feat: add maintenance module for message deletion and related utilities

feat: implement tests for maintenance functions and dashboard interactions
feat: add timezone and country tests for thctime module

tests/test_thctime.py

@@ -0,0 +1,47 @@
+import thctime
+
+
+def test_load_timezones_and_countries():
+    tzs = thctime.load_timezones()
+    countries = thctime.load_countries()
+    assert any(t["zone_name"] == "America/New_York" for t in tzs)
+    assert any(c["country_code"] == "US" for c in countries)
+
+
+def test_get_tz_and_country_info():
+    timezones = [{"zone_name": "A/B", "country_code": "US"}]
+    countries = [{"country_code": "US", "country_name": "United States"}]
+    assert thctime.get_tz_info("A/B", timezones)["zone_name"] == "A/B"
+    assert thctime.get_country_info("US", countries)[
+        "country_name"] == "United States"
+    assert thctime.get_tz_info("X/Y", timezones) is None
+    assert thctime.get_country_info("XX", countries) is None
+
+
+def test_where_is_it_420(monkeypatch):
+    monkeypatch.setattr(thctime.pytz, "all_timezones", ["Etc/UTC"])
+
+    tzs = [{"zone_name": "Etc/UTC", "country_code": "ZZ"}]
+    countries = [{"country_code": "ZZ", "country_name": "Nowhere"}]
+
+    class FakeDatetime:
+        @staticmethod
+        def now(tz):
+            class Result:
+                hour = 4
+
+            return Result()
+
+    monkeypatch.setattr(thctime, "datetime", FakeDatetime)
+
+    res = thctime.where_is_it_420(tzs, countries)
+    assert res == ["Nowhere"]
+
+
+def test_split_tz_name():
+    assert thctime.split_tz_name("America/New_York") == ("America", "New_York")
+    assert thctime.split_tz_name("America/Argentina/Buenos_Aires") == (
+        "America",
+        "Argentina/Buenos_Aires",
+    )
+    assert thctime.split_tz_name("UTC") == ("UTC", "")