+//
+// ExpressionTest_Call.cs
+//
+// Author:
+// Federico Di Gregorio <fog@initd.org>
+// 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
// 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.
//
-// Authors:
-// Federico Di Gregorio <fog@initd.org>
using System;
using System.Reflection;
using System.Linq.Expressions;
using NUnit.Framework;
-namespace MonoTests.System.Linq.Expressions
-{
- // Tests for (type, methodName, ...) version.
-
- [TestFixture]
- public class ExpressionTest_CallWithType
- {
- [Test]
- [ExpectedException (typeof (NullReferenceException))]
- public void Arg1Null ()
- {
- Expression.Call ((Type)null, "TestMethod", null, Expression.Constant (1));
- }
-
- [Test]
- [ExpectedException (typeof (ArgumentNullException))]
- public void Arg2Null ()
- {
- Expression.Call (typeof (MemberClass), null, null, Expression.Constant (1));
- }
-
- [Test]
- [ExpectedException (typeof (InvalidOperationException))]
- public void Arg4WrongType ()
- {
- Expression.Call (typeof (MemberClass), "StaticMethod", null, Expression.Constant (true));
- }
-
- [Test]
- [ExpectedException (typeof (InvalidOperationException))]
- public void InstanceMethod ()
- {
- Expression.Call (typeof (MemberClass), "TestMethod", null, Expression.Constant (1));
- }
-
- [Test]
- public void StaticMethod ()
- {
- Expression.Call (typeof (MemberClass), "StaticMethod", null, Expression.Constant (1));
- }
-
- [Test]
- public void StaticGenericMethod ()
- {
- MemberClass.StaticGenericMethod(1);
- Expression.Call (typeof (MemberClass), "StaticGenericMethod", new Type [1] { typeof (int) }, Expression.Constant (1));
- }
- }
+namespace MonoTests.System.Linq.Expressions {
+
+ [TestFixture]
+ public class ExpressionTest_Call {
+
+ [Test]
+ [ExpectedException (typeof (ArgumentNullException))]
+ public void Arg1Null ()
+ {
+ Expression.Call ((Type)null, "TestMethod", null, Expression.Constant (1));
+ }
+
+ [Test]
+ [ExpectedException (typeof (ArgumentNullException))]
+ public void Arg2Null ()
+ {
+ Expression.Call (typeof (MemberClass), null, null, Expression.Constant (1));
+ }
+
+ [Test]
+ [ExpectedException (typeof (InvalidOperationException))]
+ public void Arg4WrongType ()
+ {
+ Expression.Call (typeof (MemberClass), "StaticMethod", null, Expression.Constant (true));
+ }
+
+ [Test]
+ [ExpectedException (typeof (InvalidOperationException))]
+ public void InstanceMethod ()
+ {
+ Expression.Call (typeof (MemberClass), "TestMethod", null, Expression.Constant (1));
+ }
+
+ [Test]
+ public void StaticMethod ()
+ {
+ Expression.Call (typeof (MemberClass), "StaticMethod", null, Expression.Constant (1));
+ }
+
+ [Test]
+ public void StaticGenericMethod ()
+ {
+ Expression.Call (typeof (MemberClass), "StaticGenericMethod", new [] { typeof (int) }, Expression.Constant (1));
+ }
+
+ [Test]
+ [ExpectedException (typeof (ArgumentNullException))]
+ public void ArgMethodNull ()
+ {
+ Expression.Call (Expression.Constant (new object ()), null);
+ }
+
+ [Test]
+#if NET_4_0
+ [ExpectedException (typeof (ArgumentException))]
+#else
+ [ExpectedException (typeof (ArgumentNullException))]
+#endif
+ public void ArgInstanceNullForNonStaticMethod ()
+ {
+ Expression.Call (null, typeof (object).GetMethod ("ToString"));
+ }
+
+ [Test]
+ [ExpectedException (typeof (ArgumentException))]
+ public void InstanceTypeDoesntMatchMethodDeclaringType ()
+ {
+ Expression.Call (Expression.Constant (1), typeof (string).GetMethod ("Intern"));
