text: """
  rename this to test_assumptions.py when the old assumptions system is deleted
  """
  from sympy.abc import x, y
  from sympy.assumptions.assume import global_assumptions, Predicate
  from sympy.assumptions.ask import _extract_facts, Q
  from sympy.core import symbols
  from sympy.logic.boolalg import Or
  from sympy.printing import pretty
  from sympy.utilities.pytest import XFAIL
  
  
  def test_equal():
      """Test for equality"""
      assert Q.positive(x) == Q.positive(x)
      assert Q.positive(x) != ~Q.positive(x)
      assert ~Q.positive(x) == ~Q.positive(x)
  
  
  def test_pretty():
      assert pretty(Q.positive(x)) == "Q.positive(x)"
      assert pretty(
          set([Q.positive, Q.integer])) == "{Q.integer, Q.positive}"
  
  
  def test_extract_facts():
      a, b = symbols('a b', cls=Predicate)
      assert _extract_facts(a(x), x) == a
      assert _extract_facts(a(x), y) is None
      assert _extract_facts(~a(x), x) == ~a
      assert _extract_facts(~a(x), y) is None
      assert _extract_facts(a(x) | b(x), x) == a | b
      assert _extract_facts(a(x) | ~b(x), x) == a | ~b
      assert _extract_facts(a(x) & b(y), x) == a
      assert _extract_facts(a(x) & b(y), y) == b
      assert _extract_facts(a(x) | b(y), x) == None
      assert _extract_facts(~(a(x) | b(y)), x) == ~a
  
  
  def test_global():
      """Test for global assumptions"""
      global_assumptions.add(Q.is_true(x > 0))
      assert Q.is_true(x > 0) in global_assumptions
      global_assumptions.remove(Q.is_true(x > 0))
      assert not Q.is_true(x > 0) in global_assumptions
      # same with multiple of assumptions
      global_assumptions.add(Q.is_true(x > 0), Q.is_true(y > 0))
      assert Q.is_true(x > 0) in global_assumptions
      assert Q.is_true(y > 0) in global_assumptions
      global_assumptions.clear()
      assert not Q.is_true(x > 0) in global_assumptions
      assert not Q.is_true(y > 0) in global_assumptions
  