public void InitializeWithNullMethodInfoThrows()
{
var anonymousFactory = new DelegatingMethodFactory();
Assert.Throws <ArgumentNullException>(() =>
new GenericMethod(null, anonymousFactory));
}
public void SutIsIMethod()
{
Action dummy = delegate { };
var anonymousFactory = new DelegatingMethodFactory();
var sut = new GenericMethod(dummy.Method, anonymousFactory);
Assert.IsAssignableFrom <IMethod>(sut);
}
public void FactoryIsCorrect()
{
var anonymousMethod = ((Action) delegate { }).Method;
var expectedFactory = new DelegatingMethodFactory();
var sut = new GenericMethod(anonymousMethod, expectedFactory);
var result = sut.Factory;
Assert.Equal(expectedFactory, result);
}
public void ParametersIsCorrect()
{
Action <int, double> dummy = delegate { };
var anonymousFactory = new DelegatingMethodFactory();
var expectedParameters = dummy.Method.GetParameters();
var sut = new GenericMethod(dummy.Method, anonymousFactory);
var result = sut.Parameters;
Assert.True(expectedParameters.SequenceEqual(result));
}
public void InvokeWithGenericMethodReturnsCorrectResult(Type targetType, int index, object values)
{
var method = (from mi in targetType
.GetMethods(BindingFlags.Static | BindingFlags.Public)
select mi).ElementAt(index);
var factory = new DelegatingMethodFactory();
factory.OnCreate = m => new StaticMethod(m);
var sut = new GenericMethod(method, factory);
var result = sut.Invoke((object[])values);
Assert.IsAssignableFrom(targetType, result);
}
public void InvokeWithGenericMethodThatCannotBeInferedThrows(Type targetType, int index, object values)
{
var method = (from mi in targetType
.GetMethods(BindingFlags.Static | BindingFlags.Public)
select mi).ElementAt(index);
var factory = new DelegatingMethodFactory();
factory.OnCreate = m => new StaticMethod(m);
var sut = new GenericMethod(method, factory);
var exception = Assert.Throws <TypeArgumentsCannotBeInferredException>(
() => sut.Invoke((object[])values));
Assert.Contains(method.Name, exception.Message);
}
