fix: expand us-cpa extraction review and rendering

skills/us-cpa/tests/test_sources.py

@@ -12,6 +12,7 @@ from us_cpa.sources import (
     authority_rank_for,
     bootstrap_irs_catalog,
     build_irs_prior_pdf_url,
+    build_primary_law_authorities,
 )
 
 
@@ -42,6 +43,17 @@ class SourceCatalogTests(unittest.TestCase):
         self.assertGreaterEqual(len(catalog), 5)
         self.assertEqual(catalog[0].url, "https://www.irs.gov/pub/irs-prior/f1040--2025.pdf")
         self.assertTrue(any(item.slug == "i1040gi" for item in catalog))
+        self.assertTrue(any(item.slug == "f1040sse" for item in catalog))
+
+    def test_primary_law_authorities_build_official_urls(self) -> None:
+        authorities = build_primary_law_authorities(
+            "Does section 469 apply and what does Treas. Reg. 1.469-1 say?"
+        )
+
+        self.assertTrue(any(item["sourceClass"] == "internal_revenue_code" for item in authorities))
+        self.assertTrue(any(item["sourceClass"] == "treasury_regulation" for item in authorities))
+        self.assertTrue(any("uscode.house.gov" in item["url"] for item in authorities))
+        self.assertTrue(any("ecfr.gov" in item["url"] for item in authorities))
 
 
 class TaxYearCorpusTests(unittest.TestCase):