cache, options):
+        return ActivityResult(
+            merged={
+                "2026-01-01": {"github": 1, "gitea": 2, "total": 3},
+                "2026-01-02": {"github": 0, "gitea": 0, "total": 0},
+            },
+            stale=False,
+            from_date=date(2026, 1, 1),
+            to_date=date(2026, 1, 2),
+            days_count=2,
+        )
+
+    monkeypatch.setattr("app.main.collect_merged_activity", fake_collect_merged_activity)
+
+    client = TestClient(app)
+    response = client.get("/activity.svg")
+
+    assert response.status_code == 200
+    assert response.headers["content-type"].startswith("image/svg+xml")
+    assert "<svg" in response.text