Add test for negative corner case

Lewn · web-flow · commit f6e242ff8076 · 2018-09-06T17:46:23.000+02:00
diff --git a/lib/matplotlib/tests/test_ticker.py b/lib/matplotlib/tests/test_ticker.py
@@ -655,6 +655,7 @@ class TestEngFormatter(object):
         (1.23456789, ('1.23457', '1', '1.23')),
         (999.9, ('999.9', '1 k', '999.90')),  # places=0: corner-case rounding
         (999.9999, ('1 k', '1 k', '1.00 k')),  # corner-case roudning for all
+        (-999.9999, ('-1 k', '-1 k', '-1.00 k')),  # negative corner-case
         (1000, ('1 k', '1 k', '1.00 k')),
         (1001, ('1.001 k', '1 k', '1.00 k')),
         (100001, ('100.001 k', '100 k', '100.00 k')),
