add tests for 3208

Author: fishercoder1534

src/test/java/com/fishercoder/fourththousand/_3208Test.java

@@ -0,0 +1,37 @@
+package com.fishercoder.fourththousand;
+
+import com.fishercoder.solutions.fourththousand._3208;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class _3208Test {
+    private static _3208.Solution1 solution1;
+
+    @BeforeEach
+    public void setup() {
+        solution1 = new _3208.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertEquals(3, solution1.numberOfAlternatingGroups(new int[]{0, 1, 0, 1, 0}, 3));
+    }
+
+    @Test
+    public void test2() {
+        assertEquals(2, solution1.numberOfAlternatingGroups(new int[]{0, 1, 0, 0, 1, 0, 1}, 6));
+    }
+
+    @Test
+    public void test3() {
+        assertEquals(0, solution1.numberOfAlternatingGroups(new int[]{1, 1, 0, 1}, 4));
+    }
+
+    @Test
+    public void test4() {
+        assertEquals(4, solution1.numberOfAlternatingGroups(new int[]{0, 1, 0, 1}, 3));
+    }
+
+}