docstr: Test that logical conjunction works.
docstr_tok: ["Test","that","logical","conjunction","works","."]
code: def test_and(self):
      """Test that logical conjunction works."""
      crit_0 = qml.BooleanFn(lambda x: x > 4)
      crit_1 = qml.BooleanFn(lambda x: x < 9)
      crit = crit_0 & crit_1
      assert not crit(-2)
      assert crit(6)
      assert not crit(10)
  
imports: import pytest
  import pennylane
label_desc: Use image node_id 3 for calling the TestBooleanFn obj's underlying member method code with example usage: obj.test_and() without return types