Refactoring (again) of stream asserter.
Refactoring (again) of stream asserter.

mageekguy/atoum,agallou/atoum,jubianchi/atoum,mageekguy/atoum,mikaelrandy/atoum,CedCannes/atoum,gpaton/atoum,mikaelrandy/atoum,agallou/atoum,Tiross/atoum,vonglasow/atoum,gpaton/atoum,jubianchi/atoum,tejerka/atoum,tejerka/atoum,GuillaumeDievart/atoum,CedCannes/atoum,Tiross/atoum,GuillaumeDievart/atoum,vonglasow/atoum