SharpDevelop/ICSharpCode.NRefactory.Tests/CSharp/Parser/GeneralScope/NamespaceDeclarationTests.cs

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using System;
using System.IO;
using System.Linq;
using NUnit.Framework;

namespace ICSharpCode.NRefactory.CSharp.Parser.GeneralScope
{
	[TestFixture]
	public class NamespaceDeclarationTests
	{
		[Test]
		public void SimpleNamespaceTest()
		{
			string program = "namespace TestNamespace {\n" +
				"}\n";
			NamespaceDeclaration ns = ParseUtilCSharp.ParseGlobal<NamespaceDeclaration>(program);
			Assert.AreEqual("TestNamespace", ns.Name);
		}
		
		[Test]
		public void NestedNamespaceTest()
		{
			string program = "namespace N1 {//TestNamespace\n" +
				"    namespace N2 {// Declares a namespace named N2 within N1.\n" +
				"    }\n" +
				"}\n";
			NamespaceDeclaration ns = ParseUtilCSharp.ParseGlobal<NamespaceDeclaration>(program);
			
			Assert.AreEqual("N1", ns.Name);
			
			Assert.AreEqual("N2", ns.Children.OfType<NamespaceDeclaration>().Single().Name);
		}
		
		[Test]
		public void ExternAliasTest()
		{
			string program = "extern alias X; extern alias Y; using X::System; namespace TestNamespace { extern alias Z; using Y::System; }";
			var syntaxTree = new CSharpParser().Parse(program, "code.cs");
			Assert.AreEqual(
				new Type[] {
					typeof(ExternAliasDeclaration),
					typeof(ExternAliasDeclaration),
					typeof(UsingDeclaration),
					typeof(NamespaceDeclaration)
				}, syntaxTree.Children.Select(c => c.GetType()).ToArray());
			var namespaceMembers = ((NamespaceDeclaration)syntaxTree.LastChild).Members;
			Assert.AreEqual(
				new Type[] {
					typeof(ExternAliasDeclaration),
					typeof(UsingDeclaration)
				}, namespaceMembers.Select(c => c.GetType()).ToArray());
		}
	}
}