/mcs/class/System.Core/Test/System.Linq.Expressions/ExpressionTest.cs
C# | 298 lines | 214 code | 57 blank | 27 comment | 0 complexity | 86bd301823e46aea4e19b9f9301ea210 MD5 | raw file
Possible License(s): LGPL-2.0, MPL-2.0-no-copyleft-exception, CC-BY-SA-3.0, GPL-2.0, LGPL-2.1
- //
- // ExpressionTest.cs
- //
- // Author:
- // Jb Evain (jbevain@novell.com)
- //
- // (C) 2008 Novell, Inc. (http://www.novell.com)
- //
- // 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 System.Collections.Generic;
- using System.Reflection;
- using System.Runtime.CompilerServices;
- using System.Linq;
- using System.Linq.Expressions;
- using NUnit.Framework;
- namespace MonoTests.System.Linq.Expressions {
- [TestFixture]
- public class ExpressionTest {
- [Test]
- [ExpectedException (typeof (ArgumentNullException))]
- public void GetFuncTypeArgNull ()
- {
- Expression.GetFuncType (null);
- }
- [Test]
- [ExpectedException (typeof (ArgumentException))]
- public void GetFuncTypeArgEmpty ()
- {
- Expression.GetFuncType (new Type [0]);
- }
- [Test]
- [ExpectedException (typeof (ArgumentException))]
- public void GetFuncTypeArgTooBig ()
- {
- Expression.GetFuncType (new Type [6]);
- }
- [Test]
- public void GetFuncTypeTest ()
- {
- var func = Expression.GetFuncType (new [] {typeof (int)});
- Assert.AreEqual (typeof (Func<int>), func);
- func = Expression.GetFuncType (new [] {typeof (int), typeof (int)});
- Assert.AreEqual (typeof (Func<int, int>), func);
- func = Expression.GetFuncType (new [] {typeof (int), typeof (int), typeof (int)});
- Assert.AreEqual (typeof (Func<int, int, int>), func);
- func = Expression.GetFuncType (new [] {typeof (int), typeof (int), typeof (int), typeof (int)});
- Assert.AreEqual (typeof (Func<int, int, int, int>), func);
- func = Expression.GetFuncType (new [] {typeof (int), typeof (int), typeof (int), typeof (int), typeof (int)});
- Assert.AreEqual (typeof (Func<int, int, int, int, int>), func);
- }
- [Test]
- [ExpectedException (typeof (ArgumentNullException))]
- public void GetActionTypeArgNull ()
- {
- Expression.GetActionType (null);
- }
- [Test]
- [ExpectedException (typeof (ArgumentException))]
- public void GetActionTypeArgTooBig ()
- {
- Expression.GetActionType (new Type [5]);
- }
- [Test]
- public void GetActionTypeTest ()
- {
- var action = Expression.GetActionType (new Type [0]);
- Assert.AreEqual (typeof (Action), action);
- action = Expression.GetActionType (new [] {typeof (int)});
- Assert.AreEqual (typeof (Action<int>), action);
- action = Expression.GetActionType (new [] {typeof (int), typeof (int)});
- Assert.AreEqual (typeof (Action<int, int>), action);
- action = Expression.GetActionType (new [] {typeof (int), typeof (int), typeof (int)});
- Assert.AreEqual (typeof (Action<int, int, int>), action);
- action = Expression.GetActionType (new [] {typeof (int), typeof (int), typeof (int), typeof (int)});
- Assert.AreEqual (typeof (Action<int, int, int, int>), action);
- }
- [Test]
- [ExpectedException (typeof (ArgumentNullException))]
- public void ParameterNullType ()
- {
- Expression.Parameter (null, "foo");
- }
- [Test]
- public void ParameterNullName ()
- {
- var p = Expression.Parameter (typeof (string), null);
- Assert.AreEqual (null, p.Name);
- Assert.AreEqual (typeof (string), p.Type);
- Assert.AreEqual ("<param>", p.ToString ());
- }
- [Test]
- public void ParameterEmptyName ()
- {
- var p = Expression.Parameter (typeof (string), "");
- Assert.AreEqual ("", p.Name);
- Assert.AreEqual (typeof (string), p.Type);
- Assert.AreEqual ("", p.ToString ());
- }
- [Test]
- public void Parameter ()
- {
- var p = Expression.Parameter (typeof (string), "foo");
- Assert.AreEqual ("foo", p.Name);
