code: def test_SDM_eye():
      A = SDM.eye((2, 2), ZZ)
      assert A.domain == ZZ
      assert A.shape == (2, 2)
      assert dict(A) == {0: {0: ZZ(1)}, 1: {1: ZZ(1)}}
  
imports: from itertools import product
  from sympy.core.singleton import S
  from sympy.external.gmpy import GROUND_TYPES
  from sympy.testing.pytest import raises
  from sympy.polys.domains import QQ, ZZ, EXRAW
  from sympy.polys.matrices.sdm import SDM
  from sympy.polys.matrices.ddm import DDM
  from sympy.polys.matrices.exceptions import DMBadInputError, DMDomainError, DMShapeError
label_desc: Use image node_id 18 for calling a global function with example usage: test_SDM_eye() without return types