Add unittests for server-side translations

games/devtest/mods/unittests/init.lua

@@ -182,6 +182,7 @@ dofile(modpath .. "/get_version.lua")
 dofile(modpath .. "/itemstack_equals.lua")
 dofile(modpath .. "/content_ids.lua")
 dofile(modpath .. "/metadata.lua")
+dofile(modpath .. "/translations.lua")
 
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games/devtest/mods/unittests/locale/unittests.de.tr

@@ -0,0 +1,5 @@
+# textdomain: unittests
+# Note that the "translations" here are only for testing; it is not necessary
+# to actually translate any text here.
+Only in primary language.=Result in primary language.
+Available in both languages.=Result in primary language.

games/devtest/mods/unittests/locale/unittests.fr.tr

@@ -0,0 +1,5 @@
+# textdomain: unittests
+# Note that the "translations" here are only for testing; it is not necessary
+# to actually translate any text here.
+Only in secondary language.=Result in secondary language.
+Available in both languages.=Result in secondary language.

games/devtest/mods/unittests/translations.lua

@@ -0,0 +1,13 @@
+local S = core.get_translator("unittests")
+
+local function test_server_translation()
+	local function translate(str)
+		return core.get_translated_string("de:fr", S(str))
+	end
+	local RESULT_PRIMARY = "Result in primary language."
+	local RESULT_SECONDARY = "Result in secondary language."
+	assert(translate("Only in primary language.") == RESULT_PRIMARY, "missing translation for primary language")
+	assert(translate("Only in secondary language.") == RESULT_SECONDARY, "missing translation for secondary language")
+	assert(translate("Available in both languages.") == RESULT_PRIMARY, "incorrect translation priority list applied")
+end
+unittests.register("test_server_translation", test_server_translation)