fix: placement and tests

src/test/java/BonusTestPalindromes.java

@@ -0,0 +1,73 @@
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class BonusTestPalindromes {
+    static BonusExercises ex;
+
+    @BeforeAll
+    static void setUp() {
+        ex = new BonusExercises();
+    }
+
+    @Test
+    void testPalindrome0() {
+        String input = "madam racecar level";
+
+        // palindrome words
+        List<String> expected = new ArrayList<>();
+        expected.add("madam");
+        expected.add("racecar");
+        expected.add("level");
+
+        assertEquals(expected, ex.findPalindromes(input));
+    }
+
+    @Test
+    void testPalindrome1() {
+        String input = "hello world";
+
+        // palindrome words
+        List<String> expected = new ArrayList<>();
+
+        assertEquals(expected, ex.findPalindromes(input));
+    }
+
+    @Test
+    void testPalindrome2() {
+        String input = "Step on no pets";
+
+        // palindrome words
+        List<String> expected = new ArrayList<>();
+
+        assertEquals(expected, ex.findPalindromes(input));
+    }
+
+    @Test
+    void testPalindrome3() {
+        String input = """
+                Madam, did you see Bob running? I asked Kayak and radar to wait at the civic center.\s
+                The level of security was high, but I noticed a racecar driving past. A deed was done in the noon,\s
+                and many said it was a referable situation.
+                """;
+
+        // palindrome words
+        List<String> expected = new ArrayList<>();
+        expected.add("Madam");
+        expected.add("did");
+        expected.add("Bob");
+        expected.add("Kayak");
+        expected.add("radar");
+        expected.add("civic");
+        expected.add("level");
+        expected.add("racecar");
+        expected.add("deed");
+        expected.add("noon");
+
+        assertEquals(expected, ex.findPalindromes(input));
+    }
+}