code: def test_solve():
      A = Matrix([[1, 2], [2, 4]])
      b = Matrix([[3], [4]])
      raises(ValueError, lambda: A.solve(b))  # no solution
      b = Matrix([[4], [8]])
      raises(ValueError, lambda: A.solve(b))
  
imports: import pytest
  from sympy.core.function import expand_mul
  from sympy.core.numbers import I, Rational
  from sympy.core.singleton import S
  from sympy.core.symbol import Symbol, symbols
  from sympy.core.sympify import sympify
  from sympy.simplify.simplify import simplify
  from sympy.matrices.exceptions import ShapeError, NonSquareMatrixError
  from sympy.matrices import ImmutableMatrix, Matrix, eye, ones, ImmutableDenseMatrix, dotprodsimp
  from sympy.matrices.determinant import _det_laplace
  from sympy.testing.pytest import raises
  from sympy.matrices.exceptions import NonInvertibleMatrixError
  from sympy.polys.matrices.exceptions import DMShapeError
  from sympy.solvers.solveset import linsolve
  from sympy.abc import x, y
label_desc: Use image node_id 19 for calling a global function with example usage: test_solve() without return types