#NEWLINE# def test_get_joint_parameters( self , river_graph ) : #NEWLINE# #INDENT# ( mu , sigma ) = river_graph . get_joint_parameters ( ) #NEWLINE# assert ( mu == MeansVector ( [ [ 3 ] , [ 4 ] , [ 9 ] , [ 14 ] ] , names = [ 'a' , 'b' , 'c' , 'd' ] ) ) #NEWLINE# assert ( sigma == CovarianceMatrix ( [ [ 4 , 4 , 8 , 12 ] , [ 4 , 5 , 8 , 13 ] , [ 8 , 8 , 20 , 28 ] , [ 12 , 13 , 28 , 42 ] ] , names = [ 'a' , 'b' , 'c' , 'd' ] ) )