CppSharp/tests/dotnet/Common/Common.Tests.cs

using System;
using System.Reflection;
using CommonTest;
using NUnit.Framework;
using Enum = CommonTest.Enum;

[TestFixture]
public class CommonTests
{
    [Test]
    public unsafe void TestCodeGeneration()
    {
#pragma warning disable 0168 // warning CS0168: The variable `foo' is declared but never used
#pragma warning disable 0219 // warning CS0219: The variable `foo' is assigned but its value is never used

        using (var changedAccessOfInheritedProperty = new ChangedAccessOfInheritedProperty())
        {
            Assert.That(changedAccessOfInheritedProperty.Property, Is.EqualTo(2));
        }
        Foo.NestedAbstract a;
        Foo.RenamedEmptyEnum.EmptyEnum1.GetHashCode();
        using (var foo = new Foo(5))
        {
            Assert.That(foo.B, Is.EqualTo(5));
            Bar bar = foo;
            Assert.IsTrue(Bar.Item.Item1 == bar);
            foo.FieldOfTypedefPrimitivePointer = null;

            using (var hasOverloadsWithDifferentPointerKindsToSameType =
                new HasOverloadsWithDifferentPointerKindsToSameType())
            {
                hasOverloadsWithDifferentPointerKindsToSameType.Overload(foo, 0);
                using (var foo2 = new Foo2())
                    hasOverloadsWithDifferentPointerKindsToSameType.Overload(foo2, 0);
            }
        }
        using (var overridesNonDirectVirtual = new OverridesNonDirectVirtual())
        {
            using (var foo = new Foo())
            {
                Assert.That(overridesNonDirectVirtual.RetInt(foo), Is.EqualTo(3));
                Assert.That(foo.FooPtr, Is.EqualTo(1));
            }
        }
        using (var derivedFromTemplateInstantiationWithVirtual = new DerivedFromTemplateInstantiationWithVirtual())
        {
        }
        using (var hasProtectedEnum = new HasProtectedEnum())
        {
        }
        using (var hasPropertyNamedAsParent = new HasPropertyNamedAsParent())
        {
            hasPropertyNamedAsParent.hasPropertyNamedAsParent.GetHashCode();
        }
        using (Common.FreeFunctionReturnsVirtualDtor)
        {
        }
        EnumWithUnderscores.lOWER_BEFORE_CAPITAL.GetHashCode();
        EnumWithUnderscores.UnderscoreAtEnd.GetHashCode();
        EnumWithUnderscores.CAPITALS_More.GetHashCode();
        EnumWithUnderscores.UsesDigits1_0.GetHashCode();
        ItemsDifferByCase.Case_a.GetHashCode();
        ItemsDifferByCase.CaseA.GetHashCode();
        Enum.NAME_A.GetHashCode();
        Enum.NAME__A.GetHashCode();
        new AmbiguousParamNames(0, 0).Dispose();
        Common.SMallFollowedByCapital();
        Common.IntegerOverload(0);
        Common.IntegerOverload((uint)0);
        Common.TakeVoidStarStar(null);
        Common.OverloadPointer(IntPtr.Zero, 1);
        using (new DerivedFromSecondaryBaseWithIgnoredVirtualMethod()) { }
        using (new CommonTest.SomeNamespace.NamespacedAbstractImpl()) { }

#pragma warning restore 0168
#pragma warning restore 0219
    }

    [Test]
    public void TestHello()
    {
        using (var hello = new Hello())
        {
            hello.PrintHello("Hello world");

            Assert.That(hello.Add(1, 1), Is.EqualTo(2));
            Assert.That(hello.Add(5, 5), Is.EqualTo(10));

            Assert.IsTrue(hello.Test1(3, 3.0f));
            Assert.IsFalse(hello.Test1(2, 3.0f));

            var foo = new Foo { A = 4, B = 7 };
            Assert.That(hello.AddFoo(foo), Is.EqualTo(11));
            Assert.That(hello.AddFooPtr(foo), Is.EqualTo(11));
            Assert.That(hello.AddFooPtr(foo), Is.EqualTo(11));
            Assert.That(hello.AddFooRef(foo), Is.EqualTo(11));
            unsafe
            {
                var pointer = foo.SomePointer;
                var pointerPointer = foo.SomePointerPointer;
                for (int i = 0; i < 4; i++)
                {
                    Assert.AreEqual(i, pointer[i]);
                    Assert.AreEqual(i, (*pointerPointer)[i]);
                }
            }

            var bar = new Bar { A = 4, B = 7 };
            Assert.That(hello.AddBar(bar), Is.EqualTo(11));
            Assert.That(bar.RetItem1(), Is.EqualTo(Bar.Item.Item1));

            using (var retFoo = hello.RetFoo(7, 2.0f))
            {
                Assert.That(retFoo.A, Is.EqualTo(7));
                Assert.That(retFoo.B, Is.EqualTo(2.0));
            }

            using (var foo2 = new Foo2 { A = 4, B = 2, C = 3 })
            {
                Assert.That(hello.AddFoo(foo2), Is.EqualTo(6));
                Assert.That(hello.AddFoo2(foo2), Is.EqualTo(9));
            }

            var bar2 = new Bar2 { A = 4, B = 7, C = 3 };
            Assert.That(hello.AddBar2(bar2), Is.EqualTo(14));

