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package mssql
import (
"bytes"
"testing"
)
type closableBuffer struct {
*bytes.Buffer
}
func (closableBuffer) Close() error {
return nil
}
func makeBuf(bufSize uint16, testData []byte) *tdsBuffer {
buffer := closableBuffer{bytes.NewBuffer(testData)}
return newTdsBuffer(bufSize, &buffer)
}
func TestStreamShorterThanHeader(t *testing.T) {
//buffer := closableBuffer{*bytes.NewBuffer([]byte{0xFF, 0xFF})}
//buffer := closableBuffer{*bytes.NewBuffer([]byte{0x6F, 0x96, 0x19, 0xFF, 0x8B, 0x86, 0xD0, 0x11, 0xB4, 0x2D, 0x00, 0xC0, 0x4F, 0xC9, 0x64, 0xFF})}
//tdsBuffer := newTdsBuffer(100, &buffer)
buffer := makeBuf(100, []byte{0xFF, 0xFF})
_, err := buffer.BeginRead()
if err == nil {
t.Fatal("BeginRead was expected to return error but it didn't")
} else {
t.Log("BeginRead failed as expected with error:", err.Error())
}
}
func TestInvalidLengthInHeaderTooLong(t *testing.T) {
buffer := makeBuf(8, []byte{0xFF, 0xFF, 0x0, 0x9, 0xff, 0xff, 0xff, 0xff})
_, err := buffer.BeginRead()
if err == nil {
t.Fatal("BeginRead was expected to return error but it didn't")
} else {
t.Log("BeginRead failed as expected with error:", err.Error())
}
}
func TestInvalidLengthInHeaderTooShort(t *testing.T) {
buffer := makeBuf(100, []byte{0xFF, 0xFF, 0x0, 0x1, 0xff, 0xff, 0xff, 0xff})
_, err := buffer.BeginRead()
if err == nil {
t.Fatal("BeginRead was expected to return error but it didn't")
} else {
t.Log("BeginRead failed as expected with error:", err.Error())
}
}
func TestInvalidLengthInHeaderLongerThanIncomingBuffer(t *testing.T) {
buffer := makeBuf(9, []byte{0xFF, 0xFF, 0x0, 0x9, 0xff, 0xff, 0xff, 0xff})
_, err := buffer.BeginRead()
if err == nil {
t.Fatal("BeginRead was expected to return error but it didn't")
} else {
t.Log("BeginRead failed as expected with error:", err.Error())
}
}
func TestBeginReadSucceeds(t *testing.T) {
buffer := makeBuf(9, []byte{0x01 /*id*/, 0xFF /*status*/, 0x0, 0x9 /*size*/, 0xff, 0xff, 0xff, 0xff, 0x02 /*test byte*/})
id, err := buffer.BeginRead()
if err != nil {
t.Fatal("BeginRead failed:", err.Error())
}
if id != 1 {
t.Fatalf("Expected id to be 1 but it is %d", id)
}
b, err := buffer.ReadByte()
if err != nil {
t.Fatal("ReadByte failed:", err.Error())
}
if b != 2 {
t.Fatalf("Expected read byte to be 2 but it is %d", b)
}
// should fail because no more bytes left
_, err = buffer.ReadByte()
if err == nil {
t.Fatal("ReadByte was expected to return error but it didn't")
} else {
t.Log("ReadByte failed as expected with error:", err.Error())
}
testBuf := []byte{0, 1, 2}
// should fail because no more bytes left
_, err = buffer.Read(testBuf)
if err == nil {
t.Fatal("Read was expected to return error but it didn't")
} else {
t.Log("Read failed as expected with error:", err.Error())
}
}
func TestReadByteFailsOnSecondPacket(t *testing.T) {
buffer := makeBuf(9, []byte{
0x01 /*id*/, 0x0 /*not final*/, 0x0, 0x9 /*size*/, 0xff, 0xff, 0xff, 0xff, 0x02, /*test byte*/
0x01 /*next id, this packet is invalid, it is too short*/})
_, err := buffer.BeginRead()
if err != nil {
t.Fatal("BeginRead failed:", err.Error())
}
_, err = buffer.ReadByte()
if err != nil {
t.Fatal("ReadByte failed:", err.Error())
}
_, err = buffer.ReadByte()
if err == nil {
t.Fatal("ReadByte was expected to return error but it didn't")
} else {
t.Log("ReadByte failed as expected with error:", err.Error())
}
}
func TestReadFailsOnSecondPacket(t *testing.T) {
buffer := makeBuf(9, []byte{
0x01 /*id*/, 0x0 /*not final*/, 0x0, 0x9 /*size*/, 0xff, 0xff, 0xff, 0xff, 0x02, /*test byte*/
0x01 /*next id, this packet is invalid, it is too short*/})
_, err := buffer.BeginRead()
if err != nil {
t.Fatal("BeginRead failed:", err.Error())
}
testBuf := []byte{0}
_, err = buffer.Read(testBuf)
if err != nil {
t.Fatal("Read failed:", err.Error())
}
if testBuf[0] != 2 {
t.Fatal("Read returned invalid value")
}
_, err = buffer.Read(testBuf)
if err == nil {
t.Fatal("ReadByte was expected to return error but it didn't")
} else {
t.Log("ReadByte failed as expected with error:", err.Error())
}
}
func TestWrite(t *testing.T) {
memBuf := bytes.NewBuffer([]byte{})
buf := newTdsBuffer(11, closableBuffer{memBuf})
buf.BeginPacket(1)
err := buf.WriteByte(2)
if err != nil {
t.Fatal("WriteByte failed:", err.Error())
}
wrote, err := buf.Write([]byte{3, 4})
if err != nil {
t.Fatal("Write failed:", err.Error())
}
if wrote != 2 {
t.Fatalf("Write returned invalid value of written bytes %d", wrote)
}
err = buf.FinishPacket()
if err != nil {
t.Fatal("FinishPacket failed:", err.Error())
}
if bytes.Compare(memBuf.Bytes(), []byte{1, 1, 0, 11, 0, 0, 1, 0, 2, 3, 4}) != 0 {
t.Fatalf("Written buffer has invalid content: %v", memBuf.Bytes())
}
buf.BeginPacket(2)
wrote, err = buf.Write([]byte{3, 4, 5, 6})
if err != nil {
t.Fatal("Write failed:", err.Error())
}
if wrote != 4 {
t.Fatalf("Write returned invalid value of written bytes %d", wrote)
}
err = buf.FinishPacket()
if err != nil {
t.Fatal("FinishPacket failed:", err.Error())
}
expectedBuf := []byte{
1, 1, 0, 11, 0, 0, 1, 0, 2, 3, 4, // packet 1
2, 0, 0, 11, 0, 0, 1, 0, 3, 4, 5, // packet 2
2, 1, 0, 9, 0, 0, 2, 0, 6, // packet 3
}
if bytes.Compare(memBuf.Bytes(), expectedBuf) != 0 {
t.Fatalf("Written buffer has invalid content: %v", memBuf.Bytes())
}
}
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