Added new test for heatmap (#2904)

* Added new test for heatmap annotation

* Fixed typo in test_matrix.py

* changed deprecated method

tests/test_matrix.py

@@ -264,7 +264,7 @@ def test_cmap_with_properties(self):
         hm = mat._HeatMapper(self.df_unif, **kws)
         npt.assert_array_equal(cmap(np.inf), hm.cmap(np.inf))
 
-    def test_tickabels_off(self):
+    def test_ticklabels_off(self):
         kws = self.default_kws.copy()
         kws['xticklabels'] = False
         kws['yticklabels'] = False
@@ -346,6 +346,12 @@ def test_heatmap_annotation_other_data(self):
             assert text.get_text() == f"{val:.1f}"
             assert text.get_fontsize() == 14
 
+    def test_heatmap_annotation_different_shapes(self):
+
+        annot_data = self.df_norm.iloc[:-1]
+        with pytest.raises(ValueError):
+            mat.heatmap(self.df_norm, annot=annot_data)
+
     def test_heatmap_annotation_with_limited_ticklabels(self):
         ax = mat.heatmap(self.df_norm, fmt=".2f", annot=True,
                          xticklabels=False, yticklabels=False)