github.com/dtroyer-salad/og2/v2@v2.0.0-20240412154159-c47231610877/internal/syncutil/pool_test.go (about)

     1  /*
     2  Copyright The ORAS Authors.
     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  
    16  package syncutil
    17  
    18  import (
    19  	"sync"
    20  	"sync/atomic"
    21  	"testing"
    22  )
    23  
    24  func TestPool(t *testing.T) {
    25  	var pool Pool[int64]
    26  	numbers := [][]int{
    27  		{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
    28  		{-1, -2, -3, -4, -5, -6, -7, -8, -9, -10},
    29  	}
    30  
    31  	// generate expected result
    32  	expected := make([]int, len(numbers))
    33  	for i, nums := range numbers {
    34  		for _, num := range nums {
    35  			expected[i] += num
    36  		}
    37  	}
    38  
    39  	// test pool
    40  	for i, nums := range numbers {
    41  		val, done := pool.Get(i)
    42  		*val = 0
    43  		var wg sync.WaitGroup
    44  		for _, num := range nums {
    45  			wg.Add(1)
    46  			go func(n int) {
    47  				defer wg.Done()
    48  				val, done := pool.Get(i)
    49  				defer done()
    50  				atomic.AddInt64(val, int64(n))
    51  			}(num)
    52  		}
    53  		wg.Wait()
    54  		item := pool.items[i]
    55  		if got := item.value; got != int64(expected[i]) {
    56  			t.Errorf("Pool.Get(%v).value = %v, want %v", i, got, expected[i])
    57  		}
    58  		if got := item.refCount; got != 1 {
    59  			t.Errorf("Pool.Get(%v).refCount = %v, want %v", i, got, 1)
    60  		}
    61  
    62  		// item should be cleaned up after done
    63  		done()
    64  		got := pool.items[i]
    65  		if got != nil {
    66  			t.Errorf("Pool.Get(%v) = %v, want %v", i, got, nil)
    67  		}
    68  	}
    69  }