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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// 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
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
using System;
using NUnit.Framework;
namespace ICSharpCode.NRefactory.CSharp.Parser.Expression
{
[TestFixture]
public class LambdaExpressionTests
{
[Test]
public void ImplicitlyTypedExpressionBody()
{
ParseUtilCSharp.AssertExpression(
"(x) => x + 1",
new LambdaExpression {
Parameters = { new ParameterDeclaration { Name = "x" } },
Body = new BinaryOperatorExpression(new IdentifierExpression("x"), BinaryOperatorType.Add, new PrimitiveExpression(1))
});
}
[Test]
public void ImplicitlyTypedExpressionBodyWithoutParenthesis()
{
ParseUtilCSharp.AssertExpression(
"x => x + 1",
new LambdaExpression {
Parameters = { new ParameterDeclaration { Name = "x" } },
Body = new BinaryOperatorExpression(new IdentifierExpression("x"), BinaryOperatorType.Add, new PrimitiveExpression(1))
});
}
[Test]
public void ImplicitlyTypedStatementBody()
{
ParseUtilCSharp.AssertExpression(
"(x) => { return x + 1; }",
new LambdaExpression {
Parameters = { new ParameterDeclaration { Name = "x" } },
Body = new BlockStatement {
new ReturnStatement {
Expression = new BinaryOperatorExpression(
new IdentifierExpression("x"), BinaryOperatorType.Add, new PrimitiveExpression(1))
}}});
}
[Test]
public void ImplicitlyTypedStatementBodyWithoutParenthesis()
{
ParseUtilCSharp.AssertExpression(
"x => { return x + 1; }",
new LambdaExpression {
Parameters = { new ParameterDeclaration { Name = "x" } },
Body = new BlockStatement {
new ReturnStatement {
Expression = new BinaryOperatorExpression(
new IdentifierExpression("x"), BinaryOperatorType.Add, new PrimitiveExpression(1))
}}});
}
[Test]
public void ExplicitlyTypedStatementBody()
{
ParseUtilCSharp.AssertExpression(
"(int x) => { return x + 1; }",
new LambdaExpression {
Parameters = { new ParameterDeclaration { Type = new PrimitiveType("int"), Name = "x" } },
Body = new BlockStatement {
new ReturnStatement {
Expression = new BinaryOperatorExpression(
new IdentifierExpression("x"), BinaryOperatorType.Add, new PrimitiveExpression(1))
}}});
}
[Test]
public void ExplicitlyTypedWithRefParameter()
{
ParseUtilCSharp.AssertExpression(
"(ref int i) => i = 1",
new LambdaExpression {
Parameters = {
new ParameterDeclaration {
ParameterModifier = ParameterModifier.Ref,
Type = new PrimitiveType("int"),
Name = "i"
}
},
Body = new AssignmentExpression(new IdentifierExpression("i"), new PrimitiveExpression(1))
});
}
[Test]
public void LambdaExpressionContainingConditionalExpression()
{
ParseUtilCSharp.AssertExpression(
"rr => rr != null ? rr.ResolvedType : null",
new LambdaExpression {
Parameters = { new ParameterDeclaration { Name = "rr" } },
Body = new ConditionalExpression {
Condition = new BinaryOperatorExpression(
new IdentifierExpression("rr"), BinaryOperatorType.InEquality, new NullReferenceExpression()),
TrueExpression = new IdentifierExpression("rr").Member("ResolvedType"),
FalseExpression = new NullReferenceExpression()
}});
}
[Test]
public void AsyncLambdaExpression()
{
ParseUtilCSharp.AssertExpression(
"async x => x + 1",
new LambdaExpression {
IsAsync = true,
Parameters = { new ParameterDeclaration { Name = "x" } },
Body = new BinaryOperatorExpression(new IdentifierExpression("x"), BinaryOperatorType.Add, new PrimitiveExpression(1))
});
}
[Test]
public void AsyncLambdaExpressionWithMultipleParameters()
{
ParseUtilCSharp.AssertExpression(
"async (x,y) => x + 1",
new LambdaExpression {
IsAsync = true,
Parameters = { new ParameterDeclaration { Name = "x" }, new ParameterDeclaration { Name = "y" } },
Body = new BinaryOperatorExpression(new IdentifierExpression("x"), BinaryOperatorType.Add, new PrimitiveExpression(1))
});
}
}
}
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