#NEWLINE# def test_abs2( ) : #NEWLINE# #INDENT# a = Symbol ( 'a' , real = False ) #NEWLINE# b = Symbol ( 'b' , real = False ) #NEWLINE# assert ( abs ( a ) != a ) #NEWLINE# assert ( abs ( ( - a ) ) != a ) #NEWLINE# assert ( abs ( ( a + ( I * b ) ) ) != sqrt ( ( ( b ** 2 ) + ( b ** 2 ) ) ) )