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// Copyright (C) 2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package containers
import (
"context"
"fmt"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
func (c *arCache[K, V]) String() string {
c.mu.RLock()
defer c.mu.RUnlock()
fullLen := len(c.liveByName) + len(c.ghostByName)
keys := make([]string, 0, fullLen)
for entry := c.recentGhost.Oldest; entry != nil; entry = entry.Newer {
keys = append(keys, fmt.Sprint(entry.Value.key))
}
for entry := c.recentLive.Oldest; entry != nil; entry = entry.Newer {
keys = append(keys, fmt.Sprint(entry.Value.key))
}
for entry := c.frequentLive.Newest; entry != nil; entry = entry.Older {
keys = append(keys, fmt.Sprint(entry.Value.key))
}
for entry := c.frequentGhost.Newest; entry != nil; entry = entry.Older {
keys = append(keys, fmt.Sprint(entry.Value.key))
}
keyLen := 3
for _, key := range keys {
keyLen = max(keyLen, len(key))
}
var out strings.Builder
blankLeft := c.cap - (c.recentLive.Len + c.recentGhost.Len)
for i := 0; i <= 2*c.cap; i++ {
sep := []byte(" ")
if i == blankLeft+c.recentGhost.Len {
sep[0] = '['
}
if i == blankLeft+c.recentGhost.Len+c.recentLive.Len {
sep[1] = '!'
}
if i == blankLeft+c.recentGhost.Len+c.recentLive.Len-c.recentLiveTarget {
sep[2] = '^'
}
if i == blankLeft+c.recentGhost.Len+c.recentLive.Len+c.frequentLive.Len {
sep[3] = ']'
}
out.Write(sep)
if i < 2*c.cap {
key := ""
if i >= blankLeft && i < blankLeft+fullLen {
key = keys[i-blankLeft]
}
spaceLeft := (keyLen - len(key)) / 2
out.WriteString(strings.Repeat("_", spaceLeft))
out.WriteString(key)
out.WriteString(strings.Repeat("_", keyLen-len(key)-spaceLeft))
}
}
return out.String()
}
func TestARCacheString(t *testing.T) {
t.Parallel()
cache := NewARCache[int, int](4, SourceFunc[int, int](func(context.Context, int, *int) {})).(*arCache[int, int])
assert.Equal(t, ` ___ ___ ___ ___[!^]___ ___ ___ ___ `, cache.String())
}
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