We build too many walls and not enough bridges

internal/imap/mailbox_message_test.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2020 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 imap
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestDoNotCache(t *testing.T) {
+	var dnc doNotCacheError
+	require.NoError(t, dnc.errorOrNil())
+	_, ok := dnc.errorOrNil().(*doNotCacheError)
+	require.True(t, !ok, "should not be type doNotCacheError")
+
+	dnc.add(errors.New("first"))
+	require.True(t, dnc.errorOrNil() != nil, "should be error")
+	_, ok = dnc.errorOrNil().(*doNotCacheError)
+	require.True(t, ok, "should be type doNotCacheError")
+
+	dnc.add(errors.New("second"))
+	dnc.add(errors.New("third"))
+	t.Log(dnc.errorOrNil())
+}