Update unittest to skip if not Bokeh 3.2

holoviews/plotting/bokeh/annotation.py

@@ -34,7 +34,7 @@ class _SyntheticAnnotationPlot(ElementPlot):
 
     def __init__(self, element, **kwargs):
         if not bokeh32:
-            name = type(element.last).__name__
+            name = type(getattr(element, "last", element)).__name__
             msg = f'{name} element requires Bokeh >=3.2'
             raise ImportError(msg)
         super().__init__(element, **kwargs)

holoviews/tests/plotting/bokeh/test_annotationplot.py

@@ -1,14 +1,19 @@
+import unittest
+
 import numpy as np
 
-from bokeh.models import VSpan as BkVSpan, HSpan as BkHSpan, VStrip as BkVStrip, HStrip as BkHStrip
 
 from holoviews.element import (
     HLine, VLine, Text, Labels, Arrow, HSpan, VSpan, Slope,
     HLines, VLines, HSpans, VSpans,
 )
+from holoviews.plotting.bokeh.util import bokeh32
 
 from .test_plot import TestBokehPlot, bokeh_renderer
 
+if bokeh32:
+    from bokeh.models import VSpan as BkVSpan, HSpan as BkHSpan, VStrip as BkVStrip, HStrip as BkHStrip
+
 
 class TestHVLinePlot(TestBokehPlot):
 
@@ -203,6 +208,10 @@ def test_labels_plot_rotation_style(self):
 
 class TestHVLinesPlot(TestBokehPlot):
 
+    def setUp(self):
+        raise unittest.SkipTest(not bokeh32, "Bokeh 3.2 added H/VLines")
+        super().setUp()
+
     def test_hlines_plot(self):
         hlines = HLines(
             {"y": [0, 1, 2, 5.5], "extra": [-1, -2, -3, -44]}, vdims=["extra"]
@@ -334,6 +343,10 @@ def test_vlines_hlines_overlay(self):
 
 class TestHVSpansPlot(TestBokehPlot):
 
+    def setUp(self):
+        raise unittest.SkipTest(not bokeh32, "Bokeh 3.2 added H/VSpans")
+        super().setUp()
+
     def test_hspans_plot(self):
         hspans = HSpans(
             {"y0": [0, 3, 5.5], "y1": [1, 4, 6.5], "extra": [-1, -2, -3]}, vdims=["extra"]