99 lines
2.7 KiB
Go
99 lines
2.7 KiB
Go
// Copyright 2019 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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"context"
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"errors"
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"testing"
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"github.com/pingcap/tidb/executor/internal/exec"
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"github.com/pingcap/tidb/expression"
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"github.com/pingcap/tidb/parser/mysql"
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"github.com/pingcap/tidb/sessionctx/variable"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/chunk"
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"github.com/pingcap/tidb/util/mock"
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"github.com/stretchr/testify/require"
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)
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var (
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_ exec.Executor = &mockErrorOperator{}
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)
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type mockErrorOperator struct {
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exec.BaseExecutor
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toPanic bool
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closed bool
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}
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func (e *mockErrorOperator) Open(_ context.Context) error {
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return nil
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}
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func (e *mockErrorOperator) Next(_ context.Context, _ *chunk.Chunk) error {
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if e.toPanic {
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panic("next panic")
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} else {
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return errors.New("next error")
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}
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}
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func (e *mockErrorOperator) Close() error {
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e.closed = true
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return errors.New("close error")
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}
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func getColumns() []*expression.Column {
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return []*expression.Column{
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{Index: 1, RetType: types.NewFieldType(mysql.TypeLonglong)},
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}
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}
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// close() must be called after next() to avoid goroutines leak
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func TestExplainAnalyzeInvokeNextAndClose(t *testing.T) {
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ctx := mock.NewContext()
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ctx.GetSessionVars().InitChunkSize = variable.DefInitChunkSize
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ctx.GetSessionVars().MaxChunkSize = variable.DefMaxChunkSize
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schema := expression.NewSchema(getColumns()...)
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baseExec := exec.NewBaseExecutor(ctx, schema, 0)
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explainExec := &ExplainExec{
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BaseExecutor: baseExec,
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explain: nil,
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}
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// mockErrorOperator returns errors
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mockOpr := mockErrorOperator{baseExec, false, false}
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explainExec.analyzeExec = &mockOpr
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tmpCtx := context.Background()
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_, err := explainExec.generateExplainInfo(tmpCtx)
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require.EqualError(t, err, "next error, close error")
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require.True(t, mockOpr.closed)
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// mockErrorOperator panic
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explainExec = &ExplainExec{
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BaseExecutor: baseExec,
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explain: nil,
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}
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mockOpr = mockErrorOperator{baseExec, true, false}
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explainExec.analyzeExec = &mockOpr
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defer func() {
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panicErr := recover()
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require.NotNil(t, panicErr)
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require.True(t, mockOpr.closed)
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}()
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_, _ = explainExec.generateExplainInfo(tmpCtx)
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require.FailNow(t, "generateExplainInfo should panic")
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}
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