github.com/bytedance/gopkg@v0.0.0-20240514070511-01b2cbcf35e1/util/gctuner/mem_test.go (about)

     1  // Copyright 2022 ByteDance Inc.
     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 gctuner
    16  
    17  import (
    18  	"runtime"
    19  	"testing"
    20  
    21  	"github.com/stretchr/testify/assert"
    22  )
    23  
    24  func TestMem(t *testing.T) {
    25  	defer runtime.GC() // make it will not affect other tests
    26  
    27  	is := assert.New(t)
    28  	const mb = 1024 * 1024
    29  
    30  	heap := make([]byte, 100*mb+1)
    31  	inuse := readMemoryInuse()
    32  	t.Logf("mem inuse: %d MB", inuse/mb)
    33  	is.GreaterOrEqual(inuse, uint64(100*mb))
    34  	heap[0] = 0
    35  }