code: def test_DomainScalar_floordiv():
      A = DomainScalar(ZZ(-5), ZZ)
      B = DomainScalar(QQ(2), QQ)
      assert A // B == DomainScalar(QQ(-5, 2), QQ)
      C = DomainScalar(ZZ(2), ZZ)
      assert A // C == DomainScalar(ZZ(-3), ZZ)
  
      raises(TypeError, lambda: A // 1.5)
  
imports: from sympy.testing.pytest import raises
  from sympy.core.symbol import S
  from sympy.polys import ZZ, QQ
  from sympy.polys.matrices.domainscalar import DomainScalar
  from sympy.polys.matrices.domainmatrix import DomainMatrix
label_desc: Use image node_id 12 for calling a global function with example usage: test_DomainScalar_floordiv() without return types