1 files changed, 51 insertions, 0 deletions
diff --git a/test/integration/locale_path_test.rb b/test/integration/locale_path_test.rb
new file mode 100644
index 0000000..2c43ab2
--- /dev/null
+++ b/test/integration/locale_path_test.rb
@@ -0,0 +1,51 @@
+require 'test_helper'
+
+#
+# Test how we handle redirections and locales.
+#
+# The basic rules are:
+#
+# (1) If the browser header Accept-Language matches default locale, then don't do a locale prefix.
+# (2) If browser locale is supported in available_locales, but is not the default, then redirect.
+# (3) If browser locale is not in available_locales, use the default locale with no prefix.
+#
+# Settings in defaults.yml
+#
+#  default_locale: :en
+#  available_locales:
+#    - :en
+#    - :de
+#
+# NOTE: Although the browser sends the header Accept-Language, this is parsed by
+# ruby as HTTP_ACCEPT_LANGUAGE
+#
+
+class LocalePathTest < ActionDispatch::IntegrationTest
+  test "redirect if accept-language is not default locale" do
+    get_via_redirect '/', {}, 'HTTP_ACCEPT_LANGUAGE' => 'de'
+    assert_equal '/de', path
+    assert_equal({:locale => :de}, @controller.default_url_options)
+  end
+
+  test "no locale prefix" do
+    get_via_redirect '/', {}, 'HTTP_ACCEPT_LANGUAGE' => 'en'
+    assert_equal '/', path
+    assert_equal({:locale => nil}, @controller.default_url_options)
+
+    get_via_redirect '/', {}, 'HTTP_ACCEPT_LANGUAGE' => 'pt'
+    assert_equal '/', path
+    assert_equal({:locale => nil}, @controller.default_url_options)
+  end
+
+  test "no redirect if locale explicit" do
+    get_via_redirect '/de', {}, 'HTTP_ACCEPT_LANGUAGE' => 'en'
+    assert_equal '/de', path
+    assert_equal({:locale => :de}, @controller.default_url_options)
+  end
+
+  test "strip prefix from url options if locale is default" do
+    get_via_redirect '/en', {}, 'HTTP_ACCEPT_LANGUAGE' => 'en'
+    assert_equal '/en', path
+    assert_equal({:locale => nil}, @controller.default_url_options)
+  end
+end
+\ No newline at end of file