package db import ( "fmt" "io/ioutil" "os" "path/filepath" "testing" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" cmn "github.com/tendermint/tendermint/libs/common" ) func cleanupDBDir(dir, name string) { os.RemoveAll(filepath.Join(dir, name) + ".db") } func testBackendGetSetDelete(t *testing.T, backend DBBackendType) { // Default dirname, err := ioutil.TempDir("", fmt.Sprintf("test_backend_%s_", backend)) require.Nil(t, err) 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) } func TestDBIterator(t *testing.T) { for dbType := range backends { t.Run(fmt.Sprintf("%v", dbType), func(t *testing.T) { testDBIterator(t, dbType) }) } } func testDBIterator(t *testing.T, backend DBBackendType) { name := cmn.Fmt("test_%x", cmn.RandStr(12)) db := NewDB(name, backend, "") defer cleanupDBDir("", name) for i := 0; i < 10; i++ { if i != 6 { // but skip 6. db.Set(int642Bytes(int64(i)), nil) } } verifyIterator(t, db.Iterator(nil, nil), []int64{0, 1, 2, 3, 4, 5, 7, 8, 9}, "forward iterator") verifyIterator(t, db.ReverseIterator(nil, nil), []int64{9, 8, 7, 5, 4, 3, 2, 1, 0}, "reverse iterator") verifyIterator(t, db.Iterator(nil, int642Bytes(0)), []int64(nil), "forward iterator to 0") verifyIterator(t, db.ReverseIterator(nil, int642Bytes(10)), []int64(nil), "reverse iterator 10") verifyIterator(t, db.Iterator(int642Bytes(0), nil), []int64{0, 1, 2, 3, 4, 5, 7, 8, 9}, "forward iterator from 0") verifyIterator(t, db.Iterator(int642Bytes(1), nil), []int64{1, 2, 3, 4, 5, 7, 8, 9}, "forward iterator from 1") verifyIterator(t, db.ReverseIterator(int642Bytes(10), nil), []int64{9, 8, 7, 5, 4, 3, 2, 1, 0}, "reverse iterator from 10") verifyIterator(t, db.ReverseIterator(int642Bytes(9), nil), []int64{9, 8, 7, 5, 4, 3, 2, 1, 0}, "reverse iterator from 9") verifyIterator(t, db.ReverseIterator(int642Bytes(8), nil), []int64{8, 7, 5, 4, 3, 2, 1, 0}, "reverse iterator from 8") verifyIterator(t, db.Iterator(int642Bytes(5), int642Bytes(6)), []int64{5}, "forward iterator from 5 to 6") verifyIterator(t, db.Iterator(int642Bytes(5), int642Bytes(7)), []int64{5}, "forward iterator from 5 to 7") verifyIterator(t, db.Iterator(int642Bytes(5), int642Bytes(8)), []int64{5, 7}, "forward iterator from 5 to 8") verifyIterator(t, db.Iterator(int642Bytes(6), int642Bytes(7)), []int64(nil), "forward iterator from 6 to 7") verifyIterator(t, db.Iterator(int642Bytes(6), int642Bytes(8)), []int64{7}, "forward iterator from 6 to 8") verifyIterator(t, db.Iterator(int642Bytes(7), int642Bytes(8)), []int64{7}, "forward iterator from 7 to 8") verifyIterator(t, db.ReverseIterator(int642Bytes(5), int642Bytes(4)), []int64{5}, "reverse iterator from 5 to 4") verifyIterator(t, db.ReverseIterator(int642Bytes(6), int642Bytes(4)), []int64{5}, "reverse iterator from 6 to 4") verifyIterator(t, db.ReverseIterator(int642Bytes(7), int642Bytes(4)), []int64{7, 5}, "reverse iterator from 7 to 4") verifyIterator(t, db.ReverseIterator(int642Bytes(6), int642Bytes(5)), []int64(nil), "reverse iterator from 6 to 5") verifyIterator(t, db.ReverseIterator(int642Bytes(7), int642Bytes(5)), []int64{7}, "reverse iterator from 7 to 5") verifyIterator(t, db.ReverseIterator(int642Bytes(7), int642Bytes(6)), []int64{7}, "reverse iterator from 7 to 6") verifyIterator(t, db.Iterator(int642Bytes(0), int642Bytes(1)), []int64{0}, "forward iterator from 0 to 1") verifyIterator(t, db.ReverseIterator(int642Bytes(9), int642Bytes(8)), []int64{9}, "reverse iterator from 9 to 8") verifyIterator(t, db.Iterator(int642Bytes(2), int642Bytes(4)), []int64{2, 3}, "forward iterator from 2 to 4") verifyIterator(t, db.Iterator(int642Bytes(4), int642Bytes(2)), []int64(nil), "forward iterator from 4 to 2") verifyIterator(t, db.ReverseIterator(int642Bytes(4), int642Bytes(2)), []int64{4, 3}, "reverse iterator from 4 to 2") verifyIterator(t, db.ReverseIterator(int642Bytes(2), int642Bytes(4)), []int64(nil), "reverse iterator from 2 to 4") } func verifyIterator(t *testing.T, itr Iterator, expected []int64, msg string) { var list []int64 for itr.Valid() { list = append(list, bytes2Int64(itr.Key())) itr.Next() } assert.Equal(t, expected, list, msg) }