////////////////////////////////////////////////////////////////////////////////
// checkstyle: Checks Java source code for adherence to a set of rules.
// Copyright (C) 2001-2017 the original author or authors.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
////////////////////////////////////////////////////////////////////////////////
package com.puppycrawl.tools.checkstyle.api;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import java.io.File;
import java.lang.reflect.Method;
import java.text.MessageFormat;
import java.util.Locale;
import org.junit.Test;
import com.puppycrawl.tools.checkstyle.TreeWalker;
/**
* TestCase to check DetailAST.
* @author Oliver Burn
*/
public class DetailASTTest {
private static Method getSetParentMethod() throws Exception {
final Class<DetailAST> detailAstClass = DetailAST.class;
final Method setParentMethod =
detailAstClass.getDeclaredMethod("setParent", DetailAST.class);
setParentMethod.setAccessible(true);
return setParentMethod;
}
@Test
public void testGetChildCount() throws Exception {
final DetailAST root = new DetailAST();
final DetailAST firstLevelA = new DetailAST();
final DetailAST firstLevelB = new DetailAST();
final DetailAST secondLevelA = new DetailAST();
root.setFirstChild(firstLevelA);
final Method setParentMethod = getSetParentMethod();
setParentMethod.invoke(firstLevelA, root);
firstLevelA.setFirstChild(secondLevelA);
firstLevelA.setNextSibling(firstLevelB);
setParentMethod.invoke(firstLevelB, root);
setParentMethod.invoke(secondLevelA, root);
assertEquals(0, secondLevelA.getChildCount());
assertEquals(0, firstLevelB.getChildCount());
assertEquals(1, firstLevelA.getChildCount());
assertEquals(2, root.getChildCount());
assertEquals(2, root.getChildCount());
assertNull(root.getPreviousSibling());
assertNull(firstLevelA.getPreviousSibling());
assertNull(secondLevelA.getPreviousSibling());
assertEquals(firstLevelA, firstLevelB.getPreviousSibling());
}
@Test
public void testSetSiblingNull() throws Exception {
final DetailAST root = new DetailAST();
final DetailAST firstLevelA = new DetailAST();
root.setFirstChild(firstLevelA);
assertEquals(1, root.getChildCount());
getSetParentMethod().invoke(firstLevelA, root);
firstLevelA.addPreviousSibling(null);
firstLevelA.addNextSibling(null);
assertEquals(1, root.getChildCount());
}
@Test
public void testInsertSiblingBetween() throws Exception {
final DetailAST root = new DetailAST();
final DetailAST firstLevelA = new DetailAST();
final DetailAST firstLevelB = new DetailAST();
final DetailAST firstLevelC = new DetailAST();
assertEquals(0, root.getChildCount());
root.setFirstChild(firstLevelA);
final Method setParentMethod = getSetParentMethod();
setParentMethod.invoke(firstLevelA, root);
assertEquals(1, root.getChildCount());
firstLevelA.addNextSibling(firstLevelB);
setParentMethod.invoke(firstLevelB, root);
assertEquals(firstLevelB, firstLevelA.getNextSibling());
firstLevelA.addNextSibling(firstLevelC);
setParentMethod.invoke(firstLevelC, root);
assertEquals(firstLevelC, firstLevelA.getNextSibling());
}
@Test
public void testTreeStructure() throws Exception {
checkDir(new File("src/test/resources/com/puppycrawl/tools/checkstyle"));
}
private static void checkDir(File dir) throws Exception {
final File[] files = dir.listFiles(file -> {
return (file.getName().endsWith(".java")
|| file.isDirectory())
&& !file.getName().endsWith("InputGrammar.java");
});
for (File file : files) {
if (file.isFile()) {
checkFile(file.getCanonicalPath());
}
else if (file.isDirectory()) {
checkDir(file);
}
}
}
private static void checkFile(String filename) throws Exception {
final FileText text = new FileText(new File(filename),
System.getProperty("file.encoding", "UTF-8"));
final FileContents contents = new FileContents(text);
final DetailAST rootAST = TreeWalker.parse(contents);
if (rootAST != null) {
checkTree(filename, rootAST);
}
}
private static void checkTree(final String filename, final DetailAST root) {
DetailAST curNode = root;
DetailAST parent = null;
DetailAST prev = null;
while (curNode != null) {
checkNode(curNode, parent, prev, filename, root);
DetailAST toVisit = curNode.getFirstChild();
if (toVisit != null) {
parent = curNode;
curNode = toVisit;
prev = null;
}
else {
while (curNode != null && toVisit == null) {
toVisit = curNode.getNextSibling();
if (toVisit != null) {
prev = curNode;
curNode = toVisit;
}
else {
curNode = curNode.getParent();
if (curNode != null) {
parent = curNode.getParent();
}
}
}
}
}
}
private static void checkNode(final DetailAST node,
final DetailAST parent,
final DetailAST prev,
final String filename,
final DetailAST root) {
final Object[] params = {
node, parent, prev, filename, root,
};
final MessageFormat badParentFormatter = new MessageFormat(
"Bad parent node={0} parent={1} filename={3} root={4}", Locale.ROOT);
final String badParentMsg = badParentFormatter.format(params);
assertEquals(badParentMsg, parent, node.getParent());
final MessageFormat badPrevFormatter = new MessageFormat(
"Bad prev node={0} prev={2} parent={1} filename={3} root={4}", Locale.ROOT);
final String badPrevMsg = badPrevFormatter.format(params);
assertEquals(badPrevMsg, prev, node.getPreviousSibling());
}
}