add test for 256

Author: fishercoder1534

src/test/java/com/fishercoder/_256Test.java

@@ -0,0 +1,24 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions.first_thousand._256;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class _256Test {
+    private static _256.Solution1 solution1;
+
+    @BeforeEach
+    public void setup() {
+        solution1 = new _256.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(10, solution1.minCost(new int[][]{
+                {17, 2, 17}, {16, 16, 5}, {14, 3, 19}
+        }));
+    }
+
+}