diff --git a/src/test/java/TestDates.java b/src/test/java/TestDates.java
new file mode 100644
index 0000000..9240fcc
--- /dev/null
+++ b/src/test/java/TestDates.java
@@ -0,0 +1,47 @@
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class TestDates {
+    static BonusExercises ex;
+
+    @BeforeAll
+    static void setUp() {
+        ex = new BonusExercises();
+    }
+
+    @Test
+    void testDates0() {
+        String input = "Today is 12/09/2023.";
+        String expected = "12/09/2023";
+        assertEquals(expected, ex.findDate(input));
+    }
+
+    @Test
+    void testDates1() {
+        String input = "Meeting: 2024-07-15 at noon.";
+        String expected = "2024-07-15";
+        assertEquals(expected, ex.findDate(input));
+    }
+
+    @Test
+    void testDates2() {
+        String input = "No date here.";
+        assertNull(ex.findDate(input));
+    }
+
+    @Test
+    void testDates3() {
+        String input = "Release date will be 2025/01/01 (hopefully) at midnight";
+        String expected = "2025/01/01";
+        assertEquals(expected, ex.findDate(input));
+    }
+
+    @Test
+    void testDates4() {
+        String input = "Meet me at 45/12/2023.";
+        assertNull(ex.findDate(input));
+    }
+}
diff --git a/src/test/java/TestEmail.java b/src/test/java/TestEmail.java
new file mode 100644
index 0000000..48cf1f7
--- /dev/null
+++ b/src/test/java/TestEmail.java
@@ -0,0 +1,39 @@
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class TestEmail {
+    static BonusExercises ex;
+
+    @BeforeAll
+    static void setUp() {
+        ex = new BonusExercises();
+    }
+
+    @Test
+    void testEmail0() {
+        assertTrue(ex.validateEmail("john.doe@example.com"));
+    }
+
+    @Test
+    void testEmail1() {
+        assertFalse(ex.validateEmail("hello world@example.com"));
+    }
+
+    @Test
+    void testEmail2() {
+        assertTrue(ex.validateEmail("alice_bob123@research-lab.co.uk"));
+    }
+
+    @Test
+    void testEmail3() {
+        assertFalse(ex.validateEmail("user@ex_ample.com"));
+    }
+
+    @Test
+    void testEmail4() {
+        assertFalse(ex.validateEmail("user.@-example.com"));
+    }
+}
diff --git a/src/test/java/TestPalindromes.java b/src/test/java/TestPalindromes.java
new file mode 100644
index 0000000..c9a26ee
--- /dev/null
+++ b/src/test/java/TestPalindromes.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 TestPalindromes {
+    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));
+    }
+}
diff --git a/src/test/java/TestPasswords.java b/src/test/java/TestPasswords.java
new file mode 100644
index 0000000..9c21dc6
--- /dev/null
+++ b/src/test/java/TestPasswords.java
@@ -0,0 +1,43 @@
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TestPasswords {
+    static BonusExercises ex;
+
+    @BeforeAll
+    static void setUp() {
+        ex = new BonusExercises();
+    }
+
+    @Test
+    void testPasswords0() {
+        assertEquals(1, ex.findValidPasswords("P@ssw0rd is my secret"));
+    }
+
+    @Test
+    void testPasswords1() {
+        assertEquals(3, ex.findValidPasswords("""
+                Alice's new password is SecureP@ss1 but Bob still uses weakpass123.\s
+                Charlie upgraded to Ultra_Strong99! while David set his to Admin123 (which is not secure).\s
+                Their boss? He went with SuperSafe#42 and banned "password123"."""));
+    }
+
+    @Test
+    void testPasswords2() {
+        assertEquals(4, ex.findValidPasswords("""
+                [09:15] Dev1: Just changed my password to CodeMaster@2025. \s
+                [09:17] Dev2: Haha, mine's still qwerty123, no special chars. \s
+                [09:19] Dev3: I use GitHubSuper#1 but need a better one. \s
+                [09:21] Dev4: AdminPass42! is good, right? \s
+                [09:23] Dev5: No, too simple. I switched to UltraSecure$99 last week. \s
+                [09:25] Dev6: Wait, are we sharing passwords here? \uD83D\uDE02 \s
+                """));
+    }
+
+    @Test
+    void testPasswords3() {
+        assertEquals(0, ex.findValidPasswords("NoSpecial1 WeakPass! NoDigits@"));
+    }
+}