public void TestAdaptation()
{
AdaptationTestBase t = GoInterface <AdaptationTestBase, AdaptationTests1> .ForceFrom(new AdaptationTests1());
t.Passthrough(1, 2, 3, "4");
int i; double d; object o; string s;
Assert.That(t.Passthrough(out i, out d, out o, out s));
Assert.AreEqual(i, 1);
Assert.AreEqual(d, 2);
Assert.AreEqual(o, 3);
Assert.AreEqual(s, "4");
Assert.That(t.Enlarge2int((short)-1, true));
Assert.That(t.Enlarge2int((ushort)0xFFFF, false));
Assert.That(t.Enlarge2uint((byte)0xFF));
Assert.That(t.Enlarge2uint((ushort)0xFFFF));
Assert.That(t.Enlarge2long(-1, true));
Assert.That(t.Enlarge2long((ushort)0xFFFF, false));
Assert.That(t.Enlarge2long((uint)0xFFFFFFFF, false));
Assert.That(t.Enlarge2float(1));
Assert.That(t.Enlarge2double(1));
Assert.That(t.Box((int)1));
Assert.That(t.Box(1.0));
Assert.That(t.Renamed());
t = GoInterface <AdaptationTestBase, AdaptationTests2> .ForceFrom(new AdaptationTests2());
t.Covariant(out i);
Assert.That(i == 1);
IDisposable idisp;
t.Covariant(out idisp);
Assert.That(idisp is MemoryStream);
i = 0;
Assert.That(t.Covariant2(ref i));
Assert.AreEqual(1, i);
s = "1";
Assert.That(t.Invariant(ref s));
Assert.That(t.Invariant2(s));
Assert.That(t.Contravariant("1"));
Assert.That(t.Contravariant(new MemoryStream()));
Assert.That(t.Contravariant2(1));
i = 1;
Assert.That(t.Contravariant3(ref i));
t.CovariantReturn();
Assert.That(t.CovariantReturn2() is bool);
Assert.That(t.CovariantReturn3().ToString() == "true");
Assert.AreEqual(t.CovariantReturn4(), 1.0f);
Assert.That(t.DroppedParam(1));
Assert.That(t.DroppedParam2());
Assert.That(t.DroppedParam3("1"));
Assert.That(t.DefaultParam());
}
public void InheritanceTest()
{
object something = new FooB();
FooBase foo = GoInterface <FooBase> .From(something);
Assert.That(foo.Foo() == "Foo");
Assert.That(foo.Bar() == "Bar");
Assert.That(foo.Baz(1) == "Baz");
Assert.That(((IBaz)foo).Baz(false) == "Baz");
Assert.That(foo.Baz() == "Baz");
something = new FooB();
IBaz baz = GoInterface <IBaz> .ForceFrom(something);
Assert.That(((IBar)baz).Bar() == "Bar");
Assert.That(((IBar2)baz).Bar() == "Bar");
Assert.That(baz.Baz() == "Baz");
}
public void TestOverloading()
{
bool correct;
int x = 1;
object o;
IOverloadingTest i = GoInterface <IOverloadingTest> .ForceFrom(new OverloadingTest());
Assert.That(i.MoreMatchingArgsAreBetter(1, 2));
Assert.That(i.MoreMatchingArgsAreBetter2(1, 2, 3));
Assert.That(i.MinimumSizeRequired(1));
Assert.That(i.MinimumSizeRequired2(1));
Assert.That(i.SignedIsBetter(1));
Assert.That(i.SignedIsBetter2(1));
Assert.That(i.UnsignedIsBetter(1));
Assert.That(i.UnsignedIsBetter2(1));
Assert.That(i.IntIsBetter(1));
Assert.That(i.FloatIsBetter(1));
Assert.That(i.FloatIsBetter2(1.0f));
Assert.That(i.MissingOutput(1));
Assert.That(i.MissingOutput2());
Assert.That(i.MissingInput(1, 2, 3));
Assert.That(i.MissingInput2(1, 2));
Assert.That(i.MissingInputAndOutput(1, 2, 3));
Assert.That(i.OptionalParam(1, 2));
Assert.That(i.OptionalParam2(1, 2, 3));
Assert.That(i.RefMismatch(1));
Assert.That(i.RefMismatch2(1));
Assert.That(i.RefMismatch3(ref x));
Assert.That(i.RefMismatch4(ref x));
Assert.That(i.RefMismatch5(1));
Assert.That(i.Contravariance("1"));
Assert.That(i.Contravariance2(new MemoryStream()));
Assert.That(i.Contravariance3(new MemoryStream()));
Assert.That(i.Covariance(out x));
Assert.That(i.Covariance2(out o));
Assert.That(i.ReturnCovariance() is int && (int)i.ReturnCovariance() == 1);
Assert.That(i.ReturnCovariance2() == 1.0f);
i.ReturnCovariance3(out correct);
Assert.That(correct);
Assert.That(i.ChooseTheMatchingReturn(1));
Assert.That(i.IgnoreNonPublic(1));
}
public void TestAmbiguity()
{
IAmbig wrapped;
try {
wrapped = GoInterface <IAmbig> .From(new Ambig());
}
catch (InvalidCastException e)
{
if (e.Message.Contains("4 "))
{
return; // 4 ambiguous methods, just as expected
}
}
wrapped = GoInterface <IAmbig> .ForceFrom(new Ambig());
int a = 0;
Assert.ThrowsAny <MissingMethodException>(delegate() { wrapped.Strings("1", "2"); });
Assert.ThrowsAny <MissingMethodException>(delegate() { wrapped.RefMismatch(1, 2); });
Assert.ThrowsAny <MissingMethodException>(delegate() { wrapped.RefMismatch2(ref a, 2); });
Assert.ThrowsAny <MissingMethodException>(delegate() { wrapped.AmbigLarger(1); });
}
public static void DoBenchmark()
{
const int Iterations = 100000000;
// Measure the time it takes to instantiate ten versions of
// IReadOnlyList<T>. GoInterface is not able to create generic wrappers,
// so every time you wrap the same generic type with a different type
// parameter, GoInterface produces a completely separate wrapper. This
// is not good for performance, but at least it makes it easy for our
// benchmark to pick 10 "different" classes to create wrappers of.
