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diff --git a/javaparser-testing/src/test/java/com/github/javaparser/printer/lexicalpreservation/AbstractLexicalPreservingTest.java b/javaparser-testing/src/test/java/com/github/javaparser/printer/lexicalpreservation/AbstractLexicalPreservingTest.java
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+++ b/javaparser-testing/src/test/java/com/github/javaparser/printer/lexicalpreservation/AbstractLexicalPreservingTest.java
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+/*
+ * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
+ * Copyright (C) 2011, 2013-2016 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 com.github.javaparser.JavaParser;
+import com.github.javaparser.ast.CompilationUnit;
+import com.github.javaparser.ast.Node;
+import com.github.javaparser.ast.expr.Expression;
+import org.junit.Before;
+
+import java.io.IOException;
+
+import static com.github.javaparser.utils.TestUtils.readResource;
+import static org.junit.Assert.assertEquals;
+
+public abstract class AbstractLexicalPreservingTest {
+
+    protected CompilationUnit cu;
+    protected Expression expression;
+
+    protected void considerCode(String code) {
+        cu = LexicalPreservingPrinter.setup(JavaParser.parse(code));
+    }
+
+    protected void considerExpression(String code) {
+        expression = LexicalPreservingPrinter.setup(JavaParser.parseExpression(code));
+    }
+
+    protected String considerExample(String resourceName) throws IOException {
+        String code = readExample(resourceName);
+        considerCode(code);
+        return code;
+    }
+
+    protected String readExample(String resourceName) throws IOException {
+        return readResource("com/github/javaparser/lexical_preservation_samples/" + resourceName + ".java.txt");
+    }
+
+    protected void assertTransformed(String exampleName, Node node) throws IOException {
+        String expectedCode = readExample(exampleName + "_expected");
+        String actualCode = LexicalPreservingPrinter.print(node);
+        assertEquals(expectedCode, actualCode);
+    }
+
+    protected void assertUnchanged(String exampleName) throws IOException {
+        String code = considerExample(exampleName + "_original");
+        assertEquals(code, LexicalPreservingPrinter.print(cu != null ? cu : expression));
+    }
+
+    protected void assertTransformedToString(String expectedPartialCode, Node node) {
+        String actualCode = LexicalPreservingPrinter.print(node);
+        assertEquals(expectedPartialCode, actualCode);
+    }
+
+}