Add test

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

test/pleroma/language/language_detector_test.ex

@@ -0,0 +1,31 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Language.LanguageDetectorTest do
+  use Pleroma.Web.ConnCase
+
+  alias Pleroma.Language.LanguageDetector
+
+  setup do: clear_config([Pleroma.Language.LanguageDetector, :provider], LanguageDetectorMock)
+
+  test "it detects text language" do
+    detected_language = LanguageDetector.detect("Je viens d'atterrir en Tchéquie.")
+
+    assert detected_language == "fr"
+  end
+
+  test "it returns nil if text is not long enough" do
+    detected_language = LanguageDetector.detect("it returns nil")
+
+    assert detected_language == nil
+  end
+
+  test "it returns nil if no provider specified" do
+    clear_config([Pleroma.Language.LanguageDetector, :provider], nil)
+
+    detected_language = LanguageDetector.detect("this should also return nil")
+
+    assert detected_language == nil
+  end
+end