GODT-1329: Dark mode, with macOS autodetect.

internal/frontend/theme/theme_test.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2021 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+// Package settings provides access to persistent user settings.
+package theme
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestIsAvailable(t *testing.T) {
+	r := require.New(t)
+
+	want := "dark"
+
+	r.True(IsAvailable("dark"))
+	r.True(IsAvailable(Dark))
+	r.True(IsAvailable(Theme(want)))
+
+	want = "light"
+	r.True(IsAvailable("light"))
+	r.True(IsAvailable(Light))
+	r.True(IsAvailable(Theme(want)))
+
+	want = "molokai"
+	r.False(IsAvailable(""))
+	r.False(IsAvailable("molokai"))
+	r.False(IsAvailable(Theme(want)))
+}