// Copyright 2022 TiKV Project 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 ratelimit

import (
	"testing"

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

func TestConcurrencyLimiter(t *testing.T) {
	t.Parallel()
	re := require.New(t)
	cl := newConcurrencyLimiter(10)
	for i := 0; i < 10; i++ {
		re.True(cl.allow())
	}
	re.False(cl.allow())
	cl.release()
	re.True(cl.allow())
	re.Equal(uint64(10), cl.getLimit())
	cl.setLimit(5)
	re.Equal(uint64(5), cl.getLimit())
	re.Equal(uint64(10), cl.getCurrent())
	cl.release()
	re.Equal(uint64(9), cl.getCurrent())
}