116 lines
2.5 KiB
Go
116 lines
2.5 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 cursor
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import (
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"reflect"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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func TestNewCursor(t *testing.T) {
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tracker := &cursorTracker{cursors: &sync.Map{}}
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cursor := tracker.NewCursor(State{})
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require.NotNil(t, cursor)
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require.Equal(t, 1, cursor.ID())
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cursor2 := tracker.NewCursor(State{})
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require.NotNil(t, cursor2)
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require.Equal(t, 2, cursor2.ID())
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}
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func TestGetCursor(t *testing.T) {
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tracker := &cursorTracker{cursors: &sync.Map{}}
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newCursor := tracker.NewCursor(State{})
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retrievedCursor := tracker.GetCursor(newCursor.ID())
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require.True(t, reflect.DeepEqual(newCursor, retrievedCursor))
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}
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func TestRangeCursor(t *testing.T) {
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tracker := &cursorTracker{cursors: &sync.Map{}}
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tracker.NewCursor(State{})
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called := false
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tracker.RangeCursor(func(cursor Handle) bool {
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called = true
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require.Equal(t, 1, cursor.ID())
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return false
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})
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require.True(t, called)
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}
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func TestCursorHandleClose(t *testing.T) {
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tracker := &cursorTracker{cursors: &sync.Map{}}
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cursor := tracker.NewCursor(State{})
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id := cursor.ID()
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cursor.Close()
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c := tracker.GetCursor(id)
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require.Nil(t, c)
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}
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func TestCursorTrackerConcurrentCreateDelete(t *testing.T) {
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tracker := &cursorTracker{cursors: &sync.Map{}}
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stop := make(chan struct{})
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wg := sync.WaitGroup{}
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threadsForEachOperation := 100
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// Concurrently create cursors
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for range threadsForEachOperation {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for {
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select {
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case <-stop:
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return
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default:
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tracker.NewCursor(State{})
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}
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}
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}()
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}
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// Concurrently delete cursors
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for range threadsForEachOperation {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for {
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select {
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case <-stop:
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return
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default:
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tracker.RangeCursor(func(cursor Handle) bool {
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cursor.Close()
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return true // continue ranging
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})
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}
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}
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}()
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}
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// Run the concurrent operations for at least 2 seconds
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time.Sleep(2 * time.Second)
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close(stop)
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wg.Wait()
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}
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