public void FindCastToWorks()
{
var t = typeof(Cast1);
Assert.Equal(typeof(int), MethodInfoEx.FindCastToOperator(t, typeof(int)).ReturnType);
Assert.Equal(typeof(double), MethodInfoEx.FindCastToOperator(t, typeof(double)).ReturnType);
Assert.Equal(typeof(Cast2), MethodInfoEx.FindCastToOperator(t, typeof(Cast2)).ReturnType);
Assert.Null(MethodInfoEx.FindCastToOperator(t, typeof(string)));
Assert.Null(MethodInfoEx.FindCastToOperator(t, typeof(decimal)));
}
public void FindCastWorks()
{
var t1 = typeof(Cast1);
var t2 = typeof(Cast2);
Assert.Equal(typeof(int), MethodInfoEx.FindCastOperator(t1, typeof(int)).ReturnType);
Assert.Equal(typeof(double), MethodInfoEx.FindCastOperator(t1, typeof(double)).ReturnType);
Assert.Null(MethodInfoEx.FindCastToOperator(t1, typeof(string)));
Assert.Null(MethodInfoEx.FindCastToOperator(t1, typeof(decimal)));
Assert.Equal(typeof(int), MethodInfoEx.FindCastOperator(typeof(int), t2).GetParameterTypes()[0]);
Assert.Equal(typeof(double), MethodInfoEx.FindCastOperator(typeof(double), t2).GetParameterTypes()[0]);
Assert.Equal(t2, MethodInfoEx.FindCastOperator(t2, t1).GetParameterTypes()[0]);
Assert.Null(MethodInfoEx.FindCastOperator(typeof(string), t2));
Assert.Null(MethodInfoEx.FindCastOperator(typeof(decimal), t2));
Assert.Throws <AmbiguousMatchException>(() => MethodInfoEx.FindCastOperator(t1, t2));
}