/* ====================================================================
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You 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.
==================================================================== */
namespace TestCases.HSSF.Record{
using System;
using System.IO;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using NPOI.HSSF.Record;
using NPOI.Util;
using System.Text;
/**
* A Record Input Stream derivative that makes access to byte arrays used in the
* test cases work a bit easier.
* Creates the sream and moves to the first record.
*
* @author Jason Height (jheight at apache.org)
*/
public class TestcaseRecordInputStream {
private TestcaseRecordInputStream() {
// no instances of this class
}
/**
* Prepends a mock record identifier to the supplied data and opens a record input stream
*/
public static RecordInputStream CreateWithFakeSid(byte[] data) {
return Create(-5555, data);
}
public static RecordInputStream Create(int sid, byte[] data) {
return Create(MergeDataAndSid(sid, data.Length, data));
}
/**
* First 4 bytes of <tt>data</tt> are assumed to be record identifier and length. The supplied
* <tt>data</tt> can contain multiple records (sequentially encoded in the same way)
*/
public static RecordInputStream Create(byte[] data) {
Stream inputStream = new MemoryStream(data);
RecordInputStream result = new RecordInputStream(inputStream);
result.NextRecord();
return result;
}
/**
* Convenience constructor
*/
// public TestcaseRecordInputStream(int sid, byte[] data)
// {
// super(new ByteArrayInputStream(mergeDataAndSid(sid, data.length, data)));
// nextRecord();
// }
// public TestcaseRecordInputStream(short sid, short length, byte[] data)
// {
// super(new ByteArrayInputStream(mergeDataAndSid(sid, length, data)));
// nextRecord();
// }
public static byte[] MergeDataAndSid(int sid, int length, byte[] data)
{
byte[] result = new byte[data.Length + 4];
LittleEndian.PutUShort(result, 0, sid);
LittleEndian.PutUShort(result, 2, length);
Array.Copy(data, 0, result, 4, data.Length);
return result;
}
/**
* Confirms data sections are equal
* @param msgPrefix message prefix to be displayed in case of failure
* @param expectedData - just raw data (without ushort sid, ushort size)
* @param actualRecordBytes this includes 4 prefix bytes (sid & size)
*/
public static void ConfirmRecordEncoding(String msgPrefix, int expectedSid, byte[] expectedData, byte[] actualRecordBytes)
{
int expectedDataSize = expectedData.Length;
Assert.AreEqual(actualRecordBytes.Length - 4, expectedDataSize,"Size of encode data mismatch");
Assert.AreEqual(expectedSid, LittleEndian.GetShort(actualRecordBytes, 0));
Assert.AreEqual(expectedDataSize, LittleEndian.GetShort(actualRecordBytes, 2));
for (int i = 0; i < expectedDataSize; i++)
if (expectedData[i] != actualRecordBytes[i + 4])
{
StringBuilder sb = new StringBuilder(64);
if (msgPrefix != null)
{
sb.Append(msgPrefix).Append(": ");
}
sb.Append("At offset ").Append(i);
sb.Append(": expected ").Append(HexDump.ByteToHex(expectedData[i]));
sb.Append(" but found ").Append(HexDump.ByteToHex(actualRecordBytes[i + 4]));
throw new AssertFailedException(sb.ToString());
}
}
/**
* Confirms data sections are equal
* @param expectedData - just raw data (without sid or size short ints)
* @param actualRecordBytes this includes 4 prefix bytes (sid & size)
*/
public static void ConfirmRecordEncoding(int expectedSid, byte[] expectedData, byte[] actualRecordBytes)
{
ConfirmRecordEncoding(null, expectedSid, expectedData, actualRecordBytes);
}
}
}
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