On Wednesday, 5 June 2013 at 13:19:33 UTC, Peter Lundgren wrote:
On Wednesday, 5 June 2013 at 07:17:50 UTC, Jacob Carlborg wrote:
I would suggestion using some kind of wrapper instead of doing
true monkey patching. Example:
class Wrapper
{
private Object o;
this (Object o) { this.o = o; }
auto opDispatch (string name, Args ...) (Args args)
{
// Use this function to "catch" all calls and forward
as necessary to "o"
}
}
http://dlang.org/operatoroverloading.html#Dispatch
That's a reasonable option too. I think I'd rather use deject.
The problem I'm trying to solve (and maybe this isn't as
important as I think) is that DMocks or deject + DMocks only
works on a subset of the language. I can't mock out free
function calls, private or final methods, or functions on
structs or unions (can I inject mocked structs using deject?).
What do I do when I want to mock out std.stdio or std.random?
Making mocks work with statical world of D could definitely be
done - the language has many useful tools like alias or mixins to
do that. I think that substitution here may be a problem. It'd
probably be required to use aliases instead of bare types in user
code, so types could be fully substituted. Mocking statically
linked methods is a similar problem - consider:
MyType a = new Mocker().mock!(MyType );
a.finalMethod()
will call MyType.finalMethod, not Mock!MyType.finalMethod. Using
aliases for defining types is a sollution but it requires changes
to user code. Maybe deject has a sollution to this problem.
