// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 cache

import (
	"testing"
	"time"
)

func TestStatsCounter(t *testing.T) {
	c := statsCounter{}
	c.RecordHits(3)
	c.RecordMisses(2)
	c.RecordLoadSuccess(2 * time.Second)
	c.RecordLoadError(1 * time.Second)
	c.RecordEviction()

	var st Stats
	c.Snapshot(&st)

	if st.HitCount != 3 {
		t.Fatalf("unexpected hit count: %v", st)
	}
	if st.MissCount != 2 {
		t.Fatalf("unexpected miss count: %v", st)
	}
	if st.LoadSuccessCount != 1 {
		t.Fatalf("unexpected success count: %v", st)
	}
	if st.LoadErrorCount != 1 {
		t.Fatalf("unexpected error count: %v", st)
	}
	if st.TotalLoadTime != 3*time.Second {
		t.Fatalf("unexpected load time: %v", st)
	}
	if st.EvictionCount != 1 {
		t.Fatalf("unexpected eviction count: %v", st)
	}

	if st.RequestCount() != 5 {
		t.Fatalf("unexpected request count: %v", st.RequestCount())
	}
	if st.HitRate() != 0.6 {
		t.Fatalf("unexpected hit rate: %v", st.HitRate())
	}
	if st.MissRate() != 0.4 {
		t.Fatalf("unexpected miss rate: %v", st.MissRate())
	}
	if st.LoadErrorRate() != 0.5 {
		t.Fatalf("unexpected error rate: %v", st.LoadErrorRate())
	}
	if st.AverageLoadPenalty() != (1500 * time.Millisecond) {
		t.Fatalf("unexpected load penalty: %v", st.AverageLoadPenalty())
	}
}