Ensure axis are inverted after shared axis ranges are combined (#3083)

holoviews/plotting/bokeh/element.py

@@ -567,10 +567,10 @@ def _update_range(self, axis_range, low, high, factors, invert, shared, log, str
                     offset = abs(low*0.1 if low else 0.5)
                     low -= offset
                     high += offset
-            if invert: low, high = high, low
             if shared:
                 shared = (axis_range.start, axis_range.end)
                 low, high = util.max_range([(low, high), shared])
+            if invert: low, high = high, low
             if not isinstance(low, util.datetime_types) and log and (low is None or low <= 0):
                 low = 0.01 if high < 0.01 else 10**(np.log10(high)-2)
                 self.warning("Logarithmic axis range encountered value less than or equal to zero, "

holoviews/tests/plotting/bokeh/testlayoutplot.py

@@ -239,3 +239,11 @@ def test_layout_disable_toolbar(self):
         plot = bokeh_renderer.get_plot(layout)
         self.assertIsInstance(plot.state, Column)
         self.assertEqual(len(plot.state.children), 1)
+
+    def test_layout_shared_inverted_yaxis(self):
+        layout = (Curve([]) + Curve([])).options('Curve', invert_yaxis=True)
+        plot = bokeh_renderer.get_plot(layout)
+        subplot = list(plot.subplots.values())[0].subplots['main']
+        self.assertEqual(subplot.handles['y_range'].start, 1)
+        self.assertEqual(subplot.handles['y_range'].end, 0)
+