//
// UTF7EncodingTest.cs - NUnit Test Cases for System.Text.UTF7Encoding
//
// Authors
//	Patrick Kalkman  kalkman@cistron.nl
//	Sebastien Pouliot  <sebastien@ximian.com>
//
// (C) 2003 Patrick Kalkman
// Copyright (C) 2004 Novell (http://www.novell.com)
//
 
using NUnit.Framework;
using System;
using System.Text;

namespace MonoTests.System.Text
{
        [TestFixture]
        public class UTF7EncodingTest : Assertion
        {
                [Test]
                public void TestDirectlyEncoded1() 
                {
                        // Unicode characters a-z, A-Z, 0-9 and '()_./:? are directly encoded.
                        string UniCodeString = "\u0061\u007A\u0041\u005A\u0030\u0039\u0027\u003F";
                        byte[] UTF7Bytes = null;
                        UTF7Encoding UTF7enc = new UTF7Encoding ();
                        
                        UTF7Bytes = UTF7enc.GetBytes (UniCodeString);
                        
                        Assertion.AssertEquals ("UTF7 #1", 0x61, UTF7Bytes [0]);
                        Assertion.AssertEquals ("UTF7 #2", 0x7A, UTF7Bytes [1]);
                        Assertion.AssertEquals ("UTF7 #3", 0x41, UTF7Bytes [2]);
                        Assertion.AssertEquals ("UTF7 #4", 0x5A, UTF7Bytes [3]);
                        Assertion.AssertEquals ("UTF7 #5", 0x30, UTF7Bytes [4]);
                        Assertion.AssertEquals ("UTF7 #6", 0x39, UTF7Bytes [5]);
                        Assertion.AssertEquals ("UTF7 #7", 0x27, UTF7Bytes [6]);
                        Assertion.AssertEquals ("UTF7 #8", 0x3F, UTF7Bytes [7]);
                }
        
                [Test]
                public void TestDirectlyEncoded2()
                {
                        // Unicode characters a-z, A-Z, 0-9 and '()_./:? are directly encoded.
                        string UniCodeString = "\u0061\u007A\u0041\u005A\u0030\u0039\u0027\u003F";
                        byte[] UTF7Bytes = new byte [8];
                        int Length = UniCodeString.Length;
                        UTF7Encoding UTF7enc = new UTF7Encoding ();
                        
                        int Cnt = UTF7enc.GetBytes (UniCodeString.ToCharArray(), 0, Length, UTF7Bytes, 0);
                
		        Assertion.AssertEquals ("UTF7 #1", 0x61, UTF7Bytes [0]);
                        Assertion.AssertEquals ("UTF7 #2", 0x7A, UTF7Bytes [1]);
                        Assertion.AssertEquals ("UTF7 #3", 0x41, UTF7Bytes [2]);
                        Assertion.AssertEquals ("UTF7 #4", 0x5A, UTF7Bytes [3]);
                        Assertion.AssertEquals ("UTF7 #5", 0x30, UTF7Bytes [4]);
                        Assertion.AssertEquals ("UTF7 #6", 0x39, UTF7Bytes [5]);
                        Assertion.AssertEquals ("UTF7 #7", 0x27, UTF7Bytes [6]);
                        Assertion.AssertEquals ("UTF7 #8", 0x3F, UTF7Bytes [7]);
		}
        
                [Test]
                public void TestEncodeOptionalEncoded()
                {
                        string UniCodeString = "\u0021\u0026\u002A\u003B";
                        byte[] UTF7Bytes = null;
                        
                        //Optional Characters are allowed.	
                        UTF7Encoding UTF7enc = new UTF7Encoding (true); 
                        UTF7Bytes = UTF7enc.GetBytes (UniCodeString);
                        
                        Assertion.AssertEquals ("UTF7 #1", 0x21, UTF7Bytes [0]);
                        Assertion.AssertEquals ("UTF7 #2", 0x26, UTF7Bytes [1]);
                        Assertion.AssertEquals ("UTF7 #3", 0x2A, UTF7Bytes [2]);
                        Assertion.AssertEquals ("UTF7 #4", 0x3B, UTF7Bytes [3]);
                        
                        //Optional characters are not allowed.
                        UTF7enc = new UTF7Encoding (false);
                        UTF7Bytes = UTF7enc.GetBytes (UniCodeString);
                        
                        Assertion.AssertEquals ("UTF7 #5", 0x2B, UTF7Bytes [0]);
                        Assertion.AssertEquals ("UTF7 #6", 0x41, UTF7Bytes [1]);
                        Assertion.AssertEquals ("UTF7 #7", 0x43, UTF7Bytes [2]);
                        Assertion.AssertEquals ("UTF7 #8", 0x45, UTF7Bytes [3]);
                        Assertion.AssertEquals ("UTF7 #6", 0x41, UTF7Bytes [1]);
                }
        