            Assert.That(hello.RetEnum(Enum.A), Is.EqualTo(0));
            Assert.That(hello.RetEnum(Enum.B), Is.EqualTo(2));
            Assert.That(hello.RetEnum(Enum.C), Is.EqualTo(5));
            //Assert.That(hello.RetEnum(Enum.D), Is.EqualTo(-2147483648));
            Assert.That(hello.RetEnum(Enum.E), Is.EqualTo(1));
            Assert.That(hello.RetEnum(Enum.F), Is.EqualTo(-9));
        }
    }

    [Test]
    public void TestPrimitiveConstCharStringInOut()
    {
        using (var hello = new Hello())
        {
            hello.StringOut(out string str);
            Assert.That(str, Is.EqualTo("HelloStringOut"));
            hello.StringOutRef(out str);
            Assert.That(str, Is.EqualTo("HelloStringOutRef"));
            str = "Hello";
            hello.StringInOut(ref str);
            Assert.That(str, Is.EqualTo("StringInOut"));
            str = "Hello";
            hello.StringInOutRef(ref str);
            Assert.That(str, Is.EqualTo("StringInOutRef"));
            hello.StringTypedef(str);
        }
    }

    [Test]
    public void TestPrimitiveOutParameters()
    {
        using (var hello = new Hello())
        {
            Assert.That(hello.TestPrimitiveOut(out float f), Is.True);
            Assert.That(f, Is.EqualTo(10.0f));
        }
    }

    [Test]
    public void TestPrimitiveOutRefParameters()
    {
        using (var hello = new Hello())
        {
            Assert.That(hello.TestPrimitiveOutRef(out float f), Is.True);
            Assert.That(f, Is.EqualTo(10.0f));
        }
    }

    public void TestPrimitiveInOutParameters()
    {
        using (var hello = new Hello())
        {
            int i = 10;
            Assert.That(hello.TestPrimitiveInOut(ref i), Is.True);
            Assert.That(i, Is.EqualTo(20));
        }
    }

    [Test]
    public void TestPrimitiveInOutRefParameters()
    {
        using (var hello = new Hello())
        {
            int i = 10;
            Assert.That(hello.TestPrimitiveInOutRef(ref i), Is.True);
            Assert.That(i, Is.EqualTo(20));
        }
    }

    [Test]
    public void TestEnumOut()
    {
        using (var hello = new Hello())
        {
            hello.EnumOut((int)Enum.C, out Enum e);
            Assert.That(e, Is.EqualTo(Enum.C));
        }
    }

    [Test]
    public void TestEnumOutRef()
    {
        using (var hello = new Hello())
        {
            hello.EnumOutRef((int)Enum.C, out Enum e);
            Assert.That(e, Is.EqualTo(Enum.C));
        }
    }

    [Test]
    public void TestEnumInOut()
    {
        using (var hello = new Hello())
        {
            var e = Enum.E;
            hello.EnumInOut(ref e);
            Assert.That(e, Is.EqualTo(Enum.F));
        }
    }

    [Test]
    public void TestEnumInOutRef()
    {
        using (var hello = new Hello())
        {
            var e = Enum.E;
            hello.EnumInOut(ref e);
            Assert.That(e, Is.EqualTo(Enum.F));
        }
    }

    [Test]
    public void TestNullRef()
    {
        using (var hello = new Hello())
        {
            Assert.That(hello.RetNull(), Is.Null);
        }
    }

    [Test]
    public void TestAmbiguous()
    {
        using (var def = new DefaultParameters())
        {
            def.Foo(1, 2);
            def.Bar();
        }
        using (Foo foo = new Foo())
        {
            Common.HasPointerParam(foo, 0);
            Common.HasPointerParam(foo);
        }
    }

    [Test]
    public void TestLeftShiftOperator()
    {
        using (var foo2 = new Foo2 { C = 2 })
        {
            Foo2 result = foo2 << 3;
            foo2.TestKeywordParam(IntPtr.Zero, Bar.Item.Item1, 1);
            Assert.That(result.C, Is.EqualTo(16));
        }
    }

    [Test]
    public void TestAbstractReturnType()
    {
        using (var returnsAbstractFoo = new ReturnsAbstractFoo())
        {
            var abstractFoo = returnsAbstractFoo.Foo;
            Assert.AreEqual(abstractFoo.PureFunction(1), 5);
            Assert.AreEqual(abstractFoo.PureFunction1, 10);
            var ok = false;
            Assert.AreEqual(abstractFoo.PureFunction2(ref ok), 15);
        }
    }

    [Test]
    public void TestANSI()
    {
        using (var foo = new Foo())
        {
            Assert.That(foo.ANSI, Is.EqualTo("ANSI"));
        }
    }

    [Test]
    public void TestMoveOperatorToClass()
    {
        // Unary operator
        using (var unary = new TestMoveOperatorToClass() { A = 4, B = 7 })
        {
            var unaryMinus = -unary;

            Assert.That(unaryMinus.A, Is.EqualTo(-unary.A));
            Assert.That(unaryMinus.B, Is.EqualTo(-unary.B));
        }

        // Binary operator
        using (var bin = new TestMoveOperatorToClass { A = 4, B = 7 })
        {
            using (var bin1 = new TestMoveOperatorToClass { A = 5, B = 10 })
            {
                var binSum = bin + bin1;

                Assert.That(binSum.A, Is.EqualTo(bin.A + bin1.A));
                Assert.That(binSum.B, Is.EqualTo(bin.B + bin1.B));
            }
        }

