code: def test_imin():
      a = imin(interval(1, 3), interval(2, 5), interval(-1, 3))
      assert a.start == -1
      assert a.end == 3
  
      a = imin(-2, interval(1, 4))
      assert a.start == -2
      assert a.end == -2
  
      a = imin(5, interval(3, 4), interval(-2, 2, is_valid=False))
      assert a.start == 3
      assert a.end == 4
  
imports: from sympy.external import import_module
  from sympy.plotting.intervalmath import Abs, acos, acosh, And, asin, asinh, atan, atanh, ceil, cos, cosh, exp, floor, imax, imin, interval, log, log10, Or, sin, sinh, sqrt, tan, tanh
label_desc: Use image node_id 10 for calling a global function with example usage: test_imin() without return types