From f8d61a20759f3833484674173ccb9264d474b6c2 Mon Sep 17 00:00:00 2001
From: Tyler Hoang <tyler@tylerhoang.xyz>
Date: Sun, 14 Jun 2026 02:36:26 -0700
Subject: test: add filings backend tests

---
 backend/tests/test_api.py | 116 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)

(limited to 'backend')

diff --git a/backend/tests/test_api.py b/backend/tests/test_api.py
index 230182e..d898ee2 100644
--- a/backend/tests/test_api.py
+++ b/backend/tests/test_api.py
@@ -22,6 +22,8 @@ def clear_service_caches() -> None:
     data_service.HIST_RATIOS_CACHE.clear()
     data_service.RATIOS_ENDPOINT_CACHE.clear()
     data_service.SECTOR_BENCHMARK_CACHE.clear()
+    data_service.INSIDERS_CACHE.clear()
+    data_service.FILINGS_CACHE.clear()
 
 
 def quarterly_frame(rows: dict[str, list[float]]) -> pd.DataFrame:
@@ -1310,3 +1312,117 @@ def test_ticker_ratios_route(monkeypatch) -> None:
     assert result["pe_ttm"]["value"] == pytest.approx(24.3)
     assert result["gross_margin"]["spark"] == []
     assert result["dividend_yield"]["vs_sector"] is None
+
+
+# ── Filings ───────────────────────────────────────────────────────────────────
+
+_MOCK_YF_FILINGS = [
+    {
+        "date": "2024-10-31",
+        "type": "10-K",
+        "title": "Annual report",
+        "edgarUrl": "https://www.sec.gov/Archives/10k.htm",
+        "exhibits": {"10-K": "https://www.sec.gov/Archives/10k.htm"},
+    },
+    {
+        "date": "2024-07-31",
+        "type": "10-Q",
+        "title": "Quarterly report",
+        "edgarUrl": "https://www.sec.gov/Archives/10q.htm",
+        "exhibits": {},
+    },
+    {
+        "date": "2024-06-15",
+        "type": "8-K",
+        "title": "Material event disclosure",
+        "edgarUrl": "https://www.sec.gov/Archives/8k.htm",
+        "exhibits": {},
+    },
+    {
+        "date": "2024-05-01",
+        "type": "10-Q",
+        "title": "Quarterly report",
+        "edgarUrl": "https://www.sec.gov/Archives/10q2.htm",
+        "exhibits": {},
+    },
+]
+
+
+class _MockTicker:
+    def __init__(self, sym):
+        self.sec_filings = _MOCK_YF_FILINGS
+
+
+def test_get_sec_filings_kpis(monkeypatch):
+    data_service.FILINGS_CACHE.clear()
+    monkeypatch.setattr(data_service.yf, "Ticker", _MockTicker)
+    result = data_service.get_sec_filings("AAPL")
+    kpis = result["kpis"]
+    assert kpis["total"] == 4
+    assert kpis["count_10k"] == 1
+    assert kpis["count_10q"] == 2
+    assert kpis["count_8k"] == 1
+    assert kpis["distinct_forms"] == 3
+
+
+def test_get_sec_filings_sorted_descending(monkeypatch):
+    data_service.FILINGS_CACHE.clear()
+    monkeypatch.setattr(data_service.yf, "Ticker", _MockTicker)
+    result = data_service.get_sec_filings("AAPL")
+    dates = [f["date"] for f in result["filings"]]
+    assert dates == sorted(dates, reverse=True)
+
+
+def test_get_sec_filings_url_from_exhibit(monkeypatch):
+    data_service.FILINGS_CACHE.clear()
+    monkeypatch.setattr(data_service.yf, "Ticker", _MockTicker)
+    result = data_service.get_sec_filings("AAPL")
+    # 10-K filing should use exhibit URL
+    ten_k = next(f for f in result["filings"] if f["form"] == "10-K")
+    assert ten_k["url"] == "https://www.sec.gov/Archives/10k.htm"
+
+
+def test_get_sec_filings_cadence(monkeypatch):
+    data_service.FILINGS_CACHE.clear()
+    monkeypatch.setattr(data_service.yf, "Ticker", _MockTicker)
+    result = data_service.get_sec_filings("AAPL")
+    months = [c["month"] for c in result["cadence"]]
+    assert "2024-10" in months
+    assert "2024-07" in months
+
+
+def test_get_sec_filings_form_mix(monkeypatch):
+    data_service.FILINGS_CACHE.clear()
+    monkeypatch.setattr(data_service.yf, "Ticker", _MockTicker)
+    result = data_service.get_sec_filings("AAPL")
+    top_form = result["form_mix"][0]["form"]
+    assert top_form == "10-Q"  # 2 count vs 1 each for 10-K and 8-K
+
+
+def test_get_sec_filings_readout(monkeypatch):
+    data_service.FILINGS_CACHE.clear()
+    monkeypatch.setattr(data_service.yf, "Ticker", _MockTicker)
+    result = data_service.get_sec_filings("AAPL")
+    assert "10-Q" in result["readout"]
+    assert "2024-10-31" in result["readout"]
+
+
+def test_get_sec_filings_empty(monkeypatch):
+    data_service.FILINGS_CACHE.clear()
+
+    class _EmptyTicker:
+        def __init__(self, sym):
+            self.sec_filings = []
+
+    monkeypatch.setattr(data_service.yf, "Ticker", _EmptyTicker)
+    result = data_service.get_sec_filings("AAPL")
+    assert result["kpis"]["total"] == 0
+    assert result["filings"] == []
+    assert "No SEC filings found" in result["readout"]
+
+
+def test_ticker_filings_route(monkeypatch):
+    data_service.FILINGS_CACHE.clear()
+    monkeypatch.setattr(data_service.yf, "Ticker", _MockTicker)
+    result = main.ticker_filings("AAPL")
+    assert result["kpis"]["total"] == 4
-- 
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