95 lines
1.7 KiB
Go
95 lines
1.7 KiB
Go
// Copyright 2012 Google, Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the LICENSE file in the root of the source
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// tree.
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package gopacket
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import (
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"fmt"
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"testing"
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)
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func TestExponentialSizeIncreasePrepend(t *testing.T) {
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var b serializeBuffer
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for i, test := range []struct {
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prepend, size int
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}{
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{2, 2},
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{2, 4},
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{2, 8},
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{2, 8},
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{2, 16},
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{2, 16},
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{2, 16},
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{2, 16},
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{2, 32},
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} {
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b.PrependBytes(test.prepend)
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if test.size != cap(b.data) {
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t.Error(i, "size want", test.size, "got", cap(b.data))
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}
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}
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b.Clear()
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if b.start != 32 {
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t.Error(b.start)
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}
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}
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func TestExponentialSizeIncreaseAppend(t *testing.T) {
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var b serializeBuffer
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for i, test := range []struct {
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appnd, size int
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}{
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{2, 2},
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{2, 4},
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{2, 8},
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{2, 8},
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{2, 16},
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{2, 16},
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{2, 16},
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{2, 16},
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{2, 32},
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} {
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b.AppendBytes(test.appnd)
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if test.size != cap(b.data) {
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t.Error(i, "size want", test.size, "got", cap(b.data))
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}
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}
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b.Clear()
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if b.start != 0 {
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t.Error(b.start)
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}
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}
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func ExampleSerializeBuffer() {
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b := NewSerializeBuffer()
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fmt.Println("1:", b.Bytes())
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bytes, _ := b.PrependBytes(3)
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copy(bytes, []byte{1, 2, 3})
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fmt.Println("2:", b.Bytes())
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bytes, _ = b.AppendBytes(2)
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copy(bytes, []byte{4, 5})
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fmt.Println("3:", b.Bytes())
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bytes, _ = b.PrependBytes(1)
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copy(bytes, []byte{0})
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fmt.Println("4:", b.Bytes())
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bytes, _ = b.AppendBytes(3)
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copy(bytes, []byte{6, 7, 8})
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fmt.Println("5:", b.Bytes())
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b.Clear()
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fmt.Println("6:", b.Bytes())
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bytes, _ = b.PrependBytes(2)
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copy(bytes, []byte{9, 9})
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fmt.Println("7:", b.Bytes())
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// Output:
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// 1: []
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// 2: [1 2 3]
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// 3: [1 2 3 4 5]
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// 4: [0 1 2 3 4 5]
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// 5: [0 1 2 3 4 5 6 7 8]
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// 6: []
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// 7: [9 9]
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}
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