+ }
+
+ [Test]
+ [ExpectedException (typeof (ArgumentException))]
+ public void MethodArgumentCountDoesnMatchParameterLength ()
+ {
+ Expression.Call (Expression.Constant (new object ()), typeof (object).GetMethod ("ToString"), Expression.Constant (new object ()));
+ }
+
+ public class Foo {
+ public void Bar (string s)
+ {
+ }
+ }
+
+ [Test]
+ [ExpectedException (typeof (ArgumentNullException))]
+ public void MethodHasNullArgument ()
+ {
+ Expression.Call (Expression.New (typeof (Foo)), typeof (Foo).GetMethod ("Bar"), null as Expression);
+ }
+
+ [Test]
+ [ExpectedException (typeof (ArgumentException))]
+ public void MethodArgumentDoesntMatchParameterType ()
+ {
+ Expression.Call (Expression.New (typeof (Foo)), typeof (Foo).GetMethod ("Bar"), Expression.Constant (42));
+ }
+
+ [Test]
+ public void CallToString ()
+ {
+ var call = Expression.Call (Expression.Constant (new object ()), typeof (object).GetMethod ("ToString"));
+ Assert.AreEqual ("value(System.Object).ToString()", call.ToString ());
+ }
+
+ [Test]
+ public void CallStringIsNullOrEmpty ()
+ {
+ var call = Expression.Call (null, typeof (string).GetMethod ("IsNullOrEmpty"), Expression.Constant (""));
+ Assert.AreEqual ("IsNullOrEmpty(\"\")", call.ToString ());
+ }
+
+ [Test]
+ [Category ("NotDotNet")] // http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=339351
+ [ExpectedException (typeof (ArgumentException))]
+ public void CallStaticMethodWithInstanceArgument ()
+ {
+ Expression.Call (
+ Expression.Parameter (GetType (), "t"),
+ GetType ().GetMethod ("Identity"),
+ Expression.Constant (null));
+ }
+
+ public static object Identity (object o)
+ {
+ return o;
+ }
+
+ [Test]
+ public void CompileSimpleStaticCall ()
+ {
+ var p = Expression.Parameter (typeof (object), "o");
+ var lambda = Expression.Lambda<Func<object, object>> (Expression.Call (GetType ().GetMethod ("Identity"), p), p);
+
+ var i = lambda.Compile ();
+
+ Assert.AreEqual (2, i (2));
+ Assert.AreEqual ("Foo", i ("Foo"));
+ }
+
+ [Test]
+ public void CompileSimpleInstanceCall ()
+ {
+ var p = Expression.Parameter (typeof (string), "p");
+ var lambda = Expression.Lambda<Func<string, string>> (
+ Expression.Call (
+ p, typeof (string).GetMethod ("ToString", Type.EmptyTypes)),
+ p);
+
+ var ts = lambda.Compile ();
+
+ Assert.AreEqual ("foo", ts ("foo"));
+ Assert.AreEqual ("bar", ts ("bar"));
+ }
+
+ [Test]
+ [ExpectedException (typeof (InvalidOperationException))]
+ public void CheckTypeArgsIsNotUsedForParameterLookup ()
+ {
+ Expression.Call (GetType (), "EineMethod", new [] { typeof (string), typeof (int) }, "foo".ToConstant (), 2.ToConstant ());
+ }
+
+ public static void EineGenericMethod<X, Y> (string foo, int bar)
+ {
+ }
+
+ [Test]
+ public void CheckTypeArgsIsUsedForGenericArguments ()
+ {
+ var m = Expression.Call (GetType (), "EineGenericMethod", new [] { typeof (string), typeof (int) }, "foo".ToConstant (), 2.ToConstant ());
+ Assert.IsNotNull (m.Method);
+ Assert.AreEqual ("Void EineGenericMethod[String,Int32](System.String, Int32)", m.Method.ToString ());
+ }
+
+ public struct EineStrukt {
+
+ public string Foo;
+
+ public EineStrukt (string foo)
+ {
+ Foo = foo;
+ }
+
+ public string GimmeFoo ()
+ {
+ return Foo;
+ }
+ }
+
+ [Test]
+ public void CallMethodOnStruct ()
+ {
+ var param = Expression.Parameter (typeof (EineStrukt), "s");
+ var foo = Expression.Lambda<Func<EineStrukt, string>> (
