tailscale/jsondb/db_test.go

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// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package jsondb
import (
"log"
"os"
"path/filepath"
"testing"
"github.com/google/go-cmp/cmp"
)
func TestDB(t *testing.T) {
dir, err := os.MkdirTemp("", "db-test")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
path := filepath.Join(dir, "db.json")
db, err := Open[testDB](path)
if err != nil {
t.Fatalf("creating empty DB: %v", err)
}
if diff := cmp.Diff(db.Data, &testDB{}, cmp.AllowUnexported(testDB{})); diff != "" {
t.Fatalf("unexpected empty DB content (-got+want):\n%s", diff)
}
db.Data.MyString = "test"
db.Data.unexported = "don't keep"
db.Data.AnInt = 42
if err := db.Save(); err != nil {
t.Fatalf("saving database: %v", err)
}
db2, err := Open[testDB](path)
if err != nil {
log.Fatalf("opening DB again: %v", err)
}
want := &testDB{
MyString: "test",
AnInt: 42,
}
if diff := cmp.Diff(db2.Data, want, cmp.AllowUnexported(testDB{})); diff != "" {
t.Fatalf("unexpected saved DB content (-got+want):\n%s", diff)
}
}
type testDB struct {
MyString string
unexported string
AnInt int64
}