SharpDevelop/ICSharpCode.NRefactory.Tests/CSharp/Parser/Expression/UnaryOperatorExpressionTests.cs

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using System;
using NUnit.Framework;

namespace ICSharpCode.NRefactory.CSharp.Parser.Expression
{
	[TestFixture]
	public class UnaryOperatorExpressionTests
	{
		void TestUnaryOperatorExpressionTest(string program, UnaryOperatorType op)
		{
			UnaryOperatorExpression uoe = ParseUtilCSharp.ParseExpression<UnaryOperatorExpression>(program);
			Assert.AreEqual(op, uoe.Operator);
			
			Assert.IsTrue(uoe.Expression is IdentifierExpression);
			Assert.AreEqual(new TextLocation(1, 1), uoe.StartLocation);
			Assert.AreEqual(new TextLocation(1, program.Length + 1), uoe.EndLocation);
		}
		
		[Test]
		public void NotTest()
		{
			TestUnaryOperatorExpressionTest("!a", UnaryOperatorType.Not);
		}
		
		[Test]
		public void BitNotTest()
		{
			TestUnaryOperatorExpressionTest("~a", UnaryOperatorType.BitNot);
		}
		
		[Test]
		public void MinusTest()
		{
			TestUnaryOperatorExpressionTest("-a", UnaryOperatorType.Minus);
		}
		
		[Test]
		public void PlusTest()
		{
			TestUnaryOperatorExpressionTest("+a", UnaryOperatorType.Plus);
		}
		
		[Test]
		public void IncrementTest()
		{
			TestUnaryOperatorExpressionTest("++a", UnaryOperatorType.Increment);
		}
		
		[Test]
		public void DecrementTest()
		{
			TestUnaryOperatorExpressionTest("--a", UnaryOperatorType.Decrement);
		}
		
		[Test]
		public void PostIncrementTest()
		{
			TestUnaryOperatorExpressionTest("a++", UnaryOperatorType.PostIncrement);
		}
		
		[Test]
		public void PostDecrementTest()
		{
			TestUnaryOperatorExpressionTest("a--", UnaryOperatorType.PostDecrement);
		}
		
		[Test]
		public void Dereference()
		{
			TestUnaryOperatorExpressionTest("*a", UnaryOperatorType.Dereference);
		}
		
		[Test]
		public void AddressOf()
		{
			TestUnaryOperatorExpressionTest("&a", UnaryOperatorType.AddressOf);
		}
		
		[Test]
		public void Await()
		{
			ParseUtilCSharp.AssertExpression(
				"async a => await a",
				new LambdaExpression {
					IsAsync = true,
					Parameters = { new ParameterDeclaration { Name = "a" } },
					Body = new UnaryOperatorExpression(UnaryOperatorType.Await, new IdentifierExpression("a"))
				});
		}
		
		[Test]
		public void AwaitAwait()
		{
			ParseUtilCSharp.AssertExpression(
				"async a => await await a",
				new LambdaExpression {
					IsAsync = true,
					Parameters = { new ParameterDeclaration { Name = "a" } },
					Body = new UnaryOperatorExpression(
						UnaryOperatorType.Await,
						new UnaryOperatorExpression(UnaryOperatorType.Await, new IdentifierExpression("a")))
				});
		}
		
		[Test]
		public void DereferenceAfterCast()
		{
			UnaryOperatorExpression uoe = ParseUtilCSharp.ParseExpression<UnaryOperatorExpression>("*((SomeType*) &w)");
			Assert.AreEqual(UnaryOperatorType.Dereference, uoe.Operator);
			ParenthesizedExpression pe = (ParenthesizedExpression)uoe.Expression;
			CastExpression ce = (CastExpression)pe.Expression;
			ComposedType type = (ComposedType)ce.Type;
			Assert.AreEqual("SomeType", ((SimpleType)type.BaseType).Identifier);
			Assert.AreEqual(1, type.PointerRank);
			
			UnaryOperatorExpression adrOf = (UnaryOperatorExpression)ce.Expression;
			Assert.AreEqual(UnaryOperatorType.AddressOf, adrOf.Operator);
		}
		
		[Test]
		public void AwaitStaticMethodCall()
		{
			var uoe = ParseUtilCSharp.ParseExpression<UnaryOperatorExpression>("await Task.WhenAll(a, b)");
			Assert.AreEqual(UnaryOperatorType.Await, uoe.Operator);
			Assert.IsInstanceOf<InvocationExpression>(uoe.Expression);
		}
		
		[Test]
		public void AwaitStaticMethodCallStatement()
		{
			var es = ParseUtilCSharp.ParseStatement<ExpressionStatement>("await Task.WhenAll(a, b);");
			UnaryOperatorExpression uoe = (UnaryOperatorExpression)es.Expression;
			Assert.AreEqual(UnaryOperatorType.Await, uoe.Operator);
			Assert.IsInstanceOf<InvocationExpression>(uoe.Expression);
		}
	}
}