add test for 4

Author: fishercoder1534

src/test/java/com/fishercoder/_4Test.java

@@ -0,0 +1,37 @@
+package com.fishercoder;
+
+import com.fishercoder.solutions._4;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class _4Test {
+    private static _4.Solution1 solution1;
+    private static _4.Solution2 solution2;
+    private static int[] A;
+    private static int[] B;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _4.Solution1();
+        solution2 = new _4.Solution2();
+    }
+
+    @Test
+    public void test1() {
+        A = new int[]{1, 3};
+        B = new int[]{2};
+        assertEquals(2.0, solution1.findMedianSortedArrays(A, B), 0.0);
+        assertEquals(2.0, solution2.findMedianSortedArrays(A, B), 0.0);
+    }
+
+    @Test
+    public void test2() {
+        A = new int[]{1, 2};
+        B = new int[]{3, 4};
+        assertEquals(2.5, solution1.findMedianSortedArrays(A, B), 0.0);
+        assertEquals(2.5, solution2.findMedianSortedArrays(A, B), 0.0);
+    }
+
+}