add windows support

vendor/github.com/google/gopacket/writer_test.go

@@ -0,0 +1,94 @@
+// Copyright 2012 Google, Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree.
+
+package gopacket
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestExponentialSizeIncreasePrepend(t *testing.T) {
+	var b serializeBuffer
+	for i, test := range []struct {
+		prepend, size int
+	}{
+		{2, 2},
+		{2, 4},
+		{2, 8},
+		{2, 8},
+		{2, 16},
+		{2, 16},
+		{2, 16},
+		{2, 16},
+		{2, 32},
+	} {
+		b.PrependBytes(test.prepend)
+		if test.size != cap(b.data) {
+			t.Error(i, "size want", test.size, "got", cap(b.data))
+		}
+	}
+	b.Clear()
+	if b.start != 32 {
+		t.Error(b.start)
+	}
+}
+
+func TestExponentialSizeIncreaseAppend(t *testing.T) {
+	var b serializeBuffer
+	for i, test := range []struct {
+		appnd, size int
+	}{
+		{2, 2},
+		{2, 4},
+		{2, 8},
+		{2, 8},
+		{2, 16},
+		{2, 16},
+		{2, 16},
+		{2, 16},
+		{2, 32},
+	} {
+		b.AppendBytes(test.appnd)
+		if test.size != cap(b.data) {
+			t.Error(i, "size want", test.size, "got", cap(b.data))
+		}
+	}
+	b.Clear()
+	if b.start != 0 {
+		t.Error(b.start)
+	}
+}
+
+func ExampleSerializeBuffer() {
+	b := NewSerializeBuffer()
+	fmt.Println("1:", b.Bytes())
+	bytes, _ := b.PrependBytes(3)
+	copy(bytes, []byte{1, 2, 3})
+	fmt.Println("2:", b.Bytes())
+	bytes, _ = b.AppendBytes(2)
+	copy(bytes, []byte{4, 5})
+	fmt.Println("3:", b.Bytes())
+	bytes, _ = b.PrependBytes(1)
+	copy(bytes, []byte{0})
+	fmt.Println("4:", b.Bytes())
+	bytes, _ = b.AppendBytes(3)
+	copy(bytes, []byte{6, 7, 8})
+	fmt.Println("5:", b.Bytes())
+	b.Clear()
+	fmt.Println("6:", b.Bytes())
+	bytes, _ = b.PrependBytes(2)
+	copy(bytes, []byte{9, 9})
+	fmt.Println("7:", b.Bytes())
+	// Output:
+	// 1: []
+	// 2: [1 2 3]
+	// 3: [1 2 3 4 5]
+	// 4: [0 1 2 3 4 5]
+	// 5: [0 1 2 3 4 5 6 7 8]
+	// 6: []
+	// 7: [9 9]
+}