Separate test

leolchat · leolchat · commit 986a0f9192f4 · 2020-04-29T22:08:09.000-07:00
diff --git a/lib/matplotlib/dates.py b/lib/matplotlib/dates.py
@@ -777,7 +777,7 @@ def format_ticks(self, values):
                 break
             elif level == 0:
                 # all tickdate are the same, so only micros might be different
-                # set to the most precise available (level=6: microseconds doesn't exist...)
+                # set to the most precise (6: microseconds doesn't exist...)
                 level = 5
 
         # level is the basic level we will label at.
diff --git a/lib/matplotlib/tests/test_dates.py b/lib/matplotlib/tests/test_dates.py
@@ -449,6 +449,14 @@ def _create_auto_date_locator(date1, date2):
         assert list(map(str, mdates.num2date(locator()))) == expected
 
 
+def test_concise_formatter_subsecond():
+    locator = mdates.AutoDateLocator(interval_multiples=True)
+    formatter = mdates.ConciseDateFormatter(locator)
+    year_1996 = 9861.0
+    strings = formatter.format_ticks([year_1996, year_1996 + 500 / mdates.MUSECONDS_PER_DAY, year_1996 + 900 / mdates.MUSECONDS_PER_DAY])
+    assert strings == ['00:00', '00.0005', '00.0009']
+
+
 def test_concise_formatter():
     def _create_auto_date_locator(date1, date2):
         fig, ax = plt.subplots()
