TST: add test of LogLocator.subs input validation

tacaswell · tacaswell · commit 06507f272dbc · 2019-08-24T21:21:28.000-04:00
diff --git a/lib/matplotlib/tests/test_ticker.py b/lib/matplotlib/tests/test_ticker.py
@@ -1260,3 +1260,12 @@ def test_remove_overlap(remove_overlapping_locs, expected_num):
     assert len(ax.xaxis.get_minor_ticks()) == expected_num
     assert len(ax.xaxis.get_minorticklabels()) == expected_num
     assert len(ax.xaxis.get_minorticklines()) == expected_num*2
+
+
+@pytest.mark.parametrize('sub', [
+    ['hi', 'aardvark'],
+    np.zeros((2, 2))])
+def test_bad_locator_subs(sub):
+    ll = mticker.LogLocator()
+    with pytest.raises(ValueError):
+        ll.subs(sub)
