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//
// UnicodeEncodingTest.cs - NUnit Test Cases for System.Text.UnicodeEncoding
//
// Author:
// Patrick Kalkman kalkman@cistron.nl
//
// (C) 2003 Patrick Kalkman
//
using NUnit.Framework;
using System;
using System.Text;
namespace MonoTests.System.Text
{
[TestFixture]
public class UnicodeEncodingTest
{
[Test]
public void IsBrowserDisplay ()
{
UnicodeEncoding enc = new UnicodeEncoding ();
Assert.IsFalse (enc.IsBrowserDisplay);
}
[Test]
public void IsBrowserSave ()
{
UnicodeEncoding enc = new UnicodeEncoding ();
Assert.IsTrue (enc.IsBrowserSave);
}
[Test]
public void IsMailNewsDisplay ()
{
UnicodeEncoding enc = new UnicodeEncoding ();
Assert.IsFalse (enc.IsMailNewsDisplay);
}
[Test]
public void IsMailNewsSave ()
{
UnicodeEncoding enc = new UnicodeEncoding ();
Assert.IsFalse (enc.IsMailNewsSave);
}
[Test]
public void TestEncodingGetBytes1()
{
//pi and sigma in unicode
string Unicode = "\u03a0\u03a3";
byte[] UniBytes;
UnicodeEncoding UnicodeEnc = new UnicodeEncoding (); //little-endian
UniBytes = UnicodeEnc.GetBytes (Unicode);
Assert.AreEqual (0xA0, UniBytes [0], "Uni #1");
Assert.AreEqual (0x03, UniBytes [1], "Uni #2");
Assert.AreEqual (0xA3, UniBytes [2], "Uni #3");
Assert.AreEqual (0x03, UniBytes [3], "Uni #4");
}
[Test]
public void TestEncodingGetBytes2()
{
//pi and sigma in unicode
string Unicode = "\u03a0\u03a3";
byte[] UniBytes;
UnicodeEncoding UnicodeEnc = new UnicodeEncoding (true, true); //big-endian
UniBytes = UnicodeEnc.GetBytes (Unicode);
Assert.AreEqual (0x03, UniBytes [0], "Uni #1");
Assert.AreEqual (0xA0, UniBytes [1], "Uni #2");
Assert.AreEqual (0x03, UniBytes [2], "Uni #3");
Assert.AreEqual (0xA3, UniBytes [3], "Uni #4");
}
[Test]
public void TestEncodingGetBytes3()
{
//pi and sigma in unicode
string Unicode = "\u03a0\u03a3";
byte[] UniBytes = new byte [4];
UnicodeEncoding UnicodeEnc = new UnicodeEncoding (); //little-endian
int Cnt = UnicodeEnc.GetBytes (Unicode.ToCharArray(), 0, Unicode.Length, UniBytes, 0);
Assert.AreEqual (4, Cnt, "Uni #1");
Assert.AreEqual (0xA0, UniBytes [0], "Uni #2");
Assert.AreEqual (0x03, UniBytes [1], "Uni #3");
Assert.AreEqual (0xA3, UniBytes [2], "Uni #4");
Assert.AreEqual (0x03, UniBytes [3], "Uni #5");
}
[Test]
public void TestEncodingDecodingGetBytes1()
{
//pi and sigma in unicode
string Unicode = "\u03a0\u03a3";
UnicodeEncoding UnicodeEnc = new UnicodeEncoding (); //little-endian
//Encode the unicode string.
byte[] UniBytes = UnicodeEnc.GetBytes (Unicode);
//Decode the bytes to a unicode char array.
char[] UniChars = UnicodeEnc.GetChars (UniBytes);
string Result = new string(UniChars);
Assert.AreEqual (Unicode, Result, "Uni #1");
}
[Test]
public void TestEncodingDecodingGetBytes2()
{
//pi and sigma in unicode
string Unicode = "\u03a0\u03a3";
UnicodeEncoding UnicodeEnc = new UnicodeEncoding (true, true); //big-endian
//Encode the unicode string.
byte[] UniBytes = UnicodeEnc.GetBytes (Unicode);
//Decode the bytes to a unicode char array.
char[] UniChars = UnicodeEnc.GetChars (UniBytes);
string Result = new string(UniChars);
Assert.AreEqual (Unicode, Result, "Uni #1");
}
[Test]
public void TestEncodingGetCharCount ()
{
byte[] b = new byte[] {255, 254, 115, 0, 104, 0, 105, 0};
UnicodeEncoding encoding = new UnicodeEncoding ();
Assert.AreEqual (3, encoding.GetCharCount (b, 2, b.Length - 2),
"GetCharCount #1");
}
[Test]
public void TestPreamble1()
{
//litle-endian with byte order mark.
UnicodeEncoding UnicodeEnc = new UnicodeEncoding (false, true);
byte[] PreAmble = UnicodeEnc.GetPreamble();
Assert.AreEqual (0xFF, PreAmble [0], "Uni #1");
Assert.AreEqual (0xFE, PreAmble [1], "Uni #2");
}
[Test]
public void TestPreamble2()
{
//big-endian with byte order mark.
UnicodeEncoding UnicodeEnc = new UnicodeEncoding (true, true);
byte[] PreAmble = UnicodeEnc.GetPreamble();
Assert.AreEqual (0xFE, PreAmble [0], "Uni #1");
Assert.AreEqual (0xFF, PreAmble [1], "Uni #2");
}
[Test]
public void TestPreamble3()
{
//little-endian without byte order mark.
UnicodeEncoding UnicodeEnc = new UnicodeEncoding (false, false);
byte[] PreAmble = UnicodeEnc.GetPreamble();
Assert.AreEqual (0, PreAmble.Length, "Uni #1");
}
[Test]
public void TestMaxCharCount()
{
UnicodeEncoding UnicodeEnc = new UnicodeEncoding ();
Assert.AreEqual (26, UnicodeEnc.GetMaxCharCount(50), "UTF #1");
Assert.AreEqual (27, UnicodeEnc.GetMaxCharCount(51), "UTF #2");
}
[Test]
public void TestMaxByteCount()
{
UnicodeEncoding UnicodeEnc = new UnicodeEncoding ();
Assert.AreEqual (102, UnicodeEnc.GetMaxByteCount(50), "UTF #1");
}
[Test]
public void ZeroLengthArrays ()
{
UnicodeEncoding encoding = new UnicodeEncoding ();
encoding.GetCharCount (new byte [0]);
encoding.GetChars (new byte [0]);
encoding.GetCharCount (new byte [0], 0, 0);
encoding.GetChars (new byte [0], 0, 0);
encoding.GetChars (new byte [0], 0, 0, new char [0], 0);
encoding.GetByteCount (new char [0]);
encoding.GetBytes (new char [0]);
encoding.GetByteCount (new char [0], 0, 0);
encoding.GetBytes (new char [0], 0, 0);
encoding.GetBytes (new char [0], 0, 0, new byte [0], 0);
encoding.GetByteCount ("");
encoding.GetBytes ("");
}
[Test]
public void ByteOrderMark ()
{
string littleEndianString = "\ufeff\u0042\u004f\u004d";
string bigEndianString = "\ufffe\u4200\u4f00\u4d00";
byte [] littleEndianBytes = new byte [] {0xff, 0xfe, 0x42, 0x00, 0x4f, 0x00, 0x4d, 0x00};
byte [] bigEndianBytes = new byte [] {0xfe, 0xff, 0x00, 0x42, 0x00, 0x4f, 0x00, 0x4d};
UnicodeEncoding encoding;
encoding = new UnicodeEncoding (false, true);
Assert.AreEqual (encoding.GetBytes (littleEndianString), littleEndianBytes, "BOM #1");
Assert.AreEqual (encoding.GetBytes (bigEndianString), bigEndianBytes, "BOM #2");
Assert.AreEqual (encoding.GetString (littleEndianBytes), littleEndianString, "BOM #3");
Assert.AreEqual (encoding.GetString (bigEndianBytes), bigEndianString, "BOM #4");
encoding = new UnicodeEncoding (true, true);
Assert.AreEqual (encoding.GetBytes (littleEndianString), bigEndianBytes, "BOM #5");
Assert.AreEqual (encoding.GetBytes (bigEndianString), littleEndianBytes, "BOM #6");
Assert.AreEqual (encoding.GetString (littleEndianBytes), bigEndianString, "BOM #7");
Assert.AreEqual (encoding.GetString (bigEndianBytes), littleEndianString, "BOM #8");
}
[Test]
public void GetString_Odd_Count_0 ()
{
byte [] array = new byte [3];
string s = Encoding.Unicode.GetString (array, 0, 3);
Assert.AreEqual (0, (int) s [0], "0");
Assert.AreEqual (2, s.Length, "Length");
Assert.AreEqual (65533, (int) s [1], "1");
}
[Test]
public void GetString_Odd_Count_ff ()
{
byte [] array = new byte [3] { 0xff, 0xff, 0xff };
string s = Encoding.Unicode.GetString (array, 0, 3);
Assert.AreEqual (65535, (int) s [0], "0");
Assert.AreEqual (2, s.Length, "Length");
Assert.AreEqual (65533, (int) s [1], "1");
}
[Test]
public void GetMaxByteCountIncludesBOM ()
{
Assert.AreEqual (2, Encoding.Unicode.GetMaxByteCount (0), "#1");
Assert.AreEqual (4, Encoding.Unicode.GetMaxByteCount (1), "#2");
Assert.AreEqual (6, Encoding.Unicode.GetMaxByteCount (2), "#3");
Assert.AreEqual (10, Encoding.Unicode.GetMaxByteCount (4), "#4");
Assert.AreEqual (20, Encoding.Unicode.GetMaxByteCount (9), "#5");
Assert.AreEqual (22, Encoding.Unicode.GetMaxByteCount (10), "#6");
}
[Test]
public void GetMaxCharCountRoundsCorrectly ()
{
Assert.AreEqual (1, Encoding.Unicode.GetMaxCharCount (0), "#1");
Assert.AreEqual (2, Encoding.Unicode.GetMaxCharCount (1), "#2");
Assert.AreEqual (2, Encoding.Unicode.GetMaxCharCount (2), "#3");
Assert.AreEqual (3, Encoding.Unicode.GetMaxCharCount (4), "#4");
Assert.AreEqual (6, Encoding.Unicode.GetMaxCharCount (9), "#5");
Assert.AreEqual (6, Encoding.Unicode.GetMaxCharCount (10), "#6");
}
}
}
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