code: def test_dup_mignotte_sep_bound_squared():
      raises(
          PolynomialError,
          lambda: dup_mignotte_sep_bound_squared([], QQ),
      )
      raises(
          PolynomialError,
          lambda: dup_mignotte_sep_bound_squared([QQ(1)], QQ),
      )
  
      assert dup_mignotte_sep_bound_squared(
          [QQ(1), QQ(0), QQ(-2)], QQ
      ) == QQ(3, 5)
  
imports: from sympy.polys.rings import ring
  from sympy.polys.domains import ZZ, QQ, ZZ_I, EX
  from sympy.polys.polyerrors import DomainError, RefinementFailed, PolynomialError
  from sympy.polys.rootisolation import dup_cauchy_upper_bound, dup_cauchy_lower_bound, dup_mignotte_sep_bound_squared
  from sympy.testing.pytest import raises
label_desc: Use image node_id 4 for calling a global function with example usage: test_dup_mignotte_sep_bound_squared() without return types