syncthing/lib/db/smallindex_test.go
Jakob Borg b50d57b7fd
lib/db: Refactor: use a Lowlevel type underneath Instance (ref #5198) (#5212)
This adds a thin type that holds the state associated with the
leveldb.DB, leaving the huge Instance type more or less stateless. Also
moves some keying stuff into the DB package so that other packages need
not know the keying specifics.

(This does not, yet, fix the cmd/stindex program, in order to keep the
diff size down. Hence the keying constants are still exported.)
2018-10-10 11:34:24 +02:00

53 lines
1.4 KiB
Go

// Copyright (C) 2018 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package db
import "testing"
func TestSmallIndex(t *testing.T) {
db := OpenMemory()
idx := newSmallIndex(db.DB, []byte{12, 34})
// ID zero should be unallocated
if val, ok := idx.Val(0); ok || val != nil {
t.Fatal("Unexpected return for nonexistent ID 0")
}
// A new key should get ID zero
if id := idx.ID([]byte("hello")); id != 0 {
t.Fatal("Expected 0, not", id)
}
// Looking up ID zero should work
if val, ok := idx.Val(0); !ok || string(val) != "hello" {
t.Fatalf(`Expected true, "hello", not %v, %q`, ok, val)
}
// Delete the key
idx.Delete([]byte("hello"))
// Next ID should be one
if id := idx.ID([]byte("key2")); id != 1 {
t.Fatal("Expected 1, not", id)
}
// Now lets create a new index instance based on what's actually serialized to the database.
idx = newSmallIndex(db.DB, []byte{12, 34})
// Status should be about the same as before.
if val, ok := idx.Val(0); ok || val != nil {
t.Fatal("Unexpected return for deleted ID 0")
}
if id := idx.ID([]byte("key2")); id != 1 {
t.Fatal("Expected 1, not", id)
}
// Setting "hello" again should get us ID 2, not 0 as it was originally.
if id := idx.ID([]byte("hello")); id != 2 {
t.Fatal("Expected 2, not", id)
}
}