        // Multiple argument operator
        using (var multiArg = new TestMoveOperatorToClass { A = 4, B = 7 })
        {
            var multiArgStar = multiArg * 2;
            Assert.That(multiArgStar, Is.EqualTo(8));
        }
    }

    [Test]
    public void TestMoveFunctionToClass()
    {
        using (var common = new Common())
            Assert.That(Common.Test(common), Is.EqualTo(5));
    }

    [Test]
    public void TestMethodWithFixedInstance()
    {
        var bar = new Bar2 { A = 1, B = 2, C = 3 };
        using (Foo2 foo = bar.NeedFixedInstance)
        {
            Assert.AreEqual(foo.A, 1);
            Assert.AreEqual(foo.B, 2);
            Assert.AreEqual(foo.C, 3);
        }
    }

    [Test]
    public void TestConversionOperator()
    {
        var bar = new Bar2 { A = 1, B = 2, C = 3 };
        using (Foo2 foo = bar)
        {
            Assert.That(1, Is.EqualTo(foo.A));
            Assert.That(2, Is.EqualTo(foo.B));
            Assert.That(3, Is.EqualTo(foo.C));
        }
        using (var bar2Nested = new Bar2.Nested())
        {
            int bar2NestedInt = bar2Nested;
            Assert.That(bar2NestedInt, Is.EqualTo(300));
        }

        int bar2Int = new Bar2();
        Assert.That(bar2Int, Is.EqualTo(500));
    }

    [Test]
    public void TestDelegates()
    {
        using (var delegates = new TestDelegates())
        {
            var doubleSum = delegates.A(2) + delegates.B(2);
            Assert.AreEqual(8, doubleSum);

            var stdcall = delegates.StdCall(i => i);
            Assert.AreEqual(1, stdcall);

            var cdecl = delegates.CDecl(i => i);
            Assert.AreEqual(1, cdecl);

            var emptydelegeate = delegates.MarshalNullDelegate;
            Assert.AreEqual(emptydelegeate, null);
        }
    }

    [Test]
    public void TestUnion()
    {
        Hello.NestedPublic nestedPublic = new Hello.NestedPublic();
        nestedPublic.J = 5;
        Assert.That(nestedPublic.L, Is.EqualTo(5));
        Assert.That(nestedPublic.G, Is.Not.EqualTo(0));
        using (var nestedUnionWithNested = new NestedUnionWithNested())
        {
            nestedUnionWithNested.NestedField1 = 50;
            Assert.That(nestedUnionWithNested.UnionField, Is.EqualTo(50));
        }
    }

    [Test]
    public void TestNestedAnonymousTypes()
    {
        using (TestNestedTypes testNestedTypes = new TestNestedTypes())
        {
            testNestedTypes.ToVerifyCorrectLayoutBefore = 5;
            Assert.That(testNestedTypes.ToVerifyCorrectLayoutBefore, Is.EqualTo(5));
            testNestedTypes.I = 10;
            Assert.That(testNestedTypes.I, Is.EqualTo(10));
            testNestedTypes.C = 'D';
            Assert.That(testNestedTypes.C, Is.EqualTo('D'));
            testNestedTypes.ToVerifyCorrectLayoutAfter = 15;
            Assert.That(testNestedTypes.ToVerifyCorrectLayoutAfter, Is.EqualTo(15));
        }
    }

    [Test]
    public void TestPropertyChains()
    {
        var bar2 = new Bar2();
        bar2.PointerToStruct = new Bar { A = 15 };
        Assert.That(bar2.PointerToStruct.A, Is.EqualTo(15));
    }

    [Test]
    public void TestStaticClasses()
    {
        Type staticClassType = typeof(TestStaticClass);
        // Only static class can be both abstract and sealed
        Assert.IsTrue(staticClassType.IsAbstract && staticClassType.IsSealed);
        Assert.That(TestStaticClass.Add(1, 2), Is.EqualTo(3));
        Assert.That(TestStaticClass.OneTwoThree, Is.EqualTo(123));
        Assert.That(TestStaticClassDerived.Foo, Is.EqualTo(0));
        TestNotStaticClass.StaticFunction.GetHashCode();
    }

    [Test]
    public void TestCopyConstructor()
    {
        using (Foo foo = new Foo { A = 5, B = 5.5f })
        {
            Assert.That(foo.Init, Is.EqualTo(20));
            using (var copyFoo = new Foo(foo))
            {
                Assert.That(foo.A, Is.EqualTo(copyFoo.A));
                Assert.That(foo.B, Is.EqualTo(copyFoo.B));
            }
        }

        using (var testCopyConstructorRef = new TestCopyConstructorRef { A = 10, B = 5 })
        {
            using (var copyBar = new TestCopyConstructorRef(testCopyConstructorRef))
            {
                Assert.That(testCopyConstructorRef.A, Is.EqualTo(copyBar.A));
                Assert.That(testCopyConstructorRef.B, Is.EqualTo(copyBar.B));
            }
        }

        using (var original = new HasCopyAndMoveConstructor(5))
        {
            using (var copy = new HasCopyAndMoveConstructor(original))
            {
                Assert.That(copy.Field, Is.EqualTo(original.Field));
            }
        }
    }

    [Test]
    public void TestCharMarshalling()
    {
        using (Foo2 foo2 = new Foo2())
        {
            for (char c = char.MinValue; c <= sbyte.MaxValue; c++)
                Assert.That(foo2.TestCharMarshalling(c), Is.EqualTo(c));
            Assert.Catch<OverflowException>(() => foo2.TestCharMarshalling('ж'));
        }
    }

