                             5, 6 ], 2 # expected result?
       expect(C).not.toBe B # not in place?
       expect(B).toEqual A # source unchanged ?
+
 
   describe 'mult() function', ->
 

      expect(A2).toEqual A # source unchanged ?
      expect(B2).toEqual B # source unchanged ?

  describe 'toString() function', ->

    it 'should return the matrix as string', ->
      expect(A.toString()).toBe '1 3 5\n2 4 6'

      expect(B).not.toBe A
      expect(B).toBe A2
      expect(B).toEqual A


  describe 'map() function', ->

