class_docstr: Unit tests for the ``rect`` function.
class_docstr_tok: ["Unit","tests","for","the","``","rect","``","function","."]
docstr: Test that the ``rect`` function raises a ValueError for ill-formatted windows.
docstr_tok: ["Test","that","the","``","rect","``","function","raises","a","ValueError","for","ill-formatted","windows","."]
code: def test_rect_raises_invalid_windows(self, windows):
      """Test that the ``rect`` function raises a ValueError for ill-formatted windows."""
      with pytest.raises(
          ValueError, match="At least one provided window"
      ):
          _ = qml.pulse.rect(x=10, windows=windows)
  
imports: import inspect
  from functools import reduce
  import numpy
  import pytest
  import pennylane
  from pennylane.pulse import ParametrizedHamiltonian
label_desc: Use image node_id 3 for calling the TestRect obj's underlying member method code with example usage: obj.test_rect_raises_invalid_windows(windows) without return types