305 lines
6.7 KiB
Go
305 lines
6.7 KiB
Go
package io
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import (
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"errors"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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// mocks io.Reader and io.Writer, always fails to Write() or Read().
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type badRW struct{}
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func (w *badRW) Write(p []byte) (int, error) {
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return 0, errors.New("it always fails")
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}
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func (w *badRW) Read(p []byte) (int, error) {
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return w.Write(p)
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}
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func TestWriteLE(t *testing.T) {
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var (
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val uint32 = 0xdeadbeef
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readval uint32
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bin = []byte{0xef, 0xbe, 0xad, 0xde}
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)
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bw := NewBufBinWriter()
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bw.WriteLE(val)
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assert.Nil(t, bw.Err)
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wrotebin := bw.Bytes()
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assert.Equal(t, wrotebin, bin)
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br := NewBinReaderFromBuf(bin)
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br.ReadLE(&readval)
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assert.Nil(t, br.Err)
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assert.Equal(t, val, readval)
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}
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func TestWriteBE(t *testing.T) {
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var (
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val uint32 = 0xdeadbeef
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readval uint32
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bin = []byte{0xde, 0xad, 0xbe, 0xef}
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)
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bw := NewBufBinWriter()
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bw.WriteBE(val)
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assert.Nil(t, bw.Err)
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wrotebin := bw.Bytes()
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assert.Equal(t, wrotebin, bin)
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br := NewBinReaderFromBuf(bin)
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br.ReadBE(&readval)
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assert.Nil(t, br.Err)
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assert.Equal(t, val, readval)
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}
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func TestWriterErrHandling(t *testing.T) {
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var badio = &badRW{}
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bw := NewBinWriterFromIO(badio)
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bw.WriteLE(uint32(0))
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assert.NotNil(t, bw.Err)
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// these should work (without panic), preserving the Err
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bw.WriteLE(uint32(0))
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bw.WriteBE(uint32(0))
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bw.WriteVarUint(0)
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bw.WriteBytes([]byte{0x55, 0xaa})
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bw.WriteString("neo")
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assert.NotNil(t, bw.Err)
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}
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func TestReaderErrHandling(t *testing.T) {
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var (
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i uint32 = 0xdeadbeef
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iorig = i
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badio = &badRW{}
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)
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br := NewBinReaderFromIO(badio)
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br.ReadLE(&i)
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assert.NotNil(t, br.Err)
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// i shouldn't change
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assert.Equal(t, i, iorig)
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// these should work (without panic), preserving the Err
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br.ReadLE(&i)
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br.ReadBE(&i)
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assert.Equal(t, i, iorig)
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val := br.ReadVarUint()
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assert.Equal(t, val, uint64(0))
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b := br.ReadBytes()
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assert.Equal(t, b, []byte{})
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s := br.ReadString()
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assert.Equal(t, s, "")
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assert.NotNil(t, br.Err)
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}
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func TestBufBinWriterErr(t *testing.T) {
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bw := NewBufBinWriter()
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bw.WriteLE(uint32(0))
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assert.Nil(t, bw.Err)
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// inject error
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bw.Err = errors.New("oopsie")
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res := bw.Bytes()
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assert.NotNil(t, bw.Err)
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assert.Nil(t, res)
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}
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func TestBufBinWriterReset(t *testing.T) {
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bw := NewBufBinWriter()
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for i := 0; i < 3; i++ {
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bw.WriteLE(uint32(i))
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assert.Nil(t, bw.Err)
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_ = bw.Bytes()
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assert.NotNil(t, bw.Err)
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bw.Reset()
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assert.Nil(t, bw.Err)
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}
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}
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func TestWriteString(t *testing.T) {
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var (
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str = "teststring"
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)
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bw := NewBufBinWriter()
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bw.WriteString(str)
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assert.Nil(t, bw.Err)
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wrotebin := bw.Bytes()
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// +1 byte for length
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assert.Equal(t, len(wrotebin), len(str)+1)
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br := NewBinReaderFromBuf(wrotebin)
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readstr := br.ReadString()
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assert.Nil(t, br.Err)
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assert.Equal(t, str, readstr)
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}
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func TestWriteVarUint1(t *testing.T) {
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var (
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val = uint64(1)
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)
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bw := NewBufBinWriter()
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bw.WriteVarUint(val)
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assert.Nil(t, bw.Err)
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buf := bw.Bytes()
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assert.Equal(t, 1, len(buf))
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br := NewBinReaderFromBuf(buf)
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res := br.ReadVarUint()
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assert.Nil(t, br.Err)
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assert.Equal(t, val, res)
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}
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func TestWriteVarUint1000(t *testing.T) {
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var (
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val = uint64(1000)
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)
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bw := NewBufBinWriter()
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bw.WriteVarUint(val)
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assert.Nil(t, bw.Err)
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buf := bw.Bytes()
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assert.Equal(t, 3, len(buf))
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assert.Equal(t, byte(0xfd), buf[0])
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br := NewBinReaderFromBuf(buf)
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res := br.ReadVarUint()
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assert.Nil(t, br.Err)
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assert.Equal(t, val, res)
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}
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func TestWriteVarUint100000(t *testing.T) {
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var (
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val = uint64(100000)
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)
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bw := NewBufBinWriter()
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bw.WriteVarUint(val)
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assert.Nil(t, bw.Err)
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buf := bw.Bytes()
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assert.Equal(t, 5, len(buf))
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assert.Equal(t, byte(0xfe), buf[0])
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br := NewBinReaderFromBuf(buf)
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res := br.ReadVarUint()
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assert.Nil(t, br.Err)
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assert.Equal(t, val, res)
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}
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func TestWriteVarUint100000000000(t *testing.T) {
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var (
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val = uint64(1000000000000)
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)
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bw := NewBufBinWriter()
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bw.WriteVarUint(val)
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assert.Nil(t, bw.Err)
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buf := bw.Bytes()
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assert.Equal(t, 9, len(buf))
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assert.Equal(t, byte(0xff), buf[0])
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br := NewBinReaderFromBuf(buf)
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res := br.ReadVarUint()
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assert.Nil(t, br.Err)
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assert.Equal(t, val, res)
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}
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type testSerializable uint16
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// EncodeBinary implements io.Serializable interface.