//
// It is possible to wrap List<byte> not only as IReadOnlyList<byte>
// but also as any larger integer type, such as IReadOnlyList<int>.
// However, the wrapping of the GetEnumerator() methods doesn't work.
// List<byte>.GetEnumerator() returns IEnumerator<byte>, but
// IReadOnlyList<int>.GetEnumerator() returns IEnumerator<int>. There is
// no implicit conversion from IEnumerator<byte> to IEnumerator<int>,
// so GoInterface fails to wrap it. However, by using ForceFrom we get
// around this limitation, which still allows us to use the indexer and
// Count properties. If you call GetEnumerator(), though, you get a
// MissingMethodException.
//
// Note that if you run this part of the benchmark twice without
// exiting the program, the second time around it should take zero
// milliseconds. And the benchmark generally runs more slowly right
// after you reboot your computer.
SimpleTimer timer = new SimpleTimer();
var dummy0 = GoInterface <IReadOnlyList <byte> > .ForceFrom(new List <byte>());
int firstOne = timer.Restart();
var dummy1 = GoInterface <IReadOnlyList <short> > .ForceFrom(new List <byte>());
var dummy2 = GoInterface <IReadOnlyList <ushort> > .ForceFrom(new List <byte>());
var dummy3 = GoInterface <IReadOnlyList <int> > .ForceFrom(new List <byte>());
var dummy4 = GoInterface <IReadOnlyList <uint> > .ForceFrom(new List <byte>());
var dummy5 = GoInterface <IReadOnlyList <long> > .ForceFrom(new List <byte>());
var dummy6 = GoInterface <IReadOnlyList <ulong> > .ForceFrom(new List <byte>());
var dummy7 = GoInterface <IReadOnlyList <float> > .ForceFrom(new List <byte>());
var dummy8 = GoInterface <IReadOnlyList <double> > .ForceFrom(new List <byte>());
var dummy9 = GoInterface <IReadOnlyList <object> > .ForceFrom(new List <byte>());
int nineMore = timer.Millisec;
Console.WriteLine("First interface wrapped in {0}ms; nine more took {1}ms", firstOne, nineMore);
// Second test: measure how long it takes to wrap the same List<int>
// many times, using either GoInterface class.
var list = new List <int>();
list.Add(0);
list.Add(1);
list.Add(2);
list.Add(3);
IList <int> ilist;
IReadOnlyList <int> rolist;
GoInterface <IReadOnlyList <int> > .From(list); // ignore first call
timer.Restart();
int i = 0;
do
{
ilist = list; // normal interface assignment is pretty much a no-op
} while (++i < Iterations);
int wrapTest0 = timer.Restart();
i = 0;
do
{
rolist = GoInterface <IReadOnlyList <int> > .From(list);
} while (++i < Iterations);
int wrapTest1 = timer.Restart();
i = 0;
do
{
rolist = GoInterface <IReadOnlyList <int>, List <int> > .From(list);
} while (++i < Iterations);
int wrapTest2 = timer.Restart();
Console.WriteLine("Wrapper creation speed ({0} million times):", Iterations / 1000000);
Console.WriteLine("- {0} ms for normal .NET interfaces (no-op)", wrapTest0);
Console.WriteLine("- {0} ms for GoInterface<IReadOnlyList<int>>.From()", wrapTest1);
Console.WriteLine("- {0} ms for GoInterface<IReadOnlyList<int>,List<int>>.From()", wrapTest2);
int total0 = 0, total1 = 0, total2 = 0;
timer.Restart();
for (i = 0; i < Iterations; i++)
{
total0 += list[i & 3];
}
int callTestDirectCall = timer.Restart();
for (i = 0; i < Iterations; i++)
{
total1 += ilist[i & 3];
}
int callTestNormalInterface = timer.Restart();
for (i = 0; i < Iterations; i++)
{
total2 += rolist[i & 3];
}
int callTestGoInterface = timer.Restart();
Debug.Assert(total0 == total1 && total1 == total2);
Console.WriteLine("Time to call indexer of List<int> ({0} million times):", Iterations / 1000000);
Console.WriteLine("- {0} ms for direct calls (not through an interface)", callTestDirectCall);
Console.WriteLine("- {0} ms through IList<int> (normal interface)", callTestNormalInterface);
Console.WriteLine("- {0} ms through IReadOnlyList<int> (GoInterface)", callTestGoInterface);
}