08034540f0
* *: add leak test and tiny clean up * *: unify test format and add leak test Conflicts: store/localstore/compactor_test.go mysql/error_test.go *: add leak test
53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package kv
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import (
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"bytes"
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/util/codec"
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"github.com/pingcap/tidb/util/testleak"
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"github.com/pingcap/tidb/util/types"
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)
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var _ = Suite(&testKeySuite{})
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type testKeySuite struct {
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}
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func (s *testKeySuite) TestPartialNext(c *C) {
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defer testleak.AfterTest(c)()
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// keyA represents a multi column index.
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keyA, err := codec.EncodeValue(nil, types.NewDatum("abc"), types.NewDatum("def"))
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c.Check(err, IsNil)
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keyB, err := codec.EncodeValue(nil, types.NewDatum("abca"), types.NewDatum("def"))
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// We only use first column value to seek.
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seekKey, err := codec.EncodeValue(nil, types.NewDatum("abc"))
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c.Check(err, IsNil)
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nextKey := Key(seekKey).Next()
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cmp := bytes.Compare(nextKey, keyA)
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c.Assert(cmp, Equals, -1)
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// Use next partial key, we can skip all index keys with first column value equal to "abc".
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nextPartialKey := Key(seekKey).PrefixNext()
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cmp = bytes.Compare(nextPartialKey, keyA)
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c.Assert(cmp, Equals, 1)
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cmp = bytes.Compare(nextPartialKey, keyB)
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c.Assert(cmp, Equals, -1)
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}
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