test: reorganize core suite into explicit domain files

tests/stats/test_stats_aggregator_output.py

@@ -0,0 +1,67 @@
+from __future__ import annotations
+
+from datetime import date
+
+from auditui.stats.aggregator import StatsAggregator
+from auditui.stats import aggregator as aggregator_mod
+
+
+def test_get_stats_returns_empty_without_client() -> None:
+    """Ensure stats aggregation short-circuits when API client is absent."""
+    aggregator = StatsAggregator(
+        client=None, auth=None, library_client=None, all_items=[]
+    )
+    assert aggregator.get_stats() == []
+
+
+def test_get_stats_builds_expected_rows(monkeypatch) -> None:
+    """Ensure aggregator assembles rows from listening, account, and email sources."""
+    monkeypatch.setattr(
+        aggregator_mod.listening_mod, "get_signup_year", lambda _client: 2015
+    )
+    monkeypatch.setattr(
+        aggregator_mod.listening_mod,
+        "get_listening_time",
+        lambda _client, duration, start_date: 120_000 if duration == 1 else 3_600_000,
+    )
+    monkeypatch.setattr(
+        aggregator_mod.listening_mod, "get_finished_books_count", lambda _lc, _items: 7
+    )
+    monkeypatch.setattr(
+        aggregator_mod.email_mod,
+        "resolve_email",
+        lambda *args, **kwargs: "user@example.com",
+    )
+    monkeypatch.setattr(aggregator_mod.account_mod, "get_country", lambda _auth: "US")
+    monkeypatch.setattr(
+        aggregator_mod.account_mod,
+        "get_account_info",
+        lambda _client: {
+            "subscription_details": [
+                {
+                    "name": "Premium",
+                    "next_bill_date": "2026-02-01T00:00:00Z",
+                    "next_bill_amount": {
+                        "currency_value": "14.95",
+                        "currency_code": "USD",
+                    },
+                }
+            ]
+        },
+    )
+
+    aggregator = StatsAggregator(
+        client=object(),
+        auth=object(),
+        library_client=object(),
+        all_items=[{}, {}, {}],
+    )
+    stats = dict(aggregator.get_stats(today=date(2026, 2, 1)))
+    assert stats["Email"] == "user@example.com"
+    assert stats["Country Store"] == "US"
+    assert stats["Signup Year"] == "2015"
+    assert stats["Subscription"] == "Premium"
+    assert stats["Price"] == "14.95 USD"
+    assert stats["This Month"] == "2m"
+    assert stats["This Year"] == "1h00"
+    assert stats["Books Finished"] == "7 / 3"