TST: re-add test

jklymak · jklymak · commit 6c1a79d27b3d · 2021-05-03T07:19:07.000-07:00
diff --git a/lib/matplotlib/tests/test_dates.py b/lib/matplotlib/tests/test_dates.py
@@ -11,6 +11,7 @@
 import matplotlib.pyplot as plt
 from matplotlib.testing.decorators import image_comparison
 import matplotlib.ticker as mticker
+import matplotlib._api as _api
 
 
 def test_date_numpyx():
@@ -1090,3 +1091,16 @@ def test_julian2num():
     mdates.set_epoch('1970-01-01T00:00:00')
     assert mdates.julian2num(2440588.5) == 1.0
     assert mdates.num2julian(2.0) == 2440589.5
+
+
+def test_epoch2num():
+    with _api.suppress_matplotlib_deprecation_warning():
+        mdates._reset_epoch_test_example()
+        mdates.set_epoch('0000-12-31')
+        assert mdates.epoch2num(86400) == 719164.0
+        assert mdates.num2epoch(719165.0) == 86400 * 2
+        # set back to the default
+        mdates._reset_epoch_test_example()
+        mdates.set_epoch('1970-01-01T00:00:00')
+        assert mdates.epoch2num(86400) == 1.0
+        assert mdates.num2epoch(2.0) == 86400 * 2
