You have to assume that they could do this without "proving it" stupid test.
If they can bring two spacecraft in different orbits together in a single orbit, (something I believe they have done in their manned space program) then it is not so hart to believe that they could purposefully destroy an enemy spacecraft if the need arose.
Unfortunately, the test was probably used to prove to their internal naysaying politicians that the space technology they are developing for their manned space program has some military applications, and thus should be continued...
I still think it was a dumb thing to conduct this test.