[REFACTOR] [Hacker Rank] Interview Preparation Kit: Array: 2D Array - DS. Test cases added.

Author: Gonzalo Diaz

src/hackerrank/interview_preparation_kit/arrays/2d_array.testcases_test.json

@@ -10,5 +10,29 @@
       [0, 0, 1, 2, 4, 0]
     ],
     "expected": 19
+  },
+  {
+    "title": "Sample Test Case 1",
+    "input": [
+      [1, 1, 1, 0, 0, 0],
+      [0, 1, 0, 0, 0, 0],
+      [1, 1, 1, 0, 0, 0],
+      [0, 9, 2, -4, -4, 0],
+      [0, 0, 0, -2, 0, 0],
+      [0, 0, -1, -2, -4, 0]
+    ],
+    "expected": 13
+  },
+  {
+    "title": "Sample Test Case 2",
+    "input": [
+      [-9, -9, -9, 1, 1, 1],
+      [0, -9, 0, 4, 3, 2],
+      [-9, -9, -9, 1, 2, 3],
+      [0, 0, 8, 6, 6, 0],
+      [0, 0, 0, -2, 0, 0],
+      [0, 0, 1, 2, 4, 0]
+    ],
+    "expected": 28
   }
 ]