RE: [MO-java-users] Modifying method parameters with DynaMock

[<Ext...@no...>]

Nathaniel, thanks very much - I can almost cut'n'paste the code :-)

> -----Original Message-----
> From: ext Nat Pryce [mailto:nat...@b1...]
> Sent: 02 July, 2003 18:02
> To: Hogan Mike (EXT-IBM/Espoo);
> moc...@li...
> Subject: Re: [MO-java-users] Modifying method parameters with DynaMock
>=20
>=20
> The Callable interface and the decorator/stub structure is designed to
> achieve exactly what you need.  If you want to mock a=20
> side-effect, create a
> decorator chain with a domain-specific stub that implements=20
> the side effect.
> It is easy to write the stub as an anonymous inner class in=20
> the body of the
> test, and then later extract it into a reusable class if you=20
> need it in more
> than one test.
>=20
> For example, in long-hand using the version 0.09 API:
>=20
> // Note: resultSetHandler and resultSet are final so they can=20
> be used by
> // the anonymous inner class
> final ResultSetHandler resultSetHandler =3D ....
> final Mock mockResultSet =3D new Mock(ResultSet.class);
>=20
> Mock mockSQLExecuter =3D new Mock(SQLExecuter.class);
>=20
> mockSQLExecuter.add(
>     new CallOnceExpectation(
>     new CallSignature( "execute", C.eq(  expectedSQL,=20
> expectedBindVariables,
> resultSetHandler ) ),
>     new VoidStub() {
>         public void getDescription() { " [calls back to
> resultSetHandler]"; }
>         public Object call( String methodName, Object[] args ) {
>             resultSetHandler.handle(=20
> (ResultSet)mockResultSet.proxy() );
>             return super.call( methodName, args ); // stubs=20
> the void result
>         }
>     } ) ) );
>=20
> In my experimental branch I have added an expect method to my=20
> branch that
> takes three parameters: a method name, argument constraints=20
> and a Callable
> stub.  This creates the CallOnceExpectation, NameMatcher,=20
> ArgumentMatcher
> around the stub, and so makes it more convenient to use=20
> domain-specific
> stubs in tests.
>=20
> I have also put some documentation about these=20
> interfaces/classes on the
> Mock Objects wiki, so check that out for more info.
>=20
> Regards,
>             Nat.
> _______________________
> Dr. Nathaniel Pryce
> B13media Ltd.
> http://www.b13media.com
> +44 (0)7712 526 661
>=20
> ----- Original Message -----
> From: <Ext...@no...>
> To: <moc...@li...>
> Sent: Wednesday, July 02, 2003 3:25 PM
> Subject: [MO-java-users] Modifying method parameters with DynaMock
>=20
>=20
> Hi,
>=20
> I want to "do something" with a parameter that is passed into=20
> a method that
> I am DynaMock'ing.  The interface is:
>=20
> public interface SqlExecutor {
>     public void execute(String sql, Iterator bindVariables,=20
> ResultSetHandler
> handler) throws SQLException;
> }
>=20
> and
>=20
> public interface ResultSetHandler {
>     public void handle(ResultSet resultSet) throws SQLException;
> }
>=20
> So, I create a DynaMock of SqlExecutor, my code under test=20
> passes in some
> implementation of ResultSetHandler, and I need the DynaMock to push a
> ResultSet into this ResultSetHandler implementation.
>=20
> Can DynaMock do this, or should I fall back on plain old=20
> expectation classes
> etc?
>=20
> Thanks,
> Mike.
>=20
>=20
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