SharpDevelop/src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit.Tests/Document/TextUtilitiesTests.cs

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
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// software and associated documentation files (the "Software"), to deal in the Software
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// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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using System;
#if NREFACTORY
using ICSharpCode.NRefactory.Editor;
#endif
using NUnit.Framework;

namespace ICSharpCode.AvalonEdit.Document
{
	[TestFixture]
	public class TextUtilitiesTests
	{
		#region GetWhitespaceAfter
		[Test]
		public void TestGetWhitespaceAfter()
		{
			Assert.AreEqual(new SimpleSegment(2, 3), TextUtilities.GetWhitespaceAfter(new StringTextSource("a \t \tb"), 2));
		}
		
		[Test]
		public void TestGetWhitespaceAfterDoesNotSkipNewLine()
		{
			Assert.AreEqual(new SimpleSegment(2, 3), TextUtilities.GetWhitespaceAfter(new StringTextSource("a \t \tb"), 2));
		}
		
		[Test]
		public void TestGetWhitespaceAfterEmptyResult()
		{
			Assert.AreEqual(new SimpleSegment(2, 0), TextUtilities.GetWhitespaceAfter(new StringTextSource("a b"), 2));
		}
		
		[Test]
		public void TestGetWhitespaceAfterEndOfString()
		{
			Assert.AreEqual(new SimpleSegment(2, 0), TextUtilities.GetWhitespaceAfter(new StringTextSource("a "), 2));
		}
		
		[Test]
		public void TestGetWhitespaceAfterUntilEndOfString()
		{
			Assert.AreEqual(new SimpleSegment(2, 3), TextUtilities.GetWhitespaceAfter(new StringTextSource("a \t \t"), 2));
		}
		#endregion
		
		#region GetWhitespaceBefore
		[Test]
		public void TestGetWhitespaceBefore()
		{
			Assert.AreEqual(new SimpleSegment(1, 3), TextUtilities.GetWhitespaceBefore(new StringTextSource("a\t \t b"), 4));
		}
		
		[Test]
		public void TestGetWhitespaceBeforeDoesNotSkipNewLine()
		{
			Assert.AreEqual(new SimpleSegment(2, 1), TextUtilities.GetWhitespaceBefore(new StringTextSource("a\n b"), 3));
		}
		
		[Test]
		public void TestGetWhitespaceBeforeEmptyResult()
		{
			Assert.AreEqual(new SimpleSegment(2, 0), TextUtilities.GetWhitespaceBefore(new StringTextSource(" a b"), 2));
		}
		
		[Test]
		public void TestGetWhitespaceBeforeStartOfString()
		{
			Assert.AreEqual(new SimpleSegment(0, 0), TextUtilities.GetWhitespaceBefore(new StringTextSource(" a"), 0));
		}
		
		[Test]
		public void TestGetWhitespaceBeforeUntilStartOfString()
		{
			Assert.AreEqual(new SimpleSegment(0, 2), TextUtilities.GetWhitespaceBefore(new StringTextSource(" \t a"), 2));
		}
		#endregion
	}
}