matplotlib
diff --git a/‎lib/matplotlib/tests/baseline_images/test_dates/date_empty.png
-13.4 KB b/‎lib/matplotlib/tests/baseline_images/test_dates/date_empty.png
-13.4 KB
diff --git a/‎lib/matplotlib/tests/test_dates.py
Lines changed: 19 additions & 0 deletions b/‎lib/matplotlib/tests/test_dates.py
Lines changed: 19 additions & 0 deletions
@@ -91,6 +91,25 @@ def test_date_empty():
     mdates._reset_epoch_test_example()
 
 
+def test_axhline():
+    # make sure that axhline doesn't set the xlimits...
+    fig, ax = plt.subplots()
+    ax.axhline(1.5)
+    ax.plot([np.datetime64('2016-01-01'), np.datetime64('2016-01-02')], [1, 2])
+    np.testing.assert_allclose(ax.get_xlim(),
+                               [mdates.date2num(np.datetime64('2016-01-01')),
+                                mdates.date2num(np.datetime64('2016-01-02'))])
+
+    mdates._reset_epoch_test_example()
+    mdates.set_epoch('0000-12-31')
+    fig, ax = plt.subplots()
+    ax.axhline(1.5)
+    ax.plot([np.datetime64('2016-01-01'), np.datetime64('2016-01-02')], [1, 2])
+    np.testing.assert_allclose(ax.get_xlim(),
+                               [mdates.date2num(np.datetime64('2016-01-01')),
+                                mdates.date2num(np.datetime64('2016-01-02'))])
+    mdates._reset_epoch_test_example()
+
 
 @image_comparison(['date_axhspan.png'])
 def test_date_axhspan():