Reverting NewlineText singleton (Sonar, no like).

Testing parent null (which will never occur in reality)

Author: Björn Ekryd

sorter/src/main/java/sortpom/content/NewlineText.java

@@ -7,11 +7,8 @@
  * in XmlProcessor.PatchedXMLWriter
  */
 public class NewlineText extends AbstractText {
-  public static final NewlineText INSTANCE = new NewlineText();
   private static final long serialVersionUID = -7552189498553321263L;
 
-  private NewlineText() {}
-
   /**
    * This returns a <code>String</code> representation of the <code>NewlineText</code>, suitable for
    * debugging.

sorter/src/main/java/sortpom/wrapper/TextWrapperCreator.java

@@ -36,7 +36,7 @@ Wrapper<Node> createWrapper(Text text) {
     return new UnsortedWrapper<>(text);
   }
 
-  private boolean isElementSpacePreserved(Element element) {
+  boolean isElementSpacePreserved(Element element) {
     if (element == null) {
       return false;
     }

sorter/src/main/java/sortpom/wrapper/content/UnsortedWrapper.java

@@ -7,7 +7,7 @@
 /** A wrapper that lets is element be unsorted */
 public class UnsortedWrapper<T extends Node> implements Wrapper<T> {
   public static final UnsortedWrapper<Node> NEWLINE_TEXT_WRAPPER_INSTANCE =
-      new UnsortedWrapper<>(NewlineText.INSTANCE);
+      new UnsortedWrapper<>(new NewlineText());
 
   /** The wrapped dom content. */
   private final T content;

sorter/src/test/java/sortpom/wrapper/TextWrapperCreatorTest.java

@@ -3,6 +3,7 @@
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import org.dom4j.dom.DOMText;
 import org.dom4j.tree.DefaultText;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -40,4 +41,10 @@ void testIsEmptyLine() {
     assertTrue(textWrapperCreator.isBlankLineOrLines(new DefaultText("\r\n\r\n")));
     assertFalse(textWrapperCreator.isBlankLineOrLines(new DefaultText("  ")));
   }
+
+  @Test
+  void textNodeWithNullParentShouldNotCrash() {
+    var text = new DOMText("Hi!");
+    assertFalse(textWrapperCreator.isElementSpacePreserved(text.getParent()));
+  }
 }