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package bpool
import (
"bytes"
"testing"
)
// TestSizedBufferPool checks that over-sized buffers are released and that new
// buffers are created in their place.
func TestSizedBufferPool(t *testing.T) {
var size int = 4
var capacity int = 1024
bufPool := NewSizedBufferPool(size, capacity)
b := bufPool.Get()
// Check the cap before we use the buffer.
if cap(b.Bytes()) != capacity {
t.Fatalf("buffer capacity incorrect: got %v want %v", cap(b.Bytes()),
capacity)
}
// Grow the buffer beyond our capacity and return it to the pool
b.Grow(capacity * 3)
bufPool.Put(b)
// Add some additional buffers to fill up the pool.
for i := 0; i < size; i++ {
bufPool.Put(bytes.NewBuffer(make([]byte, 0, bufPool.a*2)))
}
// Check that oversized buffers are being replaced.
if len(bufPool.c) < size {
t.Fatalf("buffer pool too small: got %v want %v", len(bufPool.c), size)
}
// Close the channel so we can iterate over it.
close(bufPool.c)
// Check that there are buffers of the correct capacity in the pool.
for buffer := range bufPool.c {
if cap(buffer.Bytes()) != bufPool.a {
t.Fatalf("returned buffers wrong capacity: got %v want %v",
cap(buffer.Bytes()), capacity)
}
}
}
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