customlexertests.cs

来自「SharpDevelop2.0.0 c#开发免费工具」· CS 代码 · 共 102 行

// <file>
//     <copyright see="prj:///doc/copyright.txt"/>
//     <license see="prj:///doc/license.txt"/>
//     <owner name="Daniel Grunwald" email="[e-mail]"/>
//     <version>$Revision$</version>
// </file>

using System;
using System.IO;
using NUnit.Framework;
using ICSharpCode.NRefactory.Parser;
using ICSharpCode.NRefactory.Parser.CSharp;
using ICSharpCode.NRefactory.PrettyPrinter;

namespace ICSharpCode.NRefactory.Tests.Lexer.CSharp
{
	[TestFixture]
	public sealed class CustomLexerTests
	{
		ILexer GenerateLexer(StringReader sr)
		{
			return ParserFactory.CreateLexer(SupportedLanguage.CSharp, sr);
		}
		
		[Test]
		public void TestEmptyBlock()
		{
			ILexer lexer = GenerateLexer(new StringReader("{}+"));
			Assert.AreEqual(Tokens.OpenCurlyBrace, lexer.NextToken().kind);
			Assert.AreEqual(Tokens.CloseCurlyBrace, lexer.NextToken().kind);
			Assert.AreEqual(Tokens.Plus, lexer.NextToken().kind);
			Assert.AreEqual(Tokens.EOF, lexer.NextToken().kind);
		}
		
		[Test]
		public void TestIdentifier()
		{
			ILexer lexer = GenerateLexer(new StringReader("a_Bc05"));
			Token t = lexer.NextToken();
			Assert.AreEqual(Tokens.Identifier, t.kind);
			Assert.AreEqual("a_Bc05", t.val);
		}
		
		[Test]
		public void TestSkippedEmptyBlock()
		{
			ILexer lexer = GenerateLexer(new StringReader("{}+"));
			Assert.AreEqual(Tokens.OpenCurlyBrace, lexer.NextToken().kind);
			lexer.NextToken();
			lexer.SkipCurrentBlock();
			Assert.AreEqual(Tokens.CloseCurlyBrace, lexer.LookAhead.kind);
			Assert.AreEqual(Tokens.Plus, lexer.NextToken().kind);
			Assert.AreEqual(Tokens.EOF, lexer.NextToken().kind);
		}
		
		[Test]
		public void TestSkippedNonEmptyBlock()
		{
			ILexer lexer = GenerateLexer(new StringReader("{ TestMethod('}'); /* }}} */ while(1) {break;} }+"));
			Assert.AreEqual(Tokens.OpenCurlyBrace, lexer.NextToken().kind);
			lexer.NextToken();
			lexer.SkipCurrentBlock();
			Assert.AreEqual(Tokens.CloseCurlyBrace, lexer.LookAhead.kind);
			Assert.AreEqual(Tokens.Plus, lexer.NextToken().kind);
			Assert.AreEqual(Tokens.EOF, lexer.NextToken().kind);
		}
		
		[Test]
		public void TestSkippedNonEmptyBlockWithPeek()
		{
			ILexer lexer = GenerateLexer(new StringReader("{ TestMethod(\"}\"); // }}}\n" +
			                                              "while(1) {break;} }+"));
			Assert.AreEqual(Tokens.OpenCurlyBrace, lexer.NextToken().kind);
			lexer.NextToken();
			lexer.StartPeek();
			lexer.Peek();
			lexer.Peek();
			lexer.Peek();
			lexer.SkipCurrentBlock();
			Assert.AreEqual(Tokens.CloseCurlyBrace, lexer.LookAhead.kind);
			Assert.AreEqual(Tokens.Plus, lexer.NextToken().kind);
			Assert.AreEqual(Tokens.EOF, lexer.NextToken().kind);
		}
		
		[Test]
		public void TestSkippedEmptyBlockWithPeek()
		{
			ILexer lexer = GenerateLexer(new StringReader("{}+"));
			Assert.AreEqual(Tokens.OpenCurlyBrace, lexer.NextToken().kind);
			lexer.NextToken();
			lexer.StartPeek();
			lexer.Peek();
			lexer.Peek();
			lexer.Peek();
			lexer.SkipCurrentBlock();
			Assert.AreEqual(Tokens.CloseCurlyBrace, lexer.LookAhead.kind);
			Assert.AreEqual(Tokens.Plus, lexer.NextToken().kind);
			Assert.AreEqual(Tokens.EOF, lexer.NextToken().kind);
		}
	}
}