go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/common/sync/mutexpool/pool_test.go (about)

     1  // Copyright 2017 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package mutexpool
    16  
    17  import (
    18  	"sync"
    19  	"testing"
    20  
    21  	. "github.com/smartystreets/goconvey/convey"
    22  )
    23  
    24  func TestPool(t *testing.T) {
    25  	t.Parallel()
    26  
    27  	Convey(`A mutex pool`, t, func() {
    28  		var pool P
    29  
    30  		Convey(`Can handle multiple concurrent Mutex accesses, and will clean up when finished.`, func() {
    31  			const total = 1000
    32  			var value int
    33  			var wg sync.WaitGroup
    34  
    35  			wg.Add(total)
    36  			for i := 0; i < total; i++ {
    37  				go func() {
    38  					pool.WithMutex("foo", func() {
    39  						value++
    40  					})
    41  					wg.Done()
    42  				}()
    43  			}
    44  
    45  			wg.Wait()
    46  			So(value, ShouldEqual, total)
    47  			So(pool.mutexes, ShouldHaveLength, 0)
    48  		})
    49  
    50  		Convey(`Can handle multiple keys.`, func() {
    51  			const total = 100
    52  			var recLock func(int)
    53  			recLock = func(v int) {
    54  				if v < total {
    55  					pool.WithMutex(v, func() {
    56  						So(pool.mutexes, ShouldHaveLength, v+1)
    57  						recLock(v + 1)
    58  					})
    59  				}
    60  			}
    61  			recLock(0)
    62  			So(pool.mutexes, ShouldHaveLength, 0)
    63  		})
    64  	})
    65  }