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// 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
//
// Authors:
// Federico Di Gregorio <fog@initd.org>
using System;
using System.Reflection;
using System.Linq;
using System.Linq.Expressions;
using NUnit.Framework;
namespace MonoTests.System.Linq.Expressions
{
[TestFixture]
public class ExpressionTest_Field
{
[Test]
[ExpectedException (typeof (ArgumentNullException))]
public void Arg1Null ()
{
Expression.Field (null, "NoField");
}
[Test]
[ExpectedException (typeof (ArgumentNullException))]
public void Arg2Null1 ()
{
Expression.Field (Expression.Constant (new MemberClass()), (string)null);
}
[Test]
[ExpectedException (typeof (ArgumentNullException))]
public void Arg2Null2 ()
{
Expression.Field (Expression.Constant (new MemberClass()), (FieldInfo)null);
}
[Test]
[ExpectedException (typeof (ArgumentException))]
public void NoField ()
{
Expression.Field (Expression.Constant (new MemberClass()), "NoField");
}
[Test]
public void InstanceField ()
{
MemberExpression expr = Expression.Field (Expression.Constant (new MemberClass()), "TestField1");
Assert.AreEqual (ExpressionType.MemberAccess, expr.NodeType, "Field#01");
Assert.AreEqual (typeof (int), expr.Type, "Field#02");
Assert.AreEqual ("value(MonoTests.System.Linq.Expressions.MemberClass).TestField1", expr.ToString(), "Field#03");
}
[Test]
[ExpectedException (typeof (ArgumentException))]
public void StaticField1 ()
{
// This will fail because access to a static field should be created using a FieldInfo and
// not an instance plus the field name.
Expression.Field (Expression.Constant (new MemberClass()), "StaticField");
}
[Test]
public void StaticField2 ()
{
MemberExpression expr = Expression.Field (null, MemberClass.GetStaticFieldInfo());
Assert.AreEqual (ExpressionType.MemberAccess, expr.NodeType, "Field#07");
Assert.AreEqual (typeof (int), expr.Type, "Field#08");
Assert.AreEqual ("MemberClass.StaticField", expr.ToString(), "Field#09");
}
[Test]
[Category ("NotDotNet")] // http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=339351
[ExpectedException (typeof (ArgumentException))]
public void StaticFieldWithInstanceArgument ()
{
Expression.Field (
Expression.Parameter (GetType (), "t"),
GetType ().GetField ("foo"));
}
public static string foo = "foo";
[Test]
public void CompileStaticField ()
{
var foo = Expression.Lambda<Func<string>> (
Expression.Field (null, GetType ().GetField (
"foo", BindingFlags.Static | BindingFlags.Public))).Compile ();
Assert.AreEqual ("foo", foo ());
}
public class Bar {
public string baz;
public Bar ()
{
baz = "baz";
}
}
[Test]
public void CompileInstanceField ()
{
var p = Expression.Parameter (typeof (Bar), "bar");
var baz = Expression.Lambda<Func<Bar, string>> (
Expression.Field (p, typeof (Bar).GetField (
"baz", BindingFlags.Public | BindingFlags.Instance)), p).Compile ();
Assert.AreEqual ("baz", baz (new Bar ()));
}
public struct Gazonk {
public string Tzap;
public Gazonk (string tzap)
{
Tzap = tzap;
}
}
[Test]
public void CompileStructInstanceField ()
{
var p = Expression.Parameter (typeof (Gazonk), "gazonk");
var gazonker = Expression.Lambda<Func<Gazonk, string>> (
Expression.Field (p, typeof (Gazonk).GetField ("Tzap")), p).Compile ();
Assert.AreEqual ("bang", gazonker (new Gazonk ("bang")));
}
}
}
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