    [Test]
    public void TestIndexers()
    {
        using (var indexedProperties = new TestIndexedProperties())
        {
            Assert.AreEqual(1, indexedProperties[0]);
            Assert.AreEqual(1, indexedProperties["foo"]);
            indexedProperties[0] = 2;
            Assert.AreEqual(2, indexedProperties[0]);
            indexedProperties[0f] = 3;
            Assert.AreEqual(3, indexedProperties[0f]);
            var properties = indexedProperties[(byte)0];
            Assert.AreEqual(0, properties.Field);
            var newProperties = new TestProperties();
            newProperties.Field = 4;
            indexedProperties[(byte)0] = newProperties;
            Assert.AreEqual(4, indexedProperties[(byte)0].Field);
            newProperties = indexedProperties[(short)0];
            Assert.AreEqual(4, newProperties.Field);
            newProperties.Field = 5;
            Assert.AreEqual(5, indexedProperties[(byte)0].Field);
            newProperties.get();
            newProperties.set(0);
            newProperties.Get();
            newProperties.Set(0);

            var bar = new Bar { A = 5 };
            indexedProperties[0u] = bar;
            Assert.That(bar.A, Is.EqualTo(indexedProperties[0u].A));
            indexedProperties[(ushort)0] = bar;
            Assert.That(bar.A, Is.EqualTo(indexedProperties[(ushort)0].A));

            using (var foo = new Foo())
            {
                var bar2 = new Bar { A = 10 };
                indexedProperties[foo] = bar2;
                Assert.That(bar2.A, Is.EqualTo(indexedProperties[foo].A));
            }
        }
    }

    [Test]
    public void TestOperators()
    {
        using (var @class = new ClassWithOverloadedOperators())
        {
            char @char = @class;
            Assert.That(@char, Is.EqualTo(1));
            short @short = @class;
            Assert.That(@short, Is.EqualTo(3));
        }
        using (var @class = new ClassWithOverloadedOperators())
        {
            int classInt = @class;
            Assert.That(classInt, Is.EqualTo(2));
        }
    }

    [Test]
    public void TestFunctions()
    {
        var ret = Common.Function;
        Assert.That(ret, Is.EqualTo(5));

        Common.FuncWithTypeAlias(0);
    }

    [Test]
    public void TestProperties()
    {
        // Test field property
        using (var prop = new TestProperties())
        {
            Assert.That(prop.Field, Is.EqualTo(0));
            prop.Field = 10;
            Assert.That(prop.Field, Is.EqualTo(10));

            // Test getter/setter property
            prop.Field = 20;
            Assert.That(prop.FieldValue, Is.EqualTo(20));
            prop.FieldValue = 10;
            Assert.That(prop.FieldValue, Is.EqualTo(10));

            prop.GetterAndSetterWithTheSameName = 25;
            Assert.That(prop.GetterAndSetterWithTheSameName, Is.EqualTo(25));

            prop.SetterReturnsBoolean = 35;
            Assert.That(prop.SetterReturnsBoolean, Is.EqualTo(35));
            Assert.That(prop.SetSetterReturnsBoolean(35), Is.False);
            Assert.That(prop.SetSetterReturnsBoolean(40), Is.True);

            prop.VirtualSetterReturnsBoolean = 45;
            Assert.That(prop.VirtualSetterReturnsBoolean, Is.EqualTo(45));
            Assert.That(prop.SetVirtualSetterReturnsBoolean(45), Is.False);
            Assert.That(prop.SetVirtualSetterReturnsBoolean(50), Is.True);

            Assert.That(prop.nestedEnum(), Is.EqualTo(5));
            Assert.That(prop.nestedEnum(55), Is.EqualTo(55));

            Assert.That(prop.Get32Bit, Is.EqualTo(10));
            Assert.That(prop.ConstRefField, Is.EqualTo(prop.Field));
            Assert.That(prop.IsEmpty, Is.EqualTo(prop.Empty));

            Assert.That(prop.VirtualGetter, Is.EqualTo(15));

            Assert.That(prop.StartWithVerb, Is.EqualTo(25));
            prop.StartWithVerb = 5;

            Assert.That(prop.Contains('a'), Is.EqualTo(prop.Contains("a")));

            Assert.That(prop.conflict, Is.EqualTo(CommonTest.TestProperties.Conflict.Value1));
            prop.conflict = CommonTest.TestProperties.Conflict.Value2;
            Assert.That(prop.conflict, Is.EqualTo(CommonTest.TestProperties.Conflict.Value2));

            prop.Callback = x => 4 * x;
            Assert.That(prop.Callback(5), Is.EqualTo(20));

            Assert.That(prop.ArchiveName, Is.EqualTo(20));
        }
        using (var prop = new HasOverridenSetter())
        {
            Assert.That(prop.VirtualGetter, Is.EqualTo(20));
            prop.SetVirtualGetter(5);
        }
    }

    [Test]
    public void TestVariable()
    {
        // Test field property
        using (var @var = new TestVariables())
        {
            @var.SetValue(10);
        }
        Assert.That(TestVariables.VALUE, Is.EqualTo(10));
    }

    [Test]
    public void TestWideStrings()
    {
        using (var ws = new TestWideStrings())
        {
            var s = ws.WidePointer;
            Assert.That(ws.WidePointer, Is.EqualTo("Hello"));
            Assert.That(ws.WideNullPointer, Is.EqualTo(null));
        }
    }

