Break A and E technical into subdecks

test_amateurfunk_anki.py

@@ -193,6 +193,48 @@ class TestAnkiBuild(unittest.TestCase):
             {"N": ["NA101"], "E": ["EA202"], "A": ["AA303"]},
         )
 
+    def test_split_class_packages_ship_topic_subdeck_tree(self):
+        # The E and A packages each stay one file but carry a deck tree:
+        # the anchoring class deck plus one sub-deck per first-level
+        # topic, with each card filed under its topic sub-deck.
+        self._build_all()
+        for letter in ("e", "a"):
+            apkg = self.out_dir / f"amateurfunk-technische-kenntnisse-{letter}.apkg"
+            db_path, _media, _names = extract_collection(apkg, self.root / letter)
+            conn = sqlite3.connect(db_path)
+            try:
+                decks = json.loads(
+                    conn.execute("select decks from col").fetchone()[0]
+                )
+                deck_names = {d["name"] for d in decks.values()}
+                id_to_name = {int(k): d["name"] for k, d in decks.items()}
+                card_decks = sorted(
+                    id_to_name[row[0]]
+                    for row in conn.execute("select did from cards")
+                )
+            finally:
+                conn.close()
+            root = f"Amateurfunk::Technische Kenntnisse::{letter.upper()}"
+            self.assertEqual(deck_names, {root, f"{root}::Grundlagen"})
+            self.assertEqual(card_decks, [f"{root}::Grundlagen"])
+
+    def test_single_topic_classes_ship_one_flat_deck(self):
+        # N (and E) are not split: one deck, card filed directly in it.
+        self._build_all()
+        apkg = self.out_dir / "amateurfunk-technische-kenntnisse-n.apkg"
+        db_path, _media, _names = extract_collection(apkg, self.root / "n")
+        conn = sqlite3.connect(db_path)
+        try:
+            decks = json.loads(
+                conn.execute("select decks from col").fetchone()[0]
+            )
+        finally:
+            conn.close()
+        self.assertEqual(
+            {d["name"] for d in decks.values()},
+            {"Amateurfunk::Technische Kenntnisse::N"},
+        )
+
     def test_apkg_contains_notes_cards_and_media(self):
         self._build_all()
         apkg = self.out_dir / "amateurfunk-technische-kenntnisse-n.apkg"