TST: make sure edge minor ticks are drawn

jklymak · jklymak · commit fbfa18ed3c7f · 2018-09-12T14:42:34.000-07:00
diff --git a/lib/matplotlib/colorbar.py b/lib/matplotlib/colorbar.py
@@ -267,7 +267,7 @@ def __call__(self):
         vmin = self._colorbar.norm.vmin
         vmax = self._colorbar.norm.vmax
         ticks = ticker.AutoMinorLocator.__call__(self)
-        rtol = (vmax - vmin) * 1e-10 
+        rtol = (vmax - vmin) * 1e-10
         return ticks[(ticks >= vmin - rtol) & (ticks <= vmax + rtol)]
 
 
diff --git a/lib/matplotlib/tests/test_colorbar.py b/lib/matplotlib/tests/test_colorbar.py
@@ -294,6 +294,15 @@ def test_colorbar_minorticks_on_off():
         np.testing.assert_almost_equal(cbar.ax.yaxis.get_minorticklocs(),
                                        np.array([]))
 
+        im.set_clim(vmin=-1.2, vmax=1.2)
+        cbar.minorticks_on()
+        correct_minorticklocs = np.array([-1.2, -1.1, -0.9, -0.8, -0.7, -0.6,
+                                          -0.4, -0.3, -0.2, -0.1,  0.1, 0.2,
+                                           0.3,  0.4,  0.6,  0.7,  0.8,  0.9,
+                                           1.1,  1.2])
+        np.testing.assert_almost_equal(cbar.ax.yaxis.get_minorticklocs(),
+                                       correct_minorticklocs)
+
 
 def test_colorbar_autoticks():
     # Test new autotick modes. Needs to be classic because
