class_docstr: Tests that the Barrier gate is correct.
class_docstr_tok: ["Tests","that","the","Barrier","gate","is","correct","."]
docstr: Test that if `only_visual=True`, the operation simplifies to a product of identities.
docstr_tok: ["Test","that","if","`","only_visual=True","`",",","the","operation","simplifies","to","a","product","of","identities","."]
code: def test_simplify_only_visual_multiple_wires(self):
      """Test that if `only_visual=True`, the operation simplifies to a product of identities."""
      op = qml.Barrier(wires=(0, 1, 2), only_visual=True)
      simplified = op.simplify()
      assert isinstance(simplified, qml.ops.op_math.Prod)
      for i, op in enumerate(simplified.operands):
          assert qml.equal(op, qml.Identity(i))
  
imports: import pytest
  import numpy
  from pennylane import Snapshot
  import pennylane
label_desc: Use image node_id 8 for calling the TestBarrier obj's underlying member method code with example usage: obj.test_simplify_only_visual_multiple_wires() without return types