saddle-points: Update the tests following the canonical data (#1048)

* saddle-points: Update the tests following the canonical data

Author: elyssonmr

exercises/saddle-points/saddle_points_test.py

@@ -10,21 +10,31 @@
 from saddle_points import saddle_points
 
 
+# Tests adapted from `problem-specifications//canonical-data.json` @ v1.0.0
+
 class SaddlePointTest(unittest.TestCase):
     def test_one_saddle(self):
         inp = [[9, 8, 7], [5, 3, 2], [6, 6, 7]]
         self.assertEqual(saddle_points(inp), set([(1, 0)]))
 
+    def test_empty_matrix(self):
+        self.assertEqual(saddle_points([]), set())
+
     def test_no_saddle(self):
-        self.assertEqual(saddle_points([[2, 1], [1, 2]]), set())
+        inp = [[1, 2, 3], [3, 1, 2], [2, 3, 1]]
+        self.assertEqual(saddle_points(inp), set())
 
     def test_mult_saddle(self):
-        inp = [[5, 3, 5, 4], [6, 4, 7, 3], [5, 1, 5, 3]]
-        ans = set([(0, 0), (0, 2), (2, 0), (2, 2)])
+        inp = [[4, 5, 4], [3, 5, 5], [1, 5, 4]]
+        ans = set([(0, 1), (1, 1), (2, 1)])
         self.assertEqual(saddle_points(inp), ans)
 
-    def test_empty_matrix(self):
-        self.assertEqual(saddle_points([]), set())
+    def test_indentify_saddle_bottom_right_corner(self):
+        inp = [[8, 7, 9], [6, 7, 6], [3, 2, 5]]
+        ans = set([(2, 2)])
+        self.assertEqual(saddle_points(inp), ans)
+
+    # Additional tests for this track
 
     def test_irregular_matrix(self):
         inp = [[3, 2, 1], [0, 1], [2, 1, 0]]