+ Expression.Call (param, typeof (EineStrukt).GetMethod ("GimmeFoo")), param).Compile ();
+
+ var s = new EineStrukt ("foo");
+ Assert.AreEqual ("foo", foo (s));
+ }
+
+ public static int OneStaticMethod ()
+ {
+ return 42;
+ }
+
+ [Test]
+ [Category ("NotDotNet")] // http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=339351
+ [ExpectedException (typeof (ArgumentException))]
+ public void CallStaticMethodOnNonSenseInstanceExpression ()
+ {
+ Expression.Call (
+ Expression.Constant ("la la la"),
+ this.GetType ().GetMethod ("OneStaticMethod"));
+ }
+
+ public static int DoSomethingWith (ref int a)
+ {
+ return a + 4;
+ }
+
+ public static string DoAnotherThing (ref int a, string s)
+ {
+ return s + a;
+ }
+
+ [Test]
+ public void CallStaticMethodWithRefParameter ()
+ {
+ var p = Expression.Parameter (typeof (int), "i");
+
+ var c = Expression.Lambda<Func<int, int>> (
+ Expression.Call (GetType ().GetMethod ("DoSomethingWith"), p), p).Compile ();
+
+ Assert.AreEqual (42, c (38));
+ }
+
+ [Test]
+ public void CallStaticMethodWithRefParameterAndOtherParameter ()
+ {
+ var i = Expression.Parameter (typeof (int), "i");
+ var s = Expression.Parameter (typeof (string), "s");
+
+ var lamda = Expression.Lambda<Func<int, string, string>> (
+ Expression.Call (GetType ().GetMethod ("DoAnotherThing"), i, s), i, s).Compile ();
+
+ Assert.AreEqual ("foo42", lamda (42, "foo"));
+ }
+
+ public static int Bang (Expression i)
+ {
+ return (int) (i as ConstantExpression).Value;
+ }
+#if !NET_4_0 // dlr bug 5875
+ [Test]
+ public void CallMethodWithExpressionParameter ()
+ {
+ var call = Expression.Call (GetType ().GetMethod ("Bang"), Expression.Constant (42));
+ Assert.AreEqual (ExpressionType.Quote, call.Arguments [0].NodeType);
+
+ var l = Expression.Lambda<Func<int>> (call).Compile ();
+
+ Assert.AreEqual (42, l ());
+ }
+#endif
+ static bool fout_called = false;
+
+ public static int FooOut (out int x)
+ {
+ fout_called = true;
+ return x = 0;
+ }
+
+ [Test]
+ public void Connect282729 ()
+ {
+ // test from https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=282729
+
+ var p = Expression.Parameter (typeof (int), "p");
+ var lambda = Expression.Lambda<Func<int, int>> (
+ Expression.Call (
+ GetType ().GetMethod ("FooOut"),
+ Expression.ArrayIndex(
+ Expression.NewArrayBounds (
+ typeof(int),
+ 1.ToConstant ()),
+ 0.ToConstant ())),
+ p).Compile ();
+
+ Assert.AreEqual (0, lambda (0));
+ Assert.IsTrue (fout_called);
+ }
+
+ public static int FooOut2 (out int x)
+ {
+ x = 2;
+ return 3;
+ }
+
+ [Test]
+ [Category ("NotWorking")]
+ public void Connect290278 ()
+ {
+ // test from https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=290278
+
+ var p = Expression.Parameter (typeof (int [,]), "p");
+ var lambda = Expression.Lambda<Func<int [,], int>> (
+ Expression.Call (
+ GetType ().GetMethod ("FooOut2"),
+ Expression.ArrayIndex (p, 0.ToConstant (), 0.ToConstant ())),
+ p).Compile ();
+
+ int [,] data = { { 1 } };
+
+ Assert.AreEqual (3, lambda (data));
+ Assert.AreEqual (2, data [0, 0]);
+ }
+
+ public static void FooRef (ref string s)
+ {
+ }
+
+ [Test]
+ public void Connect297597 ()
+ {
+ // test from https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=297597
+
+ var strings = new string [1];
+
+ var lambda = Expression.Lambda<Action> (
+ Expression.Call (
+ GetType ().GetMethod ("FooRef"),
+ Expression.ArrayIndex (