    [Test]
    public unsafe void TestArraysPointers()
    {
        var values = MyEnum.A;
        using (var arrays = new TestArraysPointers(ref values, 1))
        {
            Assert.That(arrays.Value, Is.EqualTo(MyEnum.A));
        }
    }

    [Test]
    public unsafe void TestGetterSetterToProperties()
    {
        using (var @class = new TestGetterSetterToProperties())
        {
            Assert.That(@class.Width, Is.EqualTo(640));
            Assert.That(@class.Height, Is.EqualTo(480));
        }
    }

    [Test]
    public unsafe void TestSingleArgumentCtorToCastOperator()
    {
        using (var classA = new ClassA(10))
        {
            ClassB classB = classA;
            Assert.AreEqual(classA.Value, classB.Value);
            ClassC classC = (ClassC)classB;
            Assert.AreEqual(classB.Value, classC.Value);
        }
    }

    [Test]
    public unsafe void TestFieldRef()
    {
        using (var classD = new ClassD(10))
        {
            var fieldRef = classD.Field;
            fieldRef.Value = 20;
            Assert.AreEqual(20, classD.Field.Value);
        }
    }

    [Test]
    public unsafe void TestDecltype()
    {
        int ret = Common.TestDecltype;
        Assert.AreEqual(0, ret);
    }

    [Test]
    public unsafe void TestNullPtrType()
    {
        void* ret = Common.TestNullPtrTypeRet;
        Assert.AreEqual(IntPtr.Zero, new IntPtr(ret));
    }

    [Test]
    public void TestCtorByValue()
    {
        var bar = new Bar { A = 4, B = 5.5f };
        using (var foo2 = new Foo2 { C = 4, ValueTypeField = bar })
        {
            var result = foo2 << 2;
            Assert.AreEqual(foo2.C << 2, result.C);
            Assert.AreEqual(bar.A << 2, result.ValueTypeField.A);
            Assert.AreEqual(bar.B, result.ValueTypeField.B);
        }
    }

    [Test]
    public void TestMarshalUnattributedDelegate()
    {
        using (TestDelegates testDelegates = new TestDelegates())
        {
            testDelegates.MarshalUnattributedDelegate(i => i);
        }
    }

    [Test]
    public void TestPassAnonymousDelegate()
    {
        using (var testDelegates = new TestDelegates())
        {
            int value = testDelegates.MarshalAnonymousDelegate(i => i * 2);
            Assert.AreEqual(2, value);
            int value5 = testDelegates.MarshalAnonymousDelegate5(i => i * 2);
            Assert.AreEqual(4, value5);
            int value6 = testDelegates.MarshalAnonymousDelegate6(i => i * 2);
            Assert.AreEqual(6, value6);
        }
    }

    [Test]
    public void TestGetAnonymousDelegate()
    {
        using (var testDelegates = new TestDelegates())
        {
            var @delegate = testDelegates.MarshalAnonymousDelegate4;
            int value = @delegate.Invoke(1);
            Assert.AreEqual(2, value);
        }
    }

    [Test]
    public void TestFixedArrays()
    {
        using (var foo = new Foo())
        {
            var array = new[] { 1, 2, 3 };
            foo.FixedArray = array;
            for (int i = 0; i < foo.FixedArray.Length; i++)
                Assert.That(array[i], Is.EqualTo(foo.FixedArray[i]));
        }
    }

    [Test]
    public void TestInternalCtorAmbiguity()
    {
        using (var invokesInternalCtorAmbiguity = new InvokesInternalCtorAmbiguity())
        {
            invokesInternalCtorAmbiguity.InvokeInternalCtor();
        }
    }

    [Test]
    public void TestEqualityOperator()
    {
#pragma warning disable 1718 // Comparison made to same variable; did you mean to compare something else?

        using (var foo = new Foo { A = 5, B = 5.5f })
        {
            Assert.IsTrue(foo == foo);
            using (var notEqual = new Foo { A = 5, B = 5.6f })
            {
                Assert.IsTrue(notEqual != foo);
            }
            Assert.IsTrue(foo != null);
        }
        var bar = new Bar { A = 5, B = 5.5f };
        Assert.IsTrue(bar == bar);
        Assert.IsFalse(new Bar { A = 5, B = 5.6f } == bar);
#if !__MonoCS__
        using (var differentConstOverloads = new DifferentConstOverloads())
        {
            DifferentConstOverloads other = null;
            Assert.IsTrue(differentConstOverloads != other);
        }
#endif

#pragma warning restore 1718
    }

    [Test]
    public void TestFriendOperator()
    {
        using (HasFriend h1 = 5)
        {
            using (HasFriend h2 = 10)
            {
                Assert.AreEqual(15, (h1 + h2).M);
                Assert.AreEqual(-5, (h1 - h2).M);
            }
        }
    }

    [Test]
    public void TestOperatorOverloads()
    {
        var differentConstOverloads = new DifferentConstOverloads();
        var differentConstOverloads1 = new DifferentConstOverloads();
        Assert.IsTrue(differentConstOverloads == differentConstOverloads1);
        // HACK: don't replace with a using because it triggers a bug in the Mono compiler
        // https://travis-ci.org/github/mono/CppSharp/jobs/674224017#L997
        differentConstOverloads1.Dispose();
        Assert.IsTrue(differentConstOverloads == 5);
        Assert.IsFalse(differentConstOverloads == 4);
        Assert.IsTrue(differentConstOverloads == "abcde");
        Assert.IsFalse(differentConstOverloads == "abcd");
        differentConstOverloads.Dispose();
    }

