187 lines
4.4 KiB
Go
187 lines
4.4 KiB
Go
// Copyright 2019 The ebml-go authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ebml
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import (
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"bytes"
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"io"
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"testing"
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"git.gammaspectra.live/WeebDataHoarder/ebml-go/internal/errs"
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)
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func TestLacer(t *testing.T) {
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cases := map[string]struct {
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newLacer func(io.Writer) Lacer
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frames [][]byte
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b []byte
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err error
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}{
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"NoLaceEmpty": {
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newLacer: NewNoLacer,
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frames: [][]byte{},
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b: []byte{},
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err: nil,
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},
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"NoLaceTooMany": {
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newLacer: NewNoLacer,
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frames: make([][]byte, 2),
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b: []byte{},
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err: ErrTooManyFrames,
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},
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"Xiph": {
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newLacer: NewXiphLacer,
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frames: [][]byte{
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bytes.Repeat([]byte{0xAA}, 256),
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bytes.Repeat([]byte{0xCC}, 16),
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bytes.Repeat([]byte{0x55}, 8),
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},
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b: append(
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[]byte{
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0x02,
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0xFF, 0x01, // 256 bytes
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0x10, // 16 bytes
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},
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bytes.Join(
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[][]byte{
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bytes.Repeat([]byte{0xAA}, 256),
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bytes.Repeat([]byte{0xCC}, 16),
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bytes.Repeat([]byte{0x55}, 8)}, []byte{})...),
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err: nil,
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},
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"XiphEmpty": {
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newLacer: NewXiphLacer,
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frames: [][]byte{},
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b: []byte{},
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err: nil,
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},
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"XiphTooLong": {
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newLacer: NewXiphLacer,
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frames: make([][]byte, 256),
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b: nil,
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err: ErrTooManyFrames,
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},
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"Fixed": {
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newLacer: NewFixedLacer,
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frames: [][]byte{
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bytes.Repeat([]byte{0xAA}, 16),
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bytes.Repeat([]byte{0xCC}, 16),
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bytes.Repeat([]byte{0x55}, 16),
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},
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b: append(
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[]byte{
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0x02,
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},
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bytes.Join(
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[][]byte{
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bytes.Repeat([]byte{0xAA}, 16),
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bytes.Repeat([]byte{0xCC}, 16),
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bytes.Repeat([]byte{0x55}, 16),
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}, []byte{})...),
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err: nil,
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},
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"FixedEmpty": {
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newLacer: NewFixedLacer,
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frames: [][]byte{},
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b: []byte{},
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err: nil,
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},
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"FixedUneven": {
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newLacer: NewFixedLacer,
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frames: [][]byte{
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bytes.Repeat([]byte{0xAA}, 16),
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bytes.Repeat([]byte{0xCC}, 16),
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bytes.Repeat([]byte{0x55}, 15),
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},
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b: nil,
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err: ErrUnevenFixedLace,
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},
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"FixedTooLong": {
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newLacer: NewFixedLacer,
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frames: make([][]byte, 256),
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b: nil,
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err: ErrTooManyFrames,
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},
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"EBML": {
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newLacer: NewEBMLLacer,
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frames: [][]byte{
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bytes.Repeat([]byte{0xAA}, 800),
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bytes.Repeat([]byte{0xCC}, 500),
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bytes.Repeat([]byte{0x55}, 100),
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},
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b: append(
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[]byte{
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0x02,
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0x43, 0x20, // 800 bytes
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0x5E, 0xD3, // 500 bytes
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},
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bytes.Join(
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[][]byte{
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bytes.Repeat([]byte{0xAA}, 800),
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bytes.Repeat([]byte{0xCC}, 500),
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bytes.Repeat([]byte{0x55}, 100),
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}, []byte{})...),
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err: nil,
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},
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"EBMLEmpty": {
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newLacer: NewEBMLLacer,
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frames: [][]byte{},
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b: []byte{},
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err: nil,
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},
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"EBMLTooLong": {
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newLacer: NewEBMLLacer,
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frames: make([][]byte, 256),
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b: nil,
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err: ErrTooManyFrames,
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},
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}
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for name, c := range cases {
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t.Run(name, func(t *testing.T) {
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var buf bytes.Buffer
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l := c.newLacer(&buf)
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err := l.Write(c.frames)
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if !errs.Is(err, c.err) {
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t.Fatalf("Expected error: '%v', got: '%v'", c.err, err)
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}
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if !bytes.Equal(c.b, buf.Bytes()) {
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t.Errorf("Expected data: %v, \n got: %v", c.b, buf.Bytes())
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}
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})
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}
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}
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func TestLacer_WriterError(t *testing.T) {
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lacers := map[string]struct {
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frames [][]byte
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newLacer func(io.Writer) Lacer
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n int
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}{
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"NoLacer": {[][]byte{{0x01, 0x02}}, NewNoLacer, 3},
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"XiphLacer": {[][]byte{{0x01}, {0x02}}, NewXiphLacer, 4},
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"FixedLacer": {[][]byte{{0x01}, {0x02}}, NewFixedLacer, 3},
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"EBMLLacer": {[][]byte{{0x01}, {0x02}}, NewEBMLLacer, 4},
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}
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for name, c := range lacers {
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t.Run(name, func(t *testing.T) {
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for l := 0; l < c.n-1; l++ {
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lacer := c.newLacer(&limitedDummyWriter{limit: l})
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if err := lacer.Write(c.frames); !errs.Is(err, bytes.ErrTooLarge) {
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t.Errorf("Expected error against too large data (Writer size limit: %d): '%v', got '%v'", l, bytes.ErrTooLarge, err)
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}
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}
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})
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}
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}
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