- Assert.AreEqual (typeof (string), p.Type);
- Assert.AreEqual ("foo", p.ToString ());
- }
- [Test]
- [Category ("NotDotNet")]
- [ExpectedException (typeof (ArgumentException))]
- public void VoidParameter ()
- {
- Expression.Parameter (typeof (void), "hello");
- }
- static int buffer;
- public static int Identity (int i)
- {
- buffer = i;
- return i;
- }
- [Test]
- public void CompileActionDiscardingRetValue ()
- {
- var p = Expression.Parameter (typeof (int), "i");
- var identity = GetType ().GetMethod ("Identity", BindingFlags.Static | BindingFlags.Public );
- Assert.IsNotNull (identity);
- var lambda = Expression.Lambda<Action<int>> (Expression.Call (identity, p), p);
- var method = lambda.Compile ();
- buffer = 0;
- method (42);
- Assert.AreEqual (42, buffer);
- }
- [Test]
- [Category("TargetJvmNotSupported")]
- public void ExpressionDelegateTarget ()
- {
- var p = Expression.Parameter (typeof (string), "str");
- var identity = Expression.Lambda<Func<string, string>> (p, p).Compile ();
- Assert.AreEqual (typeof (Func<string, string>), identity.GetType ());
- Assert.IsNotNull (identity.Target);
- #if !NET_4_0
- Assert.AreEqual (typeof (ExecutionScope), identity.Target.GetType ());
- #endif
- }
- class Foo {
- public string gazonk;
- }
- struct Bar {
- public int baz;
- public override string ToString ()
- {
- return baz.ToString ();
- }
- }
- #if !NET_4_0
- [Test]
- [Category ("TargetJvmNotSupported")]
- public void GlobalsInScope ()
- {
- var foo = new Foo { gazonk = "gazonk" };
- var bar = new Bar { baz = 42 };
- var l = Expression.Lambda<Func<string>> (
- Expression.Call (
- typeof (string).GetMethod ("Concat", new [] { typeof (string), typeof (string) }),
- Expression.Field (Expression.Constant (foo), typeof (Foo).GetField ("gazonk")),
- Expression.Call (Expression.Constant (bar), typeof (Bar).GetMethod ("ToString"))));
- var del = l.Compile ();
- var scope = del.Target as ExecutionScope;
- Assert.IsNotNull (scope);
- var globals = scope.Globals;
- Assert.IsNotNull (globals);
- Assert.AreEqual (2, globals.Length);
- Assert.AreEqual (typeof (StrongBox<Foo>), globals [0].GetType ());
- Assert.AreEqual (typeof (StrongBox<Bar>), globals [1].GetType ());
- Assert.AreEqual (foo, ((StrongBox<Foo>) globals [0]).Value);
- Assert.AreEqual (bar, ((StrongBox<Bar>) globals [1]).Value);
- Assert.AreEqual ("gazonk42", del ());
- }
- #endif
- [Test]
- public void SimpleHoistedParameter ()
- {
- var p = Expression.Parameter (typeof (string), "s");
- var f = Expression.Lambda<Func<string, Func<string>>> (
- Expression.Lambda<Func<string>> (
- p,
- new ParameterExpression [0]),
- p).Compile ();
- var f2 = f ("x");
- Assert.AreEqual ("x", f2 ());
- }
- [Test]
- public void TwoHoistingLevels ()
- {
- var p1 = Expression.Parameter (typeof (string), "x");
- var p2 = Expression.Parameter (typeof (string), "y");
- Expression<Func<string, Func<string, Func<string>>>> e =
- Expression.Lambda<Func<string, Func<string, Func<string>>>> (
- Expression.Lambda<Func<string, Func<string>>> (
- Expression.Lambda<Func<string>> (
- Expression.Call (
- typeof (string).GetMethod ("Concat", new [] { typeof (string), typeof (string) }),
- new [] { p1, p2 }),
- new ParameterExpression [0]),
- new [] { p2 }),
- new [] { p1 });
- var f = e.Compile ();
- var f2 = f ("Hello ");
- var f3 = f2 ("World !");
- Assert.AreEqual ("Hello World !", f3 ());
- }
- [Test]
- public void HoistedParameter ()
- {
- var i = Expression.Parameter (typeof (int), "i");
- var l = Expression.Lambda<Func<int, string>> (
- Expression.Invoke (
- Expression.Lambda<Func<string>> (
- Expression.Call (i, typeof (int).GetMethod ("ToString", Type.EmptyTypes)))), i).Compile ();
- Assert.AreEqual ("42", l (42));
- }
- }
- }