                [Test]
                public void TestEncodeUnicodeShifted1()
                {
                        string UniCodeString = "\u0041\u2262\u0391\u002E";
                        byte[] UTF7Bytes = null;
                        
                        UTF7Encoding UTF7enc = new UTF7Encoding();
                        UTF7Bytes = UTF7enc.GetBytes (UniCodeString);
                        
                        //"A<NOT IDENTICAL TO><ALPHA>." is encoded as A+ImIDkQ-. see RFC 1642
                        Assertion.AssertEquals ("UTF7 #1", 0x41, UTF7Bytes [0]);
                        Assertion.AssertEquals ("UTF7 #2", 0x2B, UTF7Bytes [1]);
                        Assertion.AssertEquals ("UTF7 #3", 0x49, UTF7Bytes [2]);
                        Assertion.AssertEquals ("UTF7 #4", 0x6D, UTF7Bytes [3]);
                        Assertion.AssertEquals ("UTF7 #5", 0x49, UTF7Bytes [4]);
                        Assertion.AssertEquals ("UTF7 #6", 0x44, UTF7Bytes [5]);
                        Assertion.AssertEquals ("UTF7 #7", 0x6B, UTF7Bytes [6]);
                        Assertion.AssertEquals ("UTF7 #8", 0x51, UTF7Bytes [7]);
                        Assertion.AssertEquals ("UTF7 #9", 0x2D, UTF7Bytes [8]);
                        Assertion.AssertEquals ("UTF7 #10", 0x2E, UTF7Bytes [9]);
                }
        
                [Test]
                public void TestEncodeUnicodeShifted2()
                {
                        string UniCodeString = "\u0041\u2262\u0391\u002E";
                        byte[] UTF7Bytes = new byte [10];
                        int Length = UniCodeString.Length;
                        UTF7Encoding UTF7enc = new UTF7Encoding ();
                        
                        int Cnt = UTF7enc.GetBytes (UniCodeString.ToCharArray(), 0, Length, UTF7Bytes, 0);
                        
                        //"A<NOT IDENTICAL TO><ALPHA>." is encoded as A+ImIDkQ-. see RFC 1642
                        Assertion.AssertEquals ("UTF7 #1", 0x41, UTF7Bytes [0]);
                        Assertion.AssertEquals ("UTF7 #2", 0x2B, UTF7Bytes [1]);
                        Assertion.AssertEquals ("UTF7 #3", 0x49, UTF7Bytes [2]);
                        Assertion.AssertEquals ("UTF7 #4", 0x6D, UTF7Bytes [3]);
                        Assertion.AssertEquals ("UTF7 #5", 0x49, UTF7Bytes [4]);
                        Assertion.AssertEquals ("UTF7 #6", 0x44, UTF7Bytes [5]);
                        Assertion.AssertEquals ("UTF7 #7", 0x6B, UTF7Bytes [6]);
                        Assertion.AssertEquals ("UTF7 #8", 0x51, UTF7Bytes [7]);
                        Assertion.AssertEquals ("UTF7 #9", 0x2D, UTF7Bytes [8]);
                        Assertion.AssertEquals ("UTF7 #10", 0x2E, UTF7Bytes [9]);
                }
        
		[Test]
		public void RFC1642_Example1 ()
		{
			string UniCodeString = "\u0041\u2262\u0391\u002E";
			char[] expected = UniCodeString.ToCharArray ();

			byte[] UTF7Bytes = new byte [] {0x41, 0x2B, 0x49, 0x6D, 0x49, 0x44, 0x6B,  0x51, 0x2D, 0x2E};
			UTF7Encoding UTF7enc = new UTF7Encoding ();
			char[] actual = UTF7enc.GetChars (UTF7Bytes);

			// "A+ImIDkQ-." is decoded as "A<NOT IDENTICAL TO><ALPHA>." see RFC 1642
			AssertEquals ("UTF #1", expected [0], actual [0]);
			AssertEquals ("UTF #2", expected [1], actual [1]);
			AssertEquals ("UTF #3", expected [2], actual [2]);
			AssertEquals ("UTF #4", expected [3], actual [3]);

			AssertEquals ("GetString", UniCodeString, UTF7enc.GetString (UTF7Bytes));
                }

		[Test]
		public void RFC1642_Example2 ()
		{
			string UniCodeString = "\u0048\u0069\u0020\u004D\u006F\u004D\u0020\u263A\u0021";
			char[] expected = UniCodeString.ToCharArray ();

			byte[] UTF7Bytes = new byte[] { 0x48, 0x69, 0x20, 0x4D, 0x6F, 0x4D, 0x20, 0x2B, 0x4A, 0x6A, 0x6F, 0x41, 0x49, 0x51, 0x2D };

