// Copyright 2021 Antrea 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 egress

import (
	"testing"

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

func TestIDAllocator(t *testing.T) {
	a := newIDAllocator(1, 2)

	got, err := a.allocate()
	assert.NoError(t, err)
	assert.Equal(t, uint32(1), got)

	got, err = a.allocate()
	assert.NoError(t, err)
	assert.Equal(t, uint32(2), got)

	_, err = a.allocate()
	assert.Error(t, err)

	err = a.release(1)
	assert.NoError(t, err)

	err = a.release(2)
	assert.NoError(t, err)

	got, err = a.allocate()
	assert.NoError(t, err)
	assert.Equal(t, uint32(1), got)

	got, err = a.allocate()
	assert.NoError(t, err)
	assert.Equal(t, uint32(2), got)

	_, err = a.allocate()
	assert.Error(t, err)
}
