Added test cases to KnapsackMemoizationTest

Author: Chiefpatwal

src/test/java/com/thealgorithms/dynamicprogramming/KnapsackMemoizationTest.java

@@ -31,4 +31,22 @@ void test3() {
         int capacity = 50;
         assertEquals(220, knapsackMemoization.knapSack(capacity, weight, value, weight.length));
     }
+
+    @Test
+    void test4() {
+        int[] weight = {1, 2, 3};
+        int[] value = {10, 20, 30};
+        int capacity = 0;
+
+        assertEquals(0, knapsackMemoization.knapSack(capacity, weight, value, weight.length));
+    }
+    @Test
+    void test5() {
+        int[] weight = {1, 2, 3, 8};
+        int[] value = {10, 20, 30, 40};
+        int capacity = 50;
+
+
+        assertEquals(100, knapsackMemoization.knapSack(capacity, weight, value, weight.length));
+    }
 }