package db import ( "fmt" "os" "path/filepath" "testing" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" cmn "github.com/tendermint/tmlibs/common" ) func cleanupDBDir(dir, name string) { os.RemoveAll(filepath.Join(dir, name) + ".db") } func testBackendGetSetDelete(t *testing.T, backend DBBackendType) { // Default dir, dirname := cmn.Tempdir(fmt.Sprintf("test_backend_%s_", backend)) defer dir.Close() db := NewDB("testdb", backend, dirname) // A nonexistent key should return nil, even if the key is empty require.Nil(t, db.Get([]byte(""))) // A nonexistent key should return nil, even if the key is nil require.Nil(t, db.Get(nil)) // A nonexistent key should return nil. key := []byte("abc") require.Nil(t, db.Get(key)) // Set empty value. db.Set(key, []byte("")) require.NotNil(t, db.Get(key)) require.Empty(t, db.Get(key)) // Set nil value. db.Set(key, nil) require.NotNil(t, db.Get(key)) require.Empty(t, db.Get(key)) // Delete. db.Delete(key) require.Nil(t, db.Get(key)) } func TestBackendsGetSetDelete(t *testing.T) { for dbType, _ := range backends { testBackendGetSetDelete(t, dbType) } } func withDB(t *testing.T, creator dbCreator, fn func(DB)) { name := cmn.Fmt("test_%x", cmn.RandStr(12)) db, err := creator(name, "") defer cleanupDBDir("", name) assert.Nil(t, err) fn(db) db.Close() } func TestBackendsNilKeys(t *testing.T) { // Test all backends. for dbType, creator := range backends { withDB(t, creator, func(db DB) { t.Run(fmt.Sprintf("Testing %s", dbType), func(t *testing.T) { // Nil keys are treated as the empty key for most operations. expect := func(key, value []byte) { if len(key) == 0 { // nil or empty assert.Equal(t, db.Get(nil), db.Get([]byte(""))) assert.Equal(t, db.Has(nil), db.Has([]byte(""))) } assert.Equal(t, db.Get(key), value) assert.Equal(t, db.Has(key), value != nil) } // Not set expect(nil, nil) // Set nil value db.Set(nil, nil) expect(nil, []byte("")) // Set empty value db.Set(nil, []byte("")) expect(nil, []byte("")) // Set nil, Delete nil db.Set(nil, []byte("abc")) expect(nil, []byte("abc")) db.Delete(nil) expect(nil, nil) // Set nil, Delete empty db.Set(nil, []byte("abc")) expect(nil, []byte("abc")) db.Delete([]byte("")) expect(nil, nil) // Set empty, Delete nil db.Set([]byte(""), []byte("abc")) expect(nil, []byte("abc")) db.Delete(nil) expect(nil, nil) // Set empty, Delete empty db.Set([]byte(""), []byte("abc")) expect(nil, []byte("abc")) db.Delete([]byte("")) expect(nil, nil) // SetSync nil, DeleteSync nil db.SetSync(nil, []byte("abc")) expect(nil, []byte("abc")) db.DeleteSync(nil) expect(nil, nil) // SetSync nil, DeleteSync empty db.SetSync(nil, []byte("abc")) expect(nil, []byte("abc")) db.DeleteSync([]byte("")) expect(nil, nil) // SetSync empty, DeleteSync nil db.SetSync([]byte(""), []byte("abc")) expect(nil, []byte("abc")) db.DeleteSync(nil) expect(nil, nil) // SetSync empty, DeleteSync empty db.SetSync([]byte(""), []byte("abc")) expect(nil, []byte("abc")) db.DeleteSync([]byte("")) expect(nil, nil) }) }) } } func TestGoLevelDBBackend(t *testing.T) { name := cmn.Fmt("test_%x", cmn.RandStr(12)) db := NewDB(name, GoLevelDBBackend, "") defer cleanupDBDir("", name) _, ok := db.(*GoLevelDB) assert.True(t, ok) }