    [Test]
    public void TestPacking()
    {
        foreach (var testPacking in new TestPacking[] { new TestPacking1(), new TestPacking2(),
            new TestPacking4(), new TestPacking8() })
        {
            testPacking.I1 = 2;
            testPacking.I2 = 4;
            testPacking.B = true;

            Assert.That(testPacking.I1, Is.EqualTo(2));
            Assert.That(testPacking.I2, Is.EqualTo(4));
            Assert.That(testPacking.B, Is.EqualTo(true));
            testPacking.Dispose();
        }
    }

    [Test]
    public void TestRenamingVariableNamedAfterKeyword()
    {
        Assert.AreEqual(10, Foo.Unsafe);
    }

    [Test]
    public void TestMarshallingEmptyType()
    {
        using (ReturnsEmpty returnsEmpty = new ReturnsEmpty())
        {
            returnsEmpty.Empty.Dispose();
        }
    }

    [Test]
    public void TestOutTypeClassesPassTry()
    {
        RefTypeClassPassTry refTypeClassPassTry;
        Common.FuncTryRefTypeOut(out refTypeClassPassTry);
        Common.FuncTryRefTypePtrOut(out refTypeClassPassTry);

        ValueTypeClassPassTry valueTypeClassPassTry;
        Common.FuncTryValTypeOut(out valueTypeClassPassTry);
        Common.FuncTryValTypePtrOut(out valueTypeClassPassTry);
    }

    [Test]
    public void TestVirtualReturningClassWithCharField()
    {
        using (var hasVirtualReturningHasProblematicFields = new HasVirtualReturningHasProblematicFields())
        {
            var hasProblematicFields = hasVirtualReturningHasProblematicFields.ReturnsProblematicFields;
            Assert.That(hasProblematicFields.B, Is.EqualTo(false));
            hasProblematicFields.B = true;
            Assert.That(hasProblematicFields.B, Is.EqualTo(true));
            Assert.That(hasProblematicFields.C, Is.EqualTo(char.MinValue));
            hasProblematicFields.C = 'a';
            Assert.That(hasProblematicFields.C, Is.EqualTo('a'));
        }
    }

    [Test]
    public void TestDisposingCustomDerivedFromVirtual()
    {
        using (new CustomDerivedFromVirtual())
        {
        }
    }

    [Test]
    public void TestIncompleteCharArray()
    {
        Assert.That(Foo.CharArray, Is.EqualTo("abc"));
    }

    [Test]
    public void TestPassingNullToRef()
    {
        using (var foo = new Foo())
        {
            Assert.Catch<ArgumentNullException>(() => foo.TakesRef(null));
        }
    }

    [Test]
    public void TestPassingNullToValue()
    {
        Assert.Catch<ArgumentNullException>(() => new Bar((Foo)null));
    }

    [Test]
    public void TestNonTrivialDtorInvocation()
    {
        using (var nonTrivialDtor = new NonTrivialDtor())
        {
        }
        Assert.IsTrue(NonTrivialDtor.dtorCalled);
    }

    [Test]
    public void TestFixedCharArray()
    {
        using (var foo = new Foo())
        {
            foo.FixedCharArray = new char[] { 'a', 'b', 'c' };
            Assert.That(foo.FixedCharArray[0], Is.EqualTo('a'));
            Assert.That(foo.FixedCharArray[1], Is.EqualTo('b'));
            Assert.That(foo.FixedCharArray[2], Is.EqualTo('c'));
        }
    }

    [Test]
    public void TestStaticFields()
    {
        Assert.That(Foo.ReadWrite, Is.EqualTo(15));
        Foo.ReadWrite = 25;
        Assert.That(Foo.ReadWrite, Is.EqualTo(25));
        Foo.StaticField.A = 20;
        Assert.That(Foo.StaticField.A, Is.EqualTo(20));
    }

    [Test]
    public void TestStdString()
    {
        // when C++ memory is deleted, it's only marked as free but not immediadely freed
        // this can hide memory bugs while marshalling
        // so let's use a long string to increase the chance of a crash right away
        const string t = @"This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. 
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.";
        using (var hasStdString = new HasStdString())
        {
            Assert.That(hasStdString.TestStdString(t), Is.EqualTo(t + "_test"));
            hasStdString.S = t;
            Assert.That(hasStdString.S, Is.EqualTo(t));
            Assert.That(hasStdString.StdString, Is.EqualTo(t));
            Assert.That(hasStdString.StdString, Is.EqualTo(t));
        }
    }

    [Test]
    public void TestStdStringPassedByValue()
    {
        // when C++ memory is deleted, it's only marked as free but not immediadely freed
        // this can hide memory bugs while marshalling
        // so let's use a long string to increase the chance of a crash right away
        const string t = @"This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. 
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.
This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string. This is a very long string.";
        using (var hasStdString = new HasStdString())
        {
            Assert.That(hasStdString.TestStdStringPassedByValue(t), Is.EqualTo(t + "_test"));
            hasStdString.S = t;
            Assert.That(hasStdString.S, Is.EqualTo(t));
            Assert.That(hasStdString.StdString, Is.EqualTo(t));
            Assert.That(hasStdString.StdString, Is.EqualTo(t));
        }
    }

    public void TestNullStdString()
    {
        using (var hasStdString = new HasStdString())
        {
            Assert.That(() => hasStdString.TestStdString(null), Throws.ArgumentNullException);
        }
    }

