func testInsertMessage(mbox store.Folder, msg []byte, suffix uint64,
expectedID uint64, t *testing.T) {
// Try inserting a new message.
id, err := mbox.InsertNewMessage(msg, suffix)
if err != nil {
t.Errorf("For message #%d got error %v", expectedID, err)
}
if expectedID != id {
t.Errorf("For message #%[1]d expected id %[1]d got %[2]d", expectedID,
id)
}
last, _ := mbox.LastID()
next := mbox.NextID()
if last != id {
t.Errorf("For message #%[1]d expected id %[1]d got %[2]d", id, last)
}
if next != id+1 {
t.Errorf("For message #%[1]d expected id %[1]d got %[2]d", id+1, next)
}
// Try retrieving the same message.
testSuffix, testMsg, err := mbox.GetMessage(id)
if err != nil {
t.Errorf("For message #%d got error %v", expectedID, err)
}
if suffix != testSuffix {
t.Errorf("For message #%d expected suffix %d got %d", expectedID,
suffix, testSuffix)
}
if !bytes.Equal(msg, testMsg) {
t.Errorf(`For message #%d expected "%s" got "%s"`, expectedID,
string(msg), string(testMsg))
}
// Try inserting message with the same ID but different suffix.
err = mbox.InsertMessage(id, msg, suffix+1)
if err != store.ErrDuplicateID {
t.Errorf("For message #%d expected ErrDuplicateID got %v", expectedID, err)
}
}