/*
* FindBugs - Find Bugs in Java programs
* Copyright (C) 2003-2008 University of Maryland
*
* Author: Graham Allan
*
* 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 edu.umd.cs.findbugs.filter;
import static org.junit.Assert.*;
import static org.junit.matchers.JUnitMatchers.containsString;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.junit.Test;
import edu.umd.cs.findbugs.BugInstance;
import edu.umd.cs.findbugs.xml.OutputStreamXMLOutput;
import edu.umd.cs.findbugs.xml.XMLOutput;
public class NotMatcherTest {
private final BugInstance bug = new BugInstance("UUF_UNUSED_FIELD", 0);
@Test
public void invertsResultsFromWrappedMatcher_doesntMatchWhenWrappedDoesMatch() throws Exception {
Matcher wrappedMatcher = new TestMatcher(true);
NotMatcher notMatcher = new NotMatcher();
notMatcher.addChild(wrappedMatcher);
assertFalse(notMatcher.match(bug));
}
@Test
public void invertsResultsFromWrappedMatcher_doesMatchWhenWrappedDoesnt() throws Exception {
Matcher wrappedMatcher = new TestMatcher(false);
NotMatcher notMatcher = new NotMatcher();
notMatcher.addChild(wrappedMatcher);
assertTrue(notMