diff --git a/core-java-modules/core-java-string-operations-5/src/test/java/com/baeldung/splitstring/SplitStringUnitTest.java b/core-java-modules/core-java-string-operations-5/src/test/java/com/baeldung/splitstring/SplitStringUnitTest.java
new file mode 100644
index 0000000000..5be8a1dacd
--- /dev/null
+++ b/core-java-modules/core-java-string-operations-5/src/test/java/com/baeldung/splitstring/SplitStringUnitTest.java
@@ -0,0 +1,104 @@
+package com.baeldung.splitstring;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import java.util.StringTokenizer;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.Test;
+
+public class SplitStringUnitTest {
+    private static final String SPACE = " ";
+    private static final String TAB = "	";
+    private static final String NEW_LINE = "\n";
+
+    private static final String FRUITS_TAB_SEPARATED = "Apple" + TAB + "Banana" + TAB + "Mango" + TAB + "Orange";
+    private static final String FRUITS_SPACE_SEPARATED = "Apple" + SPACE + "Banana" + SPACE + "Mango" + SPACE + "Orange";
+    private static final String FRUITS_NEWLINE_SEPARATED = "Apple" + NEW_LINE + "Banana" + NEW_LINE + "Mango" + NEW_LINE + "Orange";
+
+    @Test
+    public void givenSpaceSeparatedString_whenSplitUsingSpace_shouldGetExpectedResult() {
+        String fruits = FRUITS_SPACE_SEPARATED;
+        String[] fruitArray = fruits.split(SPACE);
+        verifySplit(fruitArray);
+    }
+
+    @Test
+    public void givenTabSeparatedString_whenSplitUsingTab_shouldGetExpectedResult() {
+        String fruits = FRUITS_TAB_SEPARATED;
+        String[] fruitArray = fruits.split(TAB);
+        verifySplit(fruitArray);
+    }
+
+    @Test
+    public void givenNewlineSeparatedString_whenSplitUsingNewline_shouldGetExpectedResult() {
+        String fruits = FRUITS_NEWLINE_SEPARATED;
+        String[] fruitArray = fruits.split(NEW_LINE);
+        verifySplit(fruitArray);
+    }
+
+    @Test
+    public void givenTabSeparatedString_whenSplitUsingSpace_shouldNowSplit() {
+        String fruits = FRUITS_TAB_SEPARATED;
+        String[] fruitArray = fruits.split(" ");
+        assertEquals(1, fruitArray.length);
+        assertEquals(fruits, fruitArray[0]);
+    }
+
+    @Test
+    public void givenWhiteSpaceSeparatedString_whenSplitUsingWhiteSpaceRegex_shouldGetExpectedResult() {
+        String whitespaceRegex = SPACE + "|" + TAB + "|" + NEW_LINE;
+        String[] allSamples = new String[] { FRUITS_SPACE_SEPARATED, FRUITS_TAB_SEPARATED, FRUITS_NEWLINE_SEPARATED };
+        for (String fruits : allSamples) {
+            String[] fruitArray = fruits.split(whitespaceRegex);
+            verifySplit(fruitArray);
+        }
+    }
+
+    @Test
+    public void givenNewlineSeparatedString_whenSplitUsingWhiteSpaceMetaChar_shouldGetExpectedResult() {
+        String whitespaceMetaChar = "\\s";
+        String[] allSamples = new String[] { FRUITS_SPACE_SEPARATED, FRUITS_TAB_SEPARATED, FRUITS_NEWLINE_SEPARATED };
+        for (String fruits : allSamples) {
+            String[] fruitArray = fruits.split(whitespaceMetaChar);
+            verifySplit(fruitArray);
+        }
+    }
+
+    @Test
+    public void givenSpaceSeparatedString_whenSplitUsingStringTokenizer_shouldGetExpectedResult() {
+        String fruits = FRUITS_SPACE_SEPARATED;
+        StringTokenizer tokenizer = new StringTokenizer(fruits);
+        String[] fruitArray = new String[tokenizer.countTokens()];
+        int index = 0;
+        while (tokenizer.hasMoreTokens()) {
+            fruitArray[index++] = tokenizer.nextToken();
+        }
+        verifySplit(fruitArray);
+    }
+
+    @Test
+    public void givenWhiteSpaceSeparatedString_whenSplitUsingStringUtils_shouldGetExpectedResult() {
+        String[] allSamples = new String[] { FRUITS_SPACE_SEPARATED, FRUITS_TAB_SEPARATED, FRUITS_NEWLINE_SEPARATED };
+        for (String fruits : allSamples) {
+            String[] fruitArray = StringUtils.split(fruits);
+            verifySplit(fruitArray);
+        }
+    }
+
+    @Test
+    public void givenNullString_whenSplitUsingStringUtils_shouldReturnNull() {
+        String fruits = null;
+        String[] fruitArray = StringUtils.split(fruits);
+        assertNull(fruitArray);
+    }
+
+    private void verifySplit(String[] fruitArray) {
+        assertEquals(4, fruitArray.length);
+        assertEquals("Apple", fruitArray[0]);
+        assertEquals("Banana", fruitArray[1]);
+        assertEquals("Mango", fruitArray[2]);
+        assertEquals("Orange", fruitArray[3]);
+    }
+}