73 lines
2.3 KiB
Go
73 lines
2.3 KiB
Go
// Copyright 2024 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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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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 executor
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import (
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"testing"
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"github.com/pingcap/tidb/pkg/executor/internal/exec"
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"github.com/pingcap/tidb/pkg/expression/contextstatic"
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"github.com/pingcap/tidb/pkg/util/mock"
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"github.com/stretchr/testify/require"
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)
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type mockSimpleExecutor struct {
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exec.BaseExecutorV2
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}
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func TestDetachExecutor(t *testing.T) {
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// call `Detach` on a mock executor will fail
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_, ok := Detach(&mockSimpleExecutor{})
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require.False(t, ok)
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// call `Detach` on a TableReaderExecutor will succeed
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oldExec := &TableReaderExecutor{
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tableReaderExecutorContext: tableReaderExecutorContext{
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ectx: contextstatic.NewStaticExprContext(),
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},
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}
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newExec, ok := Detach(oldExec)
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require.True(t, ok)
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require.NotSame(t, oldExec, newExec)
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// call `Detach` on a `TableReaderExecutor` with `mockSimpleExecutor` as child will fail
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sess := mock.NewContext()
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oldExec = &TableReaderExecutor{
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tableReaderExecutorContext: tableReaderExecutorContext{
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ectx: contextstatic.NewStaticExprContext(),
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},
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BaseExecutorV2: exec.NewBaseExecutorV2(sess.GetSessionVars(), nil, 0, &mockSimpleExecutor{}),
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}
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_, ok = Detach(oldExec)
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require.False(t, ok)
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// call `Detach` on a `TableReaderExecutor` with another `TableReaderExecutor` as child will succeed
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child := &TableReaderExecutor{
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tableReaderExecutorContext: tableReaderExecutorContext{
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ectx: contextstatic.NewStaticExprContext(),
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},
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}
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parent := &TableReaderExecutor{
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tableReaderExecutorContext: tableReaderExecutorContext{
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ectx: contextstatic.NewStaticExprContext(),
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},
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BaseExecutorV2: exec.NewBaseExecutorV2(sess.GetSessionVars(), nil, 0, child),
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}
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newExec, ok = Detach(parent)
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require.True(t, ok)
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require.NotSame(t, parent, newExec)
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require.NotSame(t, child, newExec.AllChildren()[0])
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}
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