Merge pull request #2813 from jlerbsc/issue-2806

Fix issue 2806 EOL separator problems on windows

javaparser-core-testing/src/test/java/com/github/javaparser/printer/lexicalpreservation/Issue2806Test.java

@@ -0,0 +1,59 @@
+
+/*
+ * Copyright (C) 2015-2016 Federico Tomassetti
+ * Copyright (C) 2017-2019 The JavaParser Team.
+ *
+ * This file is part of JavaParser.
+ *
+ * JavaParser can be used either under the terms of
+ * a) the GNU Lesser General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ * b) the terms of the Apache License
+ *
+ * You should have received a copy of both licenses in LICENCE.LGPL and
+ * LICENCE.APACHE. Please refer to those files for details.
+ *
+ * JavaParser is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ */
+
+package com.github.javaparser.printer.lexicalpreservation;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+import com.github.javaparser.JavaParser;
+import com.github.javaparser.ParserConfiguration;
+import com.github.javaparser.ast.CompilationUnit;
+import com.github.javaparser.ast.ImportDeclaration;
+
+class Issue2806Test {
+
+    private JavaParser javaParser;
+
+    @Test
+    void importIsAddedOnTheSameLine() {
+        String junit4 = "import java.lang.IllegalArgumentException;\n" +
+                "\n" +
+                "public class A {\n" +
+                "}";
+        String junit5 = "import java.lang.IllegalArgumentException;\n" +
+                "import java.nio.file.Paths;\n" +
+                "\n" +
+                "public class A {\n" +
+                "}";
+        JavaParser parser = new JavaParser(new ParserConfiguration().setLexicalPreservationEnabled(true));
+        CompilationUnit cu = parser.parse(junit4).getResult().get();
+        LexicalPreservingPrinter.setup(cu);
+        ImportDeclaration importDeclaration = new ImportDeclaration("java.nio.file.Paths", false, false);
+        CompilationUnit compilationUnit = cu.addImport(importDeclaration);
+        String out = LexicalPreservingPrinter.print(compilationUnit);
+        assertThat(out, equalTo(junit5));
+    }
+
+}

javaparser-core/src/main/java/com/github/javaparser/printer/lexicalpreservation/Difference.java

@@ -506,6 +506,9 @@ private void applyKeptDiffElement(Kept kept, TextElement originalElement, boolea
             if (kept.getTokenType() == originalTextToken.getTokenKind()) {
                 originalIndex++;
                 diffIndex++;
+            } else if (kept.isNewLine() && originalTextToken.isNewline()) {
+                originalIndex++;
+                diffIndex++;
             } else if (kept.isNewLine() && originalTextToken.isSpaceOrTab()) {
                 originalIndex++;
                 diffIndex++;