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encoding_test.go
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encoding_test.go
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/*-
* Copyright 2014 Square Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jose
import (
"bytes"
"crypto/rand"
"io"
"strings"
"testing"
)
func TestDeflateRoundtrip(t *testing.T) {
original := []byte("Lorem ipsum dolor sit amet")
compressed, err := deflate(original)
if err != nil {
panic(err)
}
output, err := inflate(compressed)
if err != nil {
panic(err)
}
if !bytes.Equal(output, original) {
t.Error("Input and output do not match")
}
}
func TestInvalidCompression(t *testing.T) {
_, err := compress("XYZ", []byte{})
if err == nil {
t.Error("should not accept invalid algorithm")
}
_, err = decompress("XYZ", []byte{})
if err == nil {
t.Error("should not accept invalid algorithm")
}
_, err = decompress(DEFLATE, []byte{1, 2, 3, 4})
if err == nil {
t.Error("should not accept invalid data")
}
}
// TestLargeZip tests that we can decompress a large input, so long as its
// compression ratio is reasonable.
func TestLargeZip(t *testing.T) {
input := new(bytes.Buffer)
_, err := io.CopyN(input, rand.Reader, 251_000)
if err != nil {
t.Fatalf("generating input: %s", err)
}
compressed, err := compress(DEFLATE, input.Bytes())
if err != nil {
t.Errorf("compressing: %s", err)
}
t.Logf("compression ratio: %g", float64(len(input.Bytes()))/float64(len(compressed)))
_, err = decompress(DEFLATE, compressed)
if err != nil {
t.Errorf("decompressing large input with low compression ratio: %s", err)
}
}
func TestZipBomb(t *testing.T) {
input := strings.Repeat("a", 251_000)
compressed, err := compress(DEFLATE, []byte(input))
if err != nil {
t.Errorf("compressing: %s", err)
}
t.Logf("compression ratio: %d %g", len(compressed), float64(len(input))/float64(len(compressed)))
out, err := decompress(DEFLATE, compressed)
if err == nil {
t.Errorf("expected error decompressing zip bomb, got none. output size %d", len(out))
}
}
func TestByteBufferTrim(t *testing.T) {
buf := newBufferFromInt(1)
if !bytes.Equal(buf.data, []byte{1}) {
t.Error("Byte buffer for integer '1' should contain [0x01]")
}
buf = newBufferFromInt(65537)
if !bytes.Equal(buf.data, []byte{1, 0, 1}) {
t.Error("Byte buffer for integer '65537' should contain [0x01, 0x00, 0x01]")
}
}
func TestFixedSizeBuffer(t *testing.T) {
data0 := []byte{}
data1 := []byte{1}
data2 := []byte{1, 2}
data3 := []byte{1, 2, 3}
data4 := []byte{1, 2, 3, 4}
buf0 := newFixedSizeBuffer(data0, 4)
buf1 := newFixedSizeBuffer(data1, 4)
buf2 := newFixedSizeBuffer(data2, 4)
buf3 := newFixedSizeBuffer(data3, 4)
buf4 := newFixedSizeBuffer(data4, 4)
if !bytes.Equal(buf0.data, []byte{0, 0, 0, 0}) {
t.Error("Invalid padded buffer for buf0")
}
if !bytes.Equal(buf1.data, []byte{0, 0, 0, 1}) {
t.Error("Invalid padded buffer for buf1")
}
if !bytes.Equal(buf2.data, []byte{0, 0, 1, 2}) {
t.Error("Invalid padded buffer for buf2")
}
if !bytes.Equal(buf3.data, []byte{0, 1, 2, 3}) {
t.Error("Invalid padded buffer for buf3")
}
if !bytes.Equal(buf4.data, []byte{1, 2, 3, 4}) {
t.Error("Invalid padded buffer for buf4")
}
}
func TestSerializeJSONRejectsNil(t *testing.T) {
defer func() {
r := recover()
if r == nil || !strings.Contains(r.(string), "nil pointer") {
t.Error("serialize function should not accept nil pointer")
}
}()
mustSerializeJSON(nil)
}
func TestFixedSizeBufferTooLarge(t *testing.T) {
defer func() {
r := recover()
if r == nil {
t.Error("should not be able to create fixed size buffer with oversized data")
}
}()
newFixedSizeBuffer(make([]byte, 2), 1)
}