get "/diary/new", {}
assert_equal [], User.find(user.id).languages
assert_select "html[lang=?]", "en"
get "/diary/new", {}, { "HTTP_ACCEPT_LANGUAGE" => "fr, en" }
get "/diary/new", {}
assert_equal [], User.find(user.id).languages
assert_select "html[lang=?]", "en"
get "/diary/new", {}, { "HTTP_ACCEPT_LANGUAGE" => "fr, en" }