    [Test]
    public void TestUTF8()
    {
        var strings = new[] { "ЀЁЂЃЄЅІЇЈЉЊЋЌЍЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюя" +
                              "ѐёђѓєѕіїјљњћќѝўџѠѡѢѣѤѥѦѧѨѩѪѫѬѭѮѯѰѱѲѳѴѵѶѷѸѹѺѻѼѽѾѿҀҁҊҋҌҍҎҏҐґҒғҔҕҖҗҘҙҚқҜҝҞҟҠҡҢңҤҥҦҧҨҩ" +
                              "ҪҫҬҭҮүҰұҲҳҴҵҶҷҸҹҺһҼҽҾҿӀӁӂӃӄӅӆӇӈӉӊӋӌӍӎӏӐӑӒӓӔӕӖӗӘәӚӛӜӝӞӟӠӡӢӣӤӥӦӧӨөӪӫӬӭӮӯӰӱӲӳӴӵӶӷӸӹӺӻӼӽ" +
                              "ӾӿԀԁԂԃԄԅԆԇԈԉԊԋԌԍԎԏԐԑԒԓ",

                              "აბგდევზთიკლმნოპჟრსტუფქღყშჩცძწჭხჯჰჱჲჳჴჵჶჷჸჹჺ",

                              "ԱԲԳԴԵԶԷԸԹԺԻԼԽԾԿՀՁՂՃՄՅՆՇՈՉՊՋՌՍՎՏՐՑՒՓՔՕՖՙաբգդեզէըթժիլխծկհձղճմյնշոչպջռսվտրցւփքօֆև",

                              "々〆〱〲〳〴〵〻〼ぁあぃいぅうぇえぉおかがきぎくぐけげこごさざしじすずせぜそぞただちぢっつづて" +
                              "でとどなにぬねのはばぱひびぴふぶぷへべぺほぼぽまみむめもゃやゅゆょよらりるれろゎわゐゑをんゔゕ" +
                              "ゖゝゞゟァアィイゥウェエォオカガキギクグケゲコゴサザシジスズセゼソゾタダチヂッツヅテデトドナニ" +
                              "ヌネノハバパヒビピフブプヘベペホボポマミムメモャヤュユョヨラリルレロヮワヰヱヲンヴヵヶヷヸヹヺ" +
                              "ーヽヾヿㇰㇱㇲㇳㇴㇵㇶㇷㇸㇹㇺㇻㇼㇽㇾㇿ",

                              "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzªµºÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞ" +
                              "ßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿĀāĂ㥹ĆćĈĉĊċČčĎďĐđĒēĔĕĖėĘęĚěĜĝĞğĠġĢģĤĥĦħĨĩĪīĬĭĮįİıIJijĴĵ" +
                              "ĶķĸĹĺĻļĽľĿŀŁłŃńŅņŇňʼnŊŋŌōŎŏŐőŒœŔŕŖŗŘřŚśŜŝŞşŠšŢţŤťŦŧŨũŪūŬŭŮůŰűŲųŴŵŶŷŸŹźŻżŽžſƀƁƂƃƄƅƆƇƈƉƊ" +
                              "ƋƌƍƎƏƐƑƒƓƔƕƖƗƘƙƚƛƜƝƞƟƠơƢƣƤƥƦƧƨƩƪƫƬƭƮƯưƱƲƳƴƵƶƷƸƹƺƻƼƽƾƿǀǁǂǃDŽDždžLJLjljNJNjnjǍǎǏǐǑǒǓǔǕǖǗǘǙǚǛǜǝ" +
                              "ǞǟǠǡǢǣǤǥǦǧǨǩǪǫǬǭǮǯǰDZDzdzǴǵǶǷǸǹǺǻǼǽǾǿȀȁȂȃȄȅȆȇȈȉȊȋȌȍȎȏȐȑȒȓȔȕȖȗȘșȚțȜȝȞȟȠȡȢȣȤȥȦȧȨȩȪȫȬȭȮȯȰȱȲȳ" +
                              "ȴȵȶȷȸȹȺȻȼȽȾȿɀɁɂɃɄɅɆɇɈɉɊɋɌɍɎɏḀḁḂḃḄḅḆḇḈḉḊḋḌḍḎḏḐḑḒḓḔḕḖḗḘḙḚḛḜḝḞḟḠḡḢḣḤḥḦḧḨḩḪḫḬḭḮḯḰḱḲḳḴḵḶḷḸḹḺḻḼḽ" +
                              "ḾḿṀṁṂṃṄṅṆṇṈṉṊṋṌṍṎṏṐṑṒṓṔṕṖṗṘṙṚṛṜṝṞṟṠṡṢṣṤṥṦṧṨṩṪṫṬṭṮṯṰṱṲṳṴṵṶṷṸṹṺṻṼṽṾṿẀẁẂẃẄẅẆẇẈẉẊẋẌẍẎẏẐẑẒẓẔẕẖẗẘẙẚ" +
                              "ẛẞẠạẢảẤấẦầẨẩẪẫẬậẮắẰằẲẳẴẵẶặẸẹẺẻẼẽẾếỀềỂểỄễỆệỈỉỊịỌọỎỏỐốỒồỔổỖỗỘộỚớỜờỞởỠỡỢợỤụỦủỨứỪừỬửỮữỰựỲỳỴỵỶỷỸỹ" +
                              "ⱠⱡⱢⱣⱤⱥⱦⱧⱨⱩⱪⱫⱬⱭⱱⱲⱳⱴⱵⱶⱷ" };
        foreach (var @string in strings)
        {
            Assert.That(Common.TakeReturnUTF8(@string), Is.EqualTo(@string));
        }
    }

    private class CustomDerivedFromVirtual : AbstractWithVirtualDtor
    {
        public override void Abstract()
        {
        }
    }

