hunk.code_window:                             createMessage={Utils.localizeMessage('edit_channel_header.editHeader', 'Edit the Channel Header...')}
                               previewMessageLink={Utils.localizeMessage('edit_channel_header.previewHeader', 'Edit Header')}
                               handlePostError={this.handlePostError}
                               id='edit_textbox'
                               ref='editChannelHeaderTextbox'
                           />
                           <br/>
                           {serverError}
  
hunk.labels: keep keep keep keep add keep keep keep
hunk.after_edit:                             characterLimit={1024}
  
hunk.file_path: webapp/components/edit_channel_header_modal.jsx
hunk.type: add
file: /*-
   * 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"
  	"strings"
  	"testing"
  )
  
  func TestBase64URLEncode(t *testing.T) {
  	// Test arrays with various sizes
  	if base64URLEncode([]byte{}) != "" {
  		t.Error("failed to encode empty array")
  	}
  
  	if base64URLEncode([]byte{0}) != "AA" {
  		t.Error("failed to encode [0x00]")
  	}
  
  	if base64URLEncode([]byte{0, 1}) != "AAE" {
  		t.Error("failed to encode [0x00, 0x01]")
  	}
  
  	if base64URLEncode([]byte{0, 1, 2}) != "AAEC" {
  		t.Error("failed to encode [0x00, 0x01, 0x02]")
  	}
  
  	if base64URLEncode([]byte{0, 1, 2, 3}) != "AAECAw" {
  		t.Error("failed to encode [0x00, 0x01, 0x02, 0x03]")
  	}
  }
  
  func TestBase64URLDecode(t *testing.T) {
  	// Test arrays with various sizes
  	val, err := base64URLDecode("")
  	if err != nil || !bytes.Equal(val, []byte{}) {
  		t.Error("failed to decode empty array")
  	}
  
  	val, err = base64URLDecode("AA")
  	if err != nil || !bytes.Equal(val, []byte{0}) {
  		t.Error("failed to decode [0x00]")
  	}
  
  	val, err = base64URLDecode("AAE")
  	if err != nil || !bytes.Equal(val, []byte{0, 1}) {
  		t.Error("failed to decode [0x00, 0x01]")
  	}
  
  	val, err = base64URLDecode("AAEC")
  	if err != nil || !bytes.Equal(val, []byte{0, 1, 2}) {
  		t.Error("failed to decode [0x00, 0x01, 0x02]")
  	}
  
  	val, err = base64URLDecode("AAECAw")
  	if err != nil || !bytes.Equal(val, []byte{0, 1, 2, 3}) {
  		t.Error("failed to decode [0x00, 0x01, 0x02, 0x03]")
  	}
  }
  
  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.Compare(output, original) != 0 {
  		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")
  	}
  }
  
  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)
  }
  