2 // ExpressionTest_Call.cs
5 // Federico Di Gregorio <fog@initd.org>
6 // Jb Evain (jbevain@novell.com)
8 // (C) 2008 Novell, Inc. (http://www.novell.com)
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.Reflection;
32 using System.Collections.Generic;
34 using System.Linq.Expressions;
35 using NUnit.Framework;
37 namespace MonoTests.System.Linq.Expressions {
40 public class ExpressionTest_Call {
43 [ExpectedException (typeof (ArgumentNullException))]
44 public void Arg1Null ()
46 Expression.Call ((Type)null, "TestMethod", null, Expression.Constant (1));
50 [ExpectedException (typeof (ArgumentNullException))]
51 public void Arg2Null ()
53 Expression.Call (typeof (MemberClass), null, null, Expression.Constant (1));
57 [ExpectedException (typeof (InvalidOperationException))]
58 public void Arg4WrongType ()
60 Expression.Call (typeof (MemberClass), "StaticMethod", null, Expression.Constant (true));
64 [ExpectedException (typeof (InvalidOperationException))]
65 public void InstanceMethod ()
67 Expression.Call (typeof (MemberClass), "TestMethod", null, Expression.Constant (1));
71 public void StaticMethod ()
73 Expression.Call (typeof (MemberClass), "StaticMethod", null, Expression.Constant (1));
77 public void StaticGenericMethod ()
79 Expression.Call (typeof (MemberClass), "StaticGenericMethod", new [] { typeof (int) }, Expression.Constant (1));
83 [ExpectedException (typeof (ArgumentNullException))]
84 public void ArgMethodNull ()
86 Expression.Call (Expression.Constant (new object ()), null);
90 [ExpectedException (typeof (ArgumentException))]
91 public void ArgInstanceNullForNonStaticMethod ()
93 Expression.Call (null, typeof (object).GetMethod ("ToString"));
97 [ExpectedException (typeof (ArgumentException))]
98 public void InstanceTypeDoesntMatchMethodDeclaringType ()
101 // ensure that String.Intern won't be removed by the linker
102 string s = String.Intern (String.Empty);
104 Expression.Call (Expression.Constant (1), typeof (string).GetMethod ("Intern"));
108 [ExpectedException (typeof (ArgumentException))]
109 public void MethodArgumentCountDoesnMatchParameterLength ()
111 Expression.Call (Expression.Constant (new object ()), typeof (object).GetMethod ("ToString"), Expression.Constant (new object ()));
115 public void Bar (string s)
121 [ExpectedException (typeof (ArgumentNullException))]
122 public void MethodHasNullArgument ()
124 Expression.Call (Expression.New (typeof (Foo)), typeof (Foo).GetMethod ("Bar"), null as Expression);
128 [ExpectedException (typeof (ArgumentException))]
129 public void MethodArgumentDoesntMatchParameterType ()
131 Expression.Call (Expression.New (typeof (Foo)), typeof (Foo).GetMethod ("Bar"), Expression.Constant (42));
135 public void CallToString ()
137 var call = Expression.Call (Expression.Constant (new object ()), typeof (object).GetMethod ("ToString"));
138 Assert.AreEqual ("value(System.Object).ToString()", call.ToString ());
142 public void CallStringIsNullOrEmpty ()
144 var call = Expression.Call (null, typeof (string).GetMethod ("IsNullOrEmpty"), Expression.Constant (""));
145 Assert.AreEqual ("IsNullOrEmpty(\"\")", call.ToString ());
149 [Category ("NotDotNet")] // http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=339351
150 [ExpectedException (typeof (ArgumentException))]
151 public void CallStaticMethodWithInstanceArgument ()
154 Expression.Parameter (GetType (), "t"),
155 GetType ().GetMethod ("Identity"),
156 Expression.Constant (null));
159 public static object Identity (object o)
165 public void CompileSimpleStaticCall ()
167 var p = Expression.Parameter (typeof (object), "o");
168 var lambda = Expression.Lambda<Func<object, object>> (Expression.Call (GetType ().GetMethod ("Identity"), p), p);
170 var i = lambda.Compile ();
172 Assert.AreEqual (2, i (2));
173 Assert.AreEqual ("Foo", i ("Foo"));
177 public void CompileSimpleInstanceCall ()
179 var p = Expression.Parameter (typeof (string), "p");
180 var lambda = Expression.Lambda<Func<string, string>> (
