code: def test_norm(n=1):
      # Maximum "n" which is tested:
      for i in range(n + 1):
          assert integrate(psi_n(i, x, 1, 1) ** 2, (x, -oo, oo)) == 1
  
file_path: sympy/sympy/physics/tests/test_qho_1d.py
imports: from sympy.core.numbers import Rational, oo, pi
  from sympy.core.singleton import S
  from sympy.core.symbol import Symbol
  from sympy.functions.elementary.exponential import exp
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.integrals.integrals import integrate
  from sympy.simplify.simplify import simplify
  from sympy.abc import omega, m, x
  from sympy.physics.qho_1d import psi_n, E_n, coherent_state
  from sympy.physics.quantum.constants import hbar
label_desc: Use image node_id 2 for calling a global function with example usage: test_norm(n) without return types