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func (t testSerializable) EncodeBinary(w *BinWriter) {
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w.WriteLE(t)
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}
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// DecodeBinary implements io.Serializable interface.
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func (t *testSerializable) DecodeBinary(r *BinReader) {
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r.ReadLE(t)
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}
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func TestBinWriter_WriteArray(t *testing.T) {
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var arr [3]testSerializable
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for i := range arr {
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arr[i] = testSerializable(i)
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}
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expected := []byte{3, 0, 0, 1, 0, 2, 0}
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w := NewBufBinWriter()
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w.WriteArray(arr)
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require.NoError(t, w.Err)
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require.Equal(t, expected, w.Bytes())
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w.Reset()
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w.WriteArray(arr[:])
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require.NoError(t, w.Err)
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require.Equal(t, expected, w.Bytes())
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arrS := make([]Serializable, len(arr))
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for i := range arrS {
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arrS[i] = &arr[i]
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}
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w.Reset()
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w.WriteArray(arr)
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require.NoError(t, w.Err)
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require.Equal(t, expected, w.Bytes())
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w.Reset()
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require.Panics(t, func() { w.WriteArray(1) })
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w.Reset()
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w.Err = errors.New("error")
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w.WriteArray(arr[:])
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require.Error(t, w.Err)
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require.Equal(t, w.Bytes(), []byte(nil))
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w.Reset()
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w.Err = errors.New("error")
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require.Panics(t, func() { w.WriteArray([]int{}) })
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w.Reset()
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w.Err = errors.New("error")
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require.Panics(t, func() { w.WriteArray(make(chan testSerializable)) })
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}
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func TestBinReader_ReadArray(t *testing.T) {
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data := []byte{3, 0, 0, 1, 0, 2, 0}
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elems := []testSerializable{0, 1, 2}
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r := NewBinReaderFromBuf(data)
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arrPtr := []*testSerializable{}
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r.ReadArray(&arrPtr)
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require.Equal(t, []*testSerializable{&elems[0], &elems[1], &elems[2]}, arrPtr)
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r = NewBinReaderFromBuf(data)
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arrVal := []testSerializable{}
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r.ReadArray(&arrVal)
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require.NoError(t, r.Err)
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require.Equal(t, elems, arrVal)
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r = NewBinReaderFromBuf([]byte{0})
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r.ReadArray(&arrVal)
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require.NoError(t, r.Err)
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require.Equal(t, []testSerializable{}, arrVal)
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r = NewBinReaderFromBuf([]byte{0})
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r.Err = errors.New("error")
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arrVal = ([]testSerializable)(nil)
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r.ReadArray(&arrVal)
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require.Error(t, r.Err)
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require.Equal(t, ([]testSerializable)(nil), arrVal)
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r = NewBinReaderFromBuf([]byte{0})
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r.Err = errors.New("error")
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arrPtr = ([]*testSerializable)(nil)
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r.ReadArray(&arrVal)
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require.Error(t, r.Err)
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require.Equal(t, ([]*testSerializable)(nil), arrPtr)
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r = NewBinReaderFromBuf([]byte{0})
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arrVal = []testSerializable{1, 2}
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r.ReadArray(&arrVal)
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require.NoError(t, r.Err)
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require.Equal(t, []testSerializable{}, arrVal)
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r = NewBinReaderFromBuf([]byte{0})
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r.Err = errors.New("error")
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require.Panics(t, func() { r.ReadArray(&[]*int{}) })
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r = NewBinReaderFromBuf([]byte{0})
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r.Err = errors.New("error")
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require.Panics(t, func() { r.ReadArray(&[]int{}) })
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r = NewBinReaderFromBuf([]byte{0})
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r.Err = errors.New("error")
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require.Panics(t, func() { r.ReadArray(0) })
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}
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