182 p, typeof (string).GetMethod ("ToString", Type.EmptyTypes)),
185 var ts = lambda.Compile ();
187 Assert.AreEqual ("foo", ts ("foo"));
188 Assert.AreEqual ("bar", ts ("bar"));
192 [ExpectedException (typeof (InvalidOperationException))]
193 public void CheckTypeArgsIsNotUsedForParameterLookup ()
195 Expression.Call (GetType (), "EineMethod", new [] { typeof (string), typeof (int) }, "foo".ToConstant (), 2.ToConstant ());
198 public static void EineGenericMethod<X, Y> (string foo, int bar)
203 public void CheckTypeArgsIsUsedForGenericArguments ()
205 var m = Expression.Call (GetType (), "EineGenericMethod", new [] { typeof (string), typeof (int) }, "foo".ToConstant (), 2.ToConstant ());
206 Assert.IsNotNull (m.Method);
207 Assert.AreEqual ("Void EineGenericMethod[String,Int32](System.String, Int32)", m.Method.ToString ());
210 public struct EineStrukt {
214 public EineStrukt (string foo)
219 public string GimmeFoo ()
226 [Category ("NotWorkingInterpreter")]
227 public void CallMethodOnStruct ()
229 var param = Expression.Parameter (typeof (EineStrukt), "s");
230 var foo = Expression.Lambda<Func<EineStrukt, string>> (
231 Expression.Call (param, typeof (EineStrukt).GetMethod ("GimmeFoo")), param).Compile ();
233 var s = new EineStrukt ("foo");
234 Assert.AreEqual ("foo", foo (s));
237 public static int OneStaticMethod ()
243 public void CallMethodOnDateTime ()
245 var left = Expression.Call (Expression.Constant (DateTime.Now), typeof(DateTime).GetMethod ("AddDays"), Expression.Constant (-5.0));
246 var right = Expression.Constant (DateTime.Today.AddDays (1));
247 var expr = Expression.GreaterThan (left, right);
249 var eq = Expression.Lambda<Func<bool>> (expr).Compile ();
250 Assert.IsFalse (eq ());
254 [Category ("NotDotNet")] // http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=339351
255 [ExpectedException (typeof (ArgumentException))]
256 public void CallStaticMethodOnNonSenseInstanceExpression ()
259 Expression.Constant ("la la la"),
260 this.GetType ().GetMethod ("OneStaticMethod"));
263 public static int DoSomethingWith (ref int a)
268 public static string DoAnotherThing (ref int a, string s)
274 [Category ("NotWorkingInterpreter")]
275 public void CallStaticMethodWithRefParameter ()
277 var p = Expression.Parameter (typeof (int), "i");
279 var c = Expression.Lambda<Func<int, int>> (
280 Expression.Call (GetType ().GetMethod ("DoSomethingWith"), p), p).Compile ();
282 Assert.AreEqual (42, c (38));
286 [Category ("NotWorkingInterpreter")]
287 public void CallStaticMethodWithRefParameterAndOtherParameter ()
289 var i = Expression.Parameter (typeof (int), "i");
290 var s = Expression.Parameter (typeof (string), "s");
292 var lamda = Expression.Lambda<Func<int, string, string>> (
293 Expression.Call (GetType ().GetMethod ("DoAnotherThing"), i, s), i, s).Compile ();
295 Assert.AreEqual ("foo42", lamda (42, "foo"));
298 public static int Bang (Expression i)
300 return (int) (i as ConstantExpression).Value;
302 static bool fout_called = false;
304 public static int FooOut (out int x)
311 [Category ("NotWorkingInterpreter")]
312 public void Connect282729 ()
314 // test from https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=282729
316 var p = Expression.Parameter (typeof (int), "p");
317 var lambda = Expression.Lambda<Func<int, int>> (
319 GetType ().GetMethod ("FooOut"),
320 Expression.ArrayIndex(
321 Expression.NewArrayBounds (
327 Assert.AreEqual (0, lambda (0));
328 Assert.IsTrue (fout_called);
331 public static int FooOut2 (out int x)
338 [Category ("NotWorking")]
339 [Category ("NotWorkingInterpreter")]
340 public void Connect290278 ()
342 // test from https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=290278
344 var p = Expression.Parameter (typeof (int [,]), "p");
345 var lambda = Expression.Lambda<Func<int [,], int>> (
347 GetType ().GetMethod ("FooOut2"),
348 Expression.ArrayIndex (p, 0.ToConstant (), 0.ToConstant ())),
351 int [,] data = { { 1 } };
