test(amazon): cover marketplace locale helpers

surfsense_backend/tests/unit/platforms/amazon/test_locale.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+from app.proprietary.platforms.amazon.locale import (
+    accept_language_for,
+    proxy_country_for,
+)
+
+
+def test_proxy_country_for_confirmed_marketplaces():
+    assert proxy_country_for("com") == "us"
+    assert proxy_country_for("co.uk") == "gb"
+    assert proxy_country_for("de") == "de"
+    assert proxy_country_for("fr") == "fr"
+    assert proxy_country_for("it") == "it"
+    assert proxy_country_for("es") == "es"
+
+
+def test_proxy_country_for_unknown_marketplace_falls_back():
+    assert proxy_country_for("co.jp") is None
+    assert proxy_country_for(None) is None
+
+
+def test_accept_language_for_marketplaces():
+    assert accept_language_for("co.uk") == "en-GB"
+    assert accept_language_for("de") == "de-DE"
+    assert accept_language_for("fr") == "fr-FR"
+    assert accept_language_for("it") == "it-IT"
+    assert accept_language_for("es") == "es-ES"
+
+
+def test_accept_language_for_unknown_marketplace_defaults_to_us_english():
+    assert accept_language_for("co.jp") == "en-US"
+    assert accept_language_for(None) == "en-US"