class_docstr: Test for measurement expansion
class_docstr_tok: ["Test","for","measurement","expansion"]
docstr: Check a MeasurementProcess without observable to report not having a decomposition
docstr_tok: ["Check","a","MeasurementProcess","without","observable","to","report","not","having","a","decomposition"]
code: def test_has_decomposition_false_no_observable(self):
      """Check a MeasurementProcess without observable to report not having a decomposition"""
      m = ProbabilityMP(wires=qml.wires.Wires([0, 1]))
      assert m.has_decomposition is False
  
      m = ExpectationMP(
          wires=qml.wires.Wires([0, 1]), eigvals=np.ones(4)
      )
      assert m.has_decomposition is False
  
imports: import numpy
  import pytest
  import pennylane
  from pennylane.measurements import ClassicalShadowMP, Counts, CountsMP, Expectation, ExpectationMP, MeasurementProcess, MeasurementTransform, MeasurementValue, MidMeasure, MidMeasureMP, MutualInfoMP, PurityMP, Probability, ProbabilityMP, Sample, SampleMeasurement, SampleMP, ShadowExpvalMP, Shots, State, StateMeasurement, StateMP, Variance, VarianceMP, VnEntropyMP, expval, sample, var
  from pennylane.operation import DecompositionUndefinedError
  from pennylane.queuing import AnnotatedQueue
  from pennylane.wires import Wires
label_desc: Use image node_id 7 for calling the TestExpansion obj's underlying member method code with example usage: obj.test_has_decomposition_false_no_observable() without return types