class_docstr: Test the Snapshot instruction for simulators.
class_docstr_tok: ["Test","the","Snapshot","instruction","for","simulators","."]
docstr: Test that snapshots function in the absence of any Snapshot operations.
docstr_tok: ["Test","that","snapshots","function","in","the","absence","of","any","Snapshot","operations","."]
code: def test_empty_snapshots(self):
      """Test that snapshots function in the absence of any Snapshot operations."""
      dev = qml.device("default.qubit", wires=2)
  
      @qml.qnode(dev)
      def circuit():
          qml.Hadamard(wires=0)
          qml.CNOT(wires=[0, 1])
          return qml.expval(qml.PauliX(0))
  
      result = qml.snapshots(circuit)()
      expected = {"execution_results": np.array(0)}
  
      assert result == expected
  
file_path: pennylane/tests/test_debugging.py
imports: import pytest
  import numpy
  import pennylane
label_desc: Use image node_id 8 for calling the TestSnapshot obj's underlying member method code with example usage: obj.test_empty_snapshots() and returns: qml