code: def test_dynamicsymbols():
      # Tests to check the assumptions applied to dynamicsymbols
      f1 = dynamicsymbols("f1")
      f2 = dynamicsymbols("f2", real=True)
      f3 = dynamicsymbols("f3", positive=True)
      f4, f5 = dynamicsymbols("f4,f5", commutative=False)
      f6 = dynamicsymbols("f6", integer=True)
      assert f1.is_real is None
      assert f2.is_real
      assert f3.is_positive
      assert f4 * f5 != f5 * f4
      assert f6.is_integer
  
imports: from sympy.core.numbers import pi
  from sympy.core.singleton import S
  from sympy.core.symbol import symbols
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.functions.elementary.trigonometric import cos, sin
  from sympy.integrals.integrals import Integral
  from sympy.physics.vector import Dyadic, Point, ReferenceFrame, Vector
  from sympy.physics.vector.functions import cross, dot, express, time_derivative, kinematic_equations, outer, partial_velocity, get_motion_params, dynamicsymbols
  from sympy.simplify import trigsimp
  from sympy.testing.pytest import raises
label_desc: Use image node_id 11 for calling a global function with example usage: test_dynamicsymbols() without return types