+ Expression.Constant (strings), 0.ToConstant ()))).Compile ();
+
+ lambda ();
+ }
+
+ [Test]
+ [Category ("NotDotNet")] // https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=319190
+ public void Connect319190 ()
+ {
+ var lambda = Expression.Lambda<Func<bool>> (
+ Expression.TypeIs (
+ Expression.New (typeof (TypedReference)),
+ typeof (object))).Compile ();
+
+ Assert.IsTrue (lambda ());
+ }
+
+ public static int Truc ()
+ {
+ return 42;
+ }
+
+ [Test]
+ public void Connect282702 ()
+ {
+ var lambda = Expression.Lambda<Func<Func<int>>> (
+ Expression.Convert (
+ Expression.Call (
+ typeof (Delegate).GetMethod ("CreateDelegate", new [] { typeof (Type), typeof (object), typeof (MethodInfo) }),
+ Expression.Constant (typeof (Func<int>), typeof (Type)),
+ Expression.Constant (null, typeof (object)),
+ Expression.Constant (GetType ().GetMethod ("Truc"))),
+ typeof (Func<int>))).Compile ();
+
+ Assert.AreEqual (42, lambda ().Invoke ());
+ }
+
+ [Test]
+ public void CallQueryableWhere ()
+ {
+ var queryable = new [] { 1, 2, 3 }.AsQueryable ();
+
+ var parameter = Expression.Parameter (typeof (int), "i");
+ var lambda = Expression.Lambda<Func<int, bool>> (
+ Expression.LessThan (parameter, Expression.Constant (2)),
+ parameter);
+
+ var selector = Expression.Quote (lambda);
+
+ var call = Expression.Call (
+ typeof (Queryable),
+ "Where",
+ new [] { typeof (int) },
+ queryable.Expression,
+ selector);
+
+ Assert.IsNotNull (call);
+ Assert.IsNotNull (call.Method);
+ }
+
+ [Test]
+ public void CallAsQueryable () // #537768
+ {
+ var constant = Expression.Constant (
+ new List<string> (),
+ typeof (IEnumerable<string>));
+
+ var call = Expression.Call (
+ typeof (Queryable),
+ "AsQueryable",
+ new [] { typeof (string) },
+ constant);
+
+ Assert.IsNotNull (call);
+ Assert.AreEqual (1, call.Arguments.Count);
+ Assert.AreEqual (constant, call.Arguments [0]);
+
+ var method = call.Method;
+
+ Assert.AreEqual ("AsQueryable", method.Name);
+ Assert.IsTrue (method.IsGenericMethod);
+ Assert.AreEqual (typeof (string), method.GetGenericArguments () [0]);
+ }
+
+
+ [Test]
+ public void CallQueryableSelect () // #536637
+ {
+ var parameter = Expression.Parameter (typeof (string), "s");
+ var string_length = Expression.Property (parameter, typeof (string).GetProperty ("Length"));
+ var lambda = Expression.Lambda (string_length, parameter);
+
+ var strings = new [] { "1", "22", "333" };
+
+ var call = Expression.Call (
+ typeof (Queryable),
+ "Select",
+ new [] { typeof (string), typeof (int) },
+ Expression.Constant (strings.AsQueryable ()),
+ lambda);
+
+ Assert.IsNotNull (call);
+
+ var method = call.Method;
+
+ Assert.AreEqual ("Select", method.Name);
+ Assert.IsTrue (method.IsGenericMethod);
+ Assert.AreEqual (typeof (string), method.GetGenericArguments () [0]);
+ Assert.AreEqual (typeof (int), method.GetGenericArguments () [1]);
+ }
+
+ [Test]
+ public void CallNullableGetValueOrDefault () // #568989
+ {
+ var value = Expression.Parameter (typeof (int?), "value");
+ var default_parameter = Expression.Parameter (typeof (int), "default");
+
+ var getter = Expression.Lambda<Func<int?, int, int>> (
+ Expression.Call (
+ value,
+ "GetValueOrDefault",
+ Type.EmptyTypes,
+ default_parameter),
+ value,
+ default_parameter).Compile ();
+
+ Assert.AreEqual (2, getter (null, 2));
+ Assert.AreEqual (4, getter (4, 2));
+ }
+ }
}
projects / mono.git / blobdiff