353 Assert.AreEqual (3, lambda (data));
354 Assert.AreEqual (2, data [0, 0]);
357 public static void FooRef (ref string s)
362 [Category ("NotWorkingInterpreter")]
363 public void Connect297597 ()
365 // test from https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=297597
367 var strings = new string [1];
369 var lambda = Expression.Lambda<Action> (
371 GetType ().GetMethod ("FooRef"),
372 Expression.ArrayIndex (
373 Expression.Constant (strings), 0.ToConstant ()))).Compile ();
379 [Category ("NotDotNet")] // https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=319190
380 public void Connect319190 ()
382 var lambda = Expression.Lambda<Func<bool>> (
384 Expression.New (typeof (TypedReference)),
385 typeof (object))).Compile ();
387 Assert.IsTrue (lambda ());
390 public static int Truc ()
396 public void Connect282702 ()
398 var lambda = Expression.Lambda<Func<Func<int>>> (
401 typeof (Delegate).GetMethod ("CreateDelegate", new [] { typeof (Type), typeof (object), typeof (MethodInfo) }),
402 Expression.Constant (typeof (Func<int>), typeof (Type)),
403 Expression.Constant (null, typeof (object)),
404 Expression.Constant (GetType ().GetMethod ("Truc"))),
405 typeof (Func<int>))).Compile ();
407 Assert.AreEqual (42, lambda ().Invoke ());
411 public void CallQueryableWhere ()
413 var queryable = new [] { 1, 2, 3 }.AsQueryable ();
415 var parameter = Expression.Parameter (typeof (int), "i");
416 var lambda = Expression.Lambda<Func<int, bool>> (
417 Expression.LessThan (parameter, Expression.Constant (2)),
420 var selector = Expression.Quote (lambda);
422 var call = Expression.Call (
425 new [] { typeof (int) },
426 queryable.Expression,
429 Assert.IsNotNull (call);
430 Assert.IsNotNull (call.Method);
434 public void CallAsQueryable () // #537768
436 var constant = Expression.Constant (
438 typeof (IEnumerable<string>));
440 var call = Expression.Call (
443 new [] { typeof (string) },
446 Assert.IsNotNull (call);
447 Assert.AreEqual (1, call.Arguments.Count);
448 Assert.AreEqual (constant, call.Arguments [0]);
450 var method = call.Method;
452 Assert.AreEqual ("AsQueryable", method.Name);
453 Assert.IsTrue (method.IsGenericMethod);
454 Assert.AreEqual (typeof (string), method.GetGenericArguments () [0]);
459 public void CallQueryableSelect () // #536637
461 var parameter = Expression.Parameter (typeof (string), "s");
462 var string_length = Expression.Property (parameter, typeof (string).GetProperty ("Length"));
463 var lambda = Expression.Lambda (string_length, parameter);
465 var strings = new [] { "1", "22", "333" };
467 var call = Expression.Call (
470 new [] { typeof (string), typeof (int) },
471 Expression.Constant (strings.AsQueryable ()),
474 Assert.IsNotNull (call);
476 var method = call.Method;
478 Assert.AreEqual ("Select", method.Name);
479 Assert.IsTrue (method.IsGenericMethod);
480 Assert.AreEqual (typeof (string), method.GetGenericArguments () [0]);
481 Assert.AreEqual (typeof (int), method.GetGenericArguments () [1]);
485 [Category ("NotWorkingInterpreter")]
486 public void CallNullableGetValueOrDefault () // #568989
488 var value = Expression.Parameter (typeof (int?), "value");
489 var default_parameter = Expression.Parameter (typeof (int), "default");
491 var getter = Expression.Lambda<Func<int?, int, int>> (
498 default_parameter).Compile ();
500 Assert.AreEqual (2, getter (null, 2));
501 Assert.AreEqual (4, getter (4, 2));
505 public void CallToStringOnEnum () // #625367
507 var lambda = Expression.Lambda<Func<string>> (
509 Expression.Constant (TypeCode.Boolean, typeof (TypeCode)),
510 typeof (object).GetMethod ("ToString"))).Compile ();
512 Assert.AreEqual ("Boolean", lambda ());
515 public static void AcceptsIEnumerable(IEnumerable<object> o)
520 public void CallIQueryableMethodWithNewArrayBoundExpression () // #2304
523 GetType ().GetMethod ("AcceptsIEnumerable", BindingFlags.Public | BindingFlags.Static),
524 Expression.NewArrayBounds (typeof (object), Expression.Constant (0)));