Remove Apache Commons IO dependency and split into smaller methods (#942)

* Fix the requested changes

* Split into smaller methods

* Split into smaller methods

* Remove apache dependency and split into smaller methods

* Add unit tests

jsoup/src/test/java/com/baeldung/jsoup/JsoupParserTest.java

@@ -0,0 +1,36 @@
+package com.baeldung.jsoup;
+
+import java.io.IOException;
+import org.jsoup.HttpStatusException;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import org.junit.Before;
+import org.junit.Test;
+
+public class JsoupParserTest {
+
+    JsoupParser jsoupParser;
+
+    @Before
+    public void setUp() {
+        jsoupParser = new JsoupParser();
+    }
+
+    @Test
+    public void test404() throws IOException {
+        try {
+            jsoupParser.loadDocument("https://spring.io/will-not-be-found");
+        } catch (HttpStatusException ex) {
+            assertEquals(404, ex.getStatusCode());
+        }
+    }
+
+    @Test
+    public void testChange() throws IOException {
+        jsoupParser.loadDocument("http://spring.io/blog");
+
+        jsoupParser.examplesModifying();
+
+        assertTrue(jsoupParser.getTidyHtml().contains("http://baeldung.com"));
+    }
+}