Add Position class
Add row field to Position
Add spec for new Position's row
Pass last added spec
Add column value to Position class
Add spec for column value on a Position
Pass last added spec
Document Position class parameters
Add apply method to Position object
Add spec of row of Position created without new
Pass last added spec
Add spec for column of Position created without new
Pass last added spec
Add == to Position class
Add spec for Position self-equality
Pass last added spec
Add spec for Position equality with different rows
Pass last added spec
Add spec for position equality with different columns
Pass last added spec