Add test for _num_to_string method used in __call__ of LogFormatter (#8598)

patniharshit · phobson · commit 7d6b0c850180 · 2017-05-10T11:44:54.000-07:00
Closes #8597
diff --git a/lib/matplotlib/tests/test_ticker.py b/lib/matplotlib/tests/test_ticker.py
@@ -521,6 +521,13 @@ def test_sublabel(self):
         ax.set_xlim(0.5, 0.9)
         self._sub_labels(ax.xaxis, subs=np.arange(2, 10, dtype=int))
 
+    @pytest.mark.parametrize('val', [1, 10, 100, 1000])
+    def test_LogFormatter_call(self, val):
+        # test _num_to_string method used in __call__
+        temp_lf = mticker.LogFormatter()
+        temp_lf.axis = FakeAxis()
+        assert temp_lf(val) == str(val)
+
 
 class TestFormatStrFormatter(object):
     def test_basic(self):