    [Test]
    public void TestFuncWithUnionParam()
    {
        var ut = new UnionT();
        ut.C = 20;
        var v = Common.FuncUnion(ut);
        Assert.AreEqual(20, v);
    }

    [Test]
    public void TestVirtualFuncWithStringParams()
    {
        using (var VirtFuncWithStringParam = new ImplementsVirtualFunctionsWithStringParams())
        {
            VirtFuncWithStringParam.PureVirtualFunctionWithStringParams("anyRandomString1", "anyRandomString2");
            Assert.That(VirtFuncWithStringParam.VirtualFunctionWithStringParam("anyRandomString").Equals(5));
        }
    }

    [Test]
    public void TestOverriddenSetter()
    {
        var propertyInfo = typeof(HasOverridenSetter).GetProperty("Virtual",
            BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);
        Assert.That(propertyInfo, Is.Not.Null);
        Assert.That(propertyInfo.CanWrite);
    }

    [Test]
    public void TestVirtualFunctionWithBoolParams()
    {
        using (var hasVirtualFunctionWithBoolParam = new HasVirtualFunctionWithBoolParams())
            Assert.That(hasVirtualFunctionWithBoolParam.VirtualFunctionWithBoolParamAndReturnsBool(true));
    }

    [Test]
    public void TestRefToPrimitiveInSetter()
    {
        using (var testProperties = new TestProperties())
        {
            const double value = 5.5;
            testProperties.RefToPrimitiveInSetter = value;
            Assert.That(testProperties.RefToPrimitiveInSetter, Is.EqualTo(value));
        }
    }

    [Test]
    public void TestReturnChar16()
    {
        using (var foo = new Foo())
        {
            Assert.That(foo.ReturnChar16(), Is.EqualTo('a'));
        }
    }

    [Test]
    public void TestStructWithCopyCtorByValue()
    {
        using (var structWithCopyCtor = new StructWithCopyCtor())
        {
            structWithCopyCtor.MBits = 10;
            var ret = Common.TestStructWithCopyCtorByValue(structWithCopyCtor);
            Assert.That(ret, Is.EqualTo(10));
        }
    }

    [Test]
    public void TestNonPrimitiveFixedArrays()
    {
        using (var nonPrimitiveFixedArray = new TestFixedNonPrimitiveArrays())
        {
            nonPrimitiveFixedArray.NonPrimitiveTypeArray = new NonPrimitiveType[]
            {
                new NonPrimitiveType { foo = 1 },
                new NonPrimitiveType { foo = 2 },
                new NonPrimitiveType { foo = 3 }
            };

            Assert.AreEqual(3, nonPrimitiveFixedArray.NonPrimitiveTypeArray.Length);

            Assert.AreEqual(1, nonPrimitiveFixedArray.NonPrimitiveTypeArray[0].Foo);
            Assert.AreEqual(2, nonPrimitiveFixedArray.NonPrimitiveTypeArray[1].Foo);
            Assert.AreEqual(3, nonPrimitiveFixedArray.NonPrimitiveTypeArray[2].Foo);
        }
    }

    [Test]
    public void TestPointerToTypedefPointerTestMethod()
    {
        using (PointerToTypedefPointerTest lp = new PointerToTypedefPointerTest())
        {
            lp.Val = 50;
            Common.PointerToTypedefPointerTestMethod(lp, 100);
            Assert.AreEqual(100, lp.Val);
        }
    }

    [Test]
    public void TestTakeTypedefedMappedType()
    {
        const string @string = "string";
        Assert.That(Common.TakeTypedefedMappedType(@string), Is.EqualTo(@string));
    }

    [Test]
    public void TestPointerToPrimitiveTypedefPointerTestMethod()
    {
        int a = 50;
        Common.PointerToPrimitiveTypedefPointerTestMethod(ref a, 100);
        Assert.AreEqual(100, a);
    }

    [Test]
    public void TestConflictName()
    {
        using (var system = new CommonTest.System())
        {
            Common.TakeConflictName(system);
            Assert.That(system.Field1, Is.EqualTo(5));
            Assert.That(system.Field2, Is.EqualTo(10));
        }
    }

    [Test]
    public void TestReturnByValueWithReturnParam()
    {
        using (var returnByValueWithReturnParam = ReturnByValueWithReturnParamFactory.Generate())
        {
            Assert.That(returnByValueWithReturnParam.UseCount, Is.EqualTo(1));
        }
    }

    [Test, Ignore("This was exposed by another bug and doesn't work yet.")]
    public void TestFreeFunctionReturnByValue()
    {
        using (var system = Common.FreeFunctionReturnByValue)
        {
            Assert.That(system.Field1, Is.EqualTo(5));
            Assert.That(system.Field2, Is.EqualTo(10));
        }
    }
}