add test for 4070

Author: fishercoder1534

src/test/java/com/fishercoder/fifththousand/_4070Test.java

@@ -0,0 +1,21 @@
+package com.fishercoder.fifththousand;
+
+import com.fishercoder.solutions.fifththousand._4070;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class _4070Test {
+    private _4070.Solution1 solution1;
+
+    @BeforeEach
+    public void setup() {
+        solution1 = new _4070.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(12, solution1.minRotations("1200210200"));
+    }
+}