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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using NUnit.Framework;
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namespace ICSharpCode.NRefactory.CSharp.Parser.Expression
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public class ConditionalExpressionTests
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public void ConditionalExpressionTest()
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a == b ? a() : a.B");
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Assert.IsTrue(ce.Condition is BinaryOperatorExpression);
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Assert.IsTrue(ce.TrueExpression is InvocationExpression);
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Assert.IsTrue(ce.FalseExpression is MemberReferenceExpression);
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public void ConditionalIsExpressionTest()
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// (as is b?) ERROR (conflict with nullables, SD-419)
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a is b ? a() : a.B");
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Assert.IsTrue(ce.Condition is IsExpression);
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Assert.IsTrue(ce.TrueExpression is InvocationExpression);
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Assert.IsTrue(ce.FalseExpression is MemberReferenceExpression);
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public void ConditionalIsWithNullableExpressionTest()
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a is b? ? a() : a.B");
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Assert.IsTrue(ce.Condition is IsExpression);
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Assert.IsTrue(ce.TrueExpression is InvocationExpression);
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Assert.IsTrue(ce.FalseExpression is MemberReferenceExpression);
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public void ConditionalIsExpressionTest2()
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a is b ? (a()) : a.B");
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Assert.IsTrue(ce.Condition is IsExpression);
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Assert.IsTrue(ce.TrueExpression is ParenthesizedExpression);
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Assert.IsTrue(ce.FalseExpression is MemberReferenceExpression);
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public void ConditionalExpressionNegativeValue()
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("isNegative ? -1 : 1");
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Assert.IsTrue(ce.Condition is IdentifierExpression);
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Assert.IsTrue(ce.TrueExpression is UnaryOperatorExpression);
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Assert.IsTrue(ce.FalseExpression is PrimitiveExpression);
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public void ConditionalIsWithNegativeValue()
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a is b ? -1 : 1");
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Assert.IsTrue(ce.Condition is IsExpression);
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Assert.IsTrue(ce.TrueExpression is UnaryOperatorExpression);
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Assert.IsTrue(ce.FalseExpression is PrimitiveExpression);
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public void ConditionalIsWithExplicitPositiveValue()
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a is b ? +1 : 1");
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Assert.IsTrue(ce.Condition is IsExpression);
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Assert.IsTrue(ce.TrueExpression is UnaryOperatorExpression);
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Assert.IsTrue(ce.FalseExpression is PrimitiveExpression);
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public void RepeatedConditionalExpr()
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a ? b : c ? d : e");
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Assert.AreEqual("a", ((IdentifierExpression)ce.Condition).Identifier);
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Assert.AreEqual("b", ((IdentifierExpression)ce.TrueExpression).Identifier);
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Assert.IsTrue(ce.FalseExpression is ConditionalExpression);
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public void NestedConditionalExpr()
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ConditionalExpression ce = ParseUtilCSharp.ParseExpression<ConditionalExpression>("a ? b ? c : d : e");
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Assert.AreEqual("a", ((IdentifierExpression)ce.Condition).Identifier);
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Assert.AreEqual("e", ((IdentifierExpression)ce.FalseExpression).Identifier);
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Assert.IsTrue(ce.TrueExpression is ConditionalExpression);