Fix tests.

tests/Avalonia.Markup.UnitTests/Parsers/ExpressionObserverBuilderTests_Method.cs

@@ -19,12 +19,9 @@ namespace Avalonia.Markup.UnitTests.Parsers
 
             public int MethodWithReturn() => 0;
 
-            public int MethodWithReturnAndParameters(int i) => i;
+            public int MethodWithReturnAndParameter(object i) => (int)i;
 
             public static void StaticMethod() { }
-
-            public static void ManyParameters(int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8, int a9) { }
-            public static int ManyParametersWithReturnType(int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8) => 1;
         }
 
         [Fact]
@@ -42,10 +39,8 @@ namespace Avalonia.Markup.UnitTests.Parsers
         [Theory]
         [InlineData(nameof(TestObject.MethodWithoutReturn), typeof(Action))]
         [InlineData(nameof(TestObject.MethodWithReturn), typeof(Func<int>))]
-        [InlineData(nameof(TestObject.MethodWithReturnAndParameters), typeof(Func<int, int>))]
+        [InlineData(nameof(TestObject.MethodWithReturnAndParameter), typeof(Func<object, int>))]
         [InlineData(nameof(TestObject.StaticMethod), typeof(Action))]
-        [InlineData(nameof(TestObject.ManyParameters), typeof(Action<int, int, int, int, int, int, int, int, int>))]
-        [InlineData(nameof(TestObject.ManyParametersWithReturnType), typeof(Func<int, int, int, int, int, int, int, int, int>))]
         public async Task Should_Get_Method_WithCorrectDelegateType(string methodName, Type expectedType)
         {
             var data = new TestObject();
@@ -61,10 +56,10 @@ namespace Avalonia.Markup.UnitTests.Parsers
         public async Task Can_Call_Method_Returned_From_Observer()
         {
             var data = new TestObject();
-            var observer = ExpressionObserverBuilder.Build(data, nameof(TestObject.MethodWithReturnAndParameters));
+            var observer = ExpressionObserverBuilder.Build(data, nameof(TestObject.MethodWithReturnAndParameter));
             var result = await observer.Take(1);
 
-            var callback = (Func<int, int>)result;
+            var callback = (Func<object, int>)result;
 
             Assert.Equal(1, callback(1));