code: def test_arrayToLineSegments():
      # test the boundary case where the dataset consists of a single point
      xy = np.array([0.0])
      parray = arrayToLineSegments(
          xy, xy, connect="all", finiteCheck=True
      )
      segs = parray.drawargs()
      assert isinstance(segs, tuple) and len(segs) in [1, 2]
      if len(segs) == 1:
          assert len(segs[0]) == 0
      elif len(segs) == 2:
          assert segs[1] == 0
  
imports: import numpy
  import pyqtgraph
  from pyqtgraph.graphicsItems.PlotCurveItem import arrayToLineSegments
  from tests.image_testing import assertImageApproved
label_desc: Use image node_id 2 for calling a global function with example usage: test_arrayToLineSegments() without return types