add test

Author: rcomer

lib/matplotlib/tests/test_collections.py

@@ -611,6 +611,12 @@ def test_lslw_bcast():
     assert (col.get_linewidths() == [1, 2, 3]).all()
 
 
+def test_set_wrong_linestyle():
+    c = Collection()
+    with pytest.raises(ValueError, match="Do not know how to convert 'fuzzy'"):
+        c.set_linestyle('fuzzy')
+
+
 @mpl.style.context('default')
 def test_capstyle():
     col = mcollections.PathCollection([], capstyle='round')