go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/gae/impl/memory/race_test.go (about)

     1  // Copyright 2015 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 memory
    16  
    17  import (
    18  	"context"
    19  	"fmt"
    20  	"sync"
    21  	"sync/atomic"
    22  	"testing"
    23  
    24  	ds "go.chromium.org/luci/gae/service/datastore"
    25  )
    26  
    27  func TestRaceGetPut(t *testing.T) {
    28  	t.Parallel()
    29  
    30  	value := int32(0)
    31  	num := int32(0)
    32  
    33  	c := Use(context.Background())
    34  
    35  	wg := sync.WaitGroup{}
    36  
    37  	for i := 0; i < 100; i++ {
    38  		wg.Add(1)
    39  		go func() {
    40  			defer wg.Done()
    41  
    42  			err := ds.RunInTransaction(c, func(c context.Context) error {
    43  				atomic.AddInt32(&num, 1)
    44  
    45  				obj := pmap("$key", ds.MakeKey(c, "Obj", 1))
    46  				if err := ds.Get(c, obj); err != nil && err != ds.ErrNoSuchEntity {
    47  					panic(fmt.Sprintf("error get: %s", err))
    48  				}
    49  				cur := int64(0)
    50  				if ps := obj.Slice("Value"); len(ps) > 0 {
    51  					cur = ps[0].Value().(int64)
    52  				}
    53  
    54  				cur++
    55  				obj["Value"] = prop(cur)
    56  
    57  				return ds.Put(c, obj)
    58  			}, &ds.TransactionOptions{Attempts: 200})
    59  
    60  			if err != nil {
    61  				panic(fmt.Sprintf("error during transaction: %s", err))
    62  			}
    63  
    64  			atomic.AddInt32(&value, 1)
    65  		}()
    66  	}
    67  	wg.Wait()
    68  
    69  	obj := pmap("$key", ds.MakeKey(c, "Obj", 1))
    70  	if ds.Get(c, obj) != nil {
    71  		t.FailNow()
    72  	}
    73  	t.Logf("Ran %d inner functions", num)
    74  	if int64(value) != obj.Slice("Value")[0].Value().(int64) {
    75  		t.Fatalf("value wrong value %d v %d", value, obj.Slice("Value")[0].Value().(int64))
    76  	}
    77  }
    78  
    79  func TestRaceNonConflictingPuts(t *testing.T) {
    80  	t.Parallel()
    81  
    82  	c := Use(context.Background())
    83  
    84  	num := int32(0)
    85  
    86  	wg := sync.WaitGroup{}
    87  
    88  	for i := 0; i < 100; i++ {
    89  		wg.Add(1)
    90  		go func() {
    91  			defer wg.Done()
    92  
    93  			err := ds.RunInTransaction(c, func(c context.Context) error {
    94  				return ds.Put(c, pmap(
    95  					"$kind", "Thing", Next,
    96  					"Value", 100))
    97  			}, nil)
    98  			if err != nil {
    99  				panic(fmt.Sprintf("error during transaction: %s", err))
   100  			}
   101  			atomic.AddInt32(&num, 1)
   102  		}()
   103  	}
   104  	wg.Wait()
   105  
   106  	if num != 100 {
   107  		t.Fatal("expected 100 runs, got", num)
   108  	}
   109  }