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|
package ringbuf
import (
"fmt"
"reflect"
"testing"
)
func assertEqual(found, expected interface{}) {
if !reflect.DeepEqual(found, expected) {
panic(fmt.Sprintf("found %#v, expected %#v", found, expected))
}
}
func testRange(low, hi int) []int {
result := make([]int, hi-low)
for i := low; i < hi; i++ {
result[i-low] = i
}
return result
}
func extractContents[T any](buf *Buffer[T]) (result []T) {
buf.Range(true, func(i *T) bool {
result = append(result, *i)
return false
})
return result
}
func TestRingbuf(t *testing.T) {
b := NewExpandableBuffer[int](16, 32)
numItems := 0
for i := 0; i < 32; i++ {
assertEqual(b.Length(), numItems)
b.Add(i)
numItems++
}
assertEqual(b.Length(), 32)
assertEqual(extractContents(b), testRange(0, 32))
for i := 32; i < 40; i++ {
b.Add(i)
assertEqual(b.Length(), 32)
}
assertEqual(b.Length(), 32)
assertEqual(extractContents(b), testRange(8, 40))
assertEqual(b.Length(), 32)
for i := 39; i >= 8; i-- {
assertEqual(b.Length(), i-7)
val, success := b.Pop()
assertEqual(success, true)
assertEqual(val, i)
}
_, success := b.Pop()
assertEqual(success, false)
}
func TestClear(t *testing.T) {
b := NewExpandableBuffer[int](8, 8)
for i := 1; i <= 4; i++ {
b.Add(i)
}
assertEqual(extractContents(b), testRange(1, 5))
b.Clear()
assertEqual(b.Length(), 0)
assertEqual(len(extractContents(b)), 0)
// verify that the internal storage was cleared (important for GC)
for i := 0; i < len(b.buffer); i++ {
assertEqual(b.buffer[i], 0)
}
}
|
