TST: add test

jklymak · jklymak · commit 549e0e7f550b · 2021-05-28T16:34:00.000-07:00
diff --git a/lib/matplotlib/colorbar.py b/lib/matplotlib/colorbar.py
@@ -900,8 +900,7 @@ def set_alpha(self, alpha):
 
     def remove(self):
         """Remove this colorbar from the figure."""
-        self.ax.inner_ax.remove()
-        self.ax.outer_ax.remove()
+        self.ax.remove()
 
     def _ticker(self, locator, formatter):
         """
diff --git a/lib/matplotlib/tests/test_colorbar.py b/lib/matplotlib/tests/test_colorbar.py
@@ -759,6 +759,24 @@ def test_axes_handles_same_functions(fig_ref, fig_test):
         caxx.set_position([0.92, 0.1, 0.02, 0.7])
 
 
+@check_figures_equal(extensions=["png"])
+def test_colorbar_reuse_axes(fig_ref, fig_test):
+    ax = fig_ref.add_subplot()
+    pc = ax.imshow(np.arange(100).reshape(10, 10))
+    cb = fig_ref.colorbar(pc)
+    cb2 = fig_ref.colorbar(pc, extend='both')
+
+    ax = fig_test.add_subplot()
+    pc = ax.imshow(np.arange(100).reshape(10, 10))
+    cb = fig_test.colorbar(pc, extend='both')
+    cb2 = fig_test.colorbar(pc)
+    # Clear and re-use the same colorbar axes
+    cb.ax.cla()
+    cb2.ax.cla()
+    cb = fig_test.colorbar(pc, cax=cb.ax)
+    cb2 = fig_test.colorbar(pc, cax=cb2.ax, extend='both')
+
+
 def test_inset_colorbar_layout():
     fig, ax = plt.subplots(constrained_layout=True, figsize=(3, 6))
     pc = ax.imshow(np.arange(100).reshape(10, 10))
