integrate expect as assert alternative

Signed-off-by: Torsten Hein <hein@webworx.de>
toBe

Signed-off-by: Torsten Hein <hein@webworx.de>
toBeNull, notToBeNull

Signed-off-by: Torsten Hein <hein@webworx.de>
toEqual

Signed-off-by: Torsten Hein <hein@webworx.de>