| /* |
| * Copyright 2019 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package buffer |
| |
| import ( |
| "reflect" |
| "sort" |
| "sync" |
| "testing" |
| |
| "google.golang.org/grpc/internal/grpctest" |
| ) |
| |
| const ( |
| numWriters = 10 |
| numWrites = 10 |
| ) |
| |
| type s struct { |
| grpctest.Tester |
| } |
| |
| func Test(t *testing.T) { |
| grpctest.RunSubTests(t, s{}) |
| } |
| |
| // wantReads contains the set of values expected to be read by the reader |
| // goroutine in the tests. |
| var wantReads []int |
| |
| func init() { |
| for i := 0; i < numWriters; i++ { |
| for j := 0; j < numWrites; j++ { |
| wantReads = append(wantReads, i) |
| } |
| } |
| } |
| |
| // TestSingleWriter starts one reader and one writer goroutine and makes sure |
| // that the reader gets all the value added to the buffer by the writer. |
| func (s) TestSingleWriter(t *testing.T) { |
| ub := NewUnbounded() |
| reads := []int{} |
| |
| var wg sync.WaitGroup |
| wg.Add(1) |
| go func() { |
| defer wg.Done() |
| ch := ub.Get() |
| for i := 0; i < numWriters*numWrites; i++ { |
| r := <-ch |
| reads = append(reads, r.(int)) |
| ub.Load() |
| } |
| }() |
| |
| wg.Add(1) |
| go func() { |
| defer wg.Done() |
| for i := 0; i < numWriters; i++ { |
| for j := 0; j < numWrites; j++ { |
| ub.Put(i) |
| } |
| } |
| }() |
| |
| wg.Wait() |
| if !reflect.DeepEqual(reads, wantReads) { |
| t.Errorf("reads: %#v, wantReads: %#v", reads, wantReads) |
| } |
| } |
| |
| // TestMultipleWriters starts multiple writers and one reader goroutine and |
| // makes sure that the reader gets all the data written by all writers. |
| func (s) TestMultipleWriters(t *testing.T) { |
| ub := NewUnbounded() |
| reads := []int{} |
| |
| var wg sync.WaitGroup |
| wg.Add(1) |
| go func() { |
| defer wg.Done() |
| ch := ub.Get() |
| for i := 0; i < numWriters*numWrites; i++ { |
| r := <-ch |
| reads = append(reads, r.(int)) |
| ub.Load() |
| } |
| }() |
| |
| wg.Add(numWriters) |
| for i := 0; i < numWriters; i++ { |
| go func(index int) { |
| defer wg.Done() |
| for j := 0; j < numWrites; j++ { |
| ub.Put(index) |
| } |
| }(i) |
| } |
| |
| wg.Wait() |
| sort.Ints(reads) |
| if !reflect.DeepEqual(reads, wantReads) { |
| t.Errorf("reads: %#v, wantReads: %#v", reads, wantReads) |
| } |
| } |