			UTF7Encoding UTF7enc = new UTF7Encoding ();
			char[] actual = UTF7enc.GetChars (UTF7Bytes);

			// "Hi Mom +Jjo-!" is decoded as "Hi Mom <WHITE SMILING FACE>!"
			AssertEquals ("UTF #1", expected [0], actual [0]);
			AssertEquals ("UTF #2", expected [1], actual [1]);
			AssertEquals ("UTF #3", expected [2], actual [2]);
			AssertEquals ("UTF #4", expected [3], actual [3]);
			AssertEquals ("UTF #5", expected [4], actual [4]);
			AssertEquals ("UTF #6", expected [5], actual [5]);
			AssertEquals ("UTF #7", expected [6], actual [6]);
			AssertEquals ("UTF #8", expected [7], actual [7]);
			AssertEquals ("UTF #9", expected [8], actual [8]);

			AssertEquals ("GetString", UniCodeString, UTF7enc.GetString (UTF7Bytes));
		}

		[Test]
		public void RFC1642_Example3 ()
		{
			string UniCodeString = "\u65E5\u672C\u8A9E";
			char[] expected = UniCodeString.ToCharArray ();

			byte[] UTF7Bytes = new byte[] { 0x2B, 0x5A, 0x65, 0x56, 0x6E, 0x4C, 0x49, 0x71, 0x65, 0x2D };

			UTF7Encoding UTF7enc = new UTF7Encoding ();
			char[] actual = UTF7enc.GetChars (UTF7Bytes);

			// "+ZeVnLIqe-" is decoded as Japanese "nihongo"
			AssertEquals ("UTF #1", expected [0], actual [0]);
			AssertEquals ("UTF #2", expected [1], actual [1]);
			AssertEquals ("UTF #3", expected [2], actual [2]);

			AssertEquals ("GetString", UniCodeString, UTF7enc.GetString (UTF7Bytes));
		}

		[Test]
		public void RFC1642_Example4 ()
		{
			string UniCodeString = "\u0049\u0074\u0065\u006D\u0020\u0033\u0020\u0069\u0073\u0020\u00A3\u0031\u002E";
			char[] expected = UniCodeString.ToCharArray ();

			byte[] UTF7Bytes = new byte[] { 0x49, 0x74, 0x65, 0x6D, 0x20, 0x33, 0x20, 0x69, 0x73, 0x20, 0x2B, 0x41, 0x4B, 0x4D, 0x2D, 0x31, 0x2E };

			UTF7Encoding UTF7enc = new UTF7Encoding ();
			char[] actual = UTF7enc.GetChars (UTF7Bytes);

			// "Item 3 is +AKM-1." is decoded as "Item 3 is <POUND SIGN>1."
			AssertEquals ("UTF #1", expected [0], actual [0]);
			AssertEquals ("UTF #2", expected [1], actual [1]);
			AssertEquals ("UTF #3", expected [2], actual [2]);
			AssertEquals ("UTF #4", expected [3], actual [3]);
			AssertEquals ("UTF #5", expected [4], actual [4]);
			AssertEquals ("UTF #6", expected [5], actual [5]);
			AssertEquals ("UTF #7", expected [6], actual [6]);
			AssertEquals ("UTF #8", expected [7], actual [7]);
			AssertEquals ("UTF #9", expected [8], actual [8]);
			AssertEquals ("UTF #10", expected [9], actual [9]);
			AssertEquals ("UTF #11", expected [10], actual [10]);
			AssertEquals ("UTF #12", expected [11], actual [11]);
			AssertEquals ("UTF #13", expected [12], actual [12]);

			AssertEquals ("GetString", UniCodeString, UTF7enc.GetString (UTF7Bytes));
		}

                [Test]
                public void TestMaxCharCount()
                {
                        UTF7Encoding UTF7enc = new UTF7Encoding ();
                        Assertion.AssertEquals ("UTF #1", 50, UTF7enc.GetMaxCharCount(50));
                }
        
                [Test]
#if NET_2_0
                [Category ("NotWorking")]
#endif
                public void TestMaxByteCount()
                {
                        UTF7Encoding UTF7enc = new UTF7Encoding ();
#if NET_2_0
                        Assertion.AssertEquals ("UTF #1", 152, UTF7enc.GetMaxByteCount(50));
#else
                        Assertion.AssertEquals ("UTF #1", 136, UTF7enc.GetMaxByteCount(50));
#endif
                }

		[Test]
		[ExpectedException (typeof (ArgumentException))]
		[Category ("NotDotNet")] // MS bug
		public void Bug77315 ()
		{
			string s = new UTF7Encoding ().GetString (
				Encoding.ASCII.GetBytes ("+2AA-"));
		}
        }
}