// Copyright 2022 ByteDance Inc.
//
// 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 gctuner

import (
	"runtime"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestMem(t *testing.T) {
	defer runtime.GC() // make it will not affect other tests

	is := assert.New(t)
	const mb = 1024 * 1024

	heap := make([]byte, 100*mb+1)
	inuse := readMemoryInuse()
	t.Logf("mem inuse: %d MB", inuse/mb)
	is.GreaterOrEqual(inuse, uint64(100*mb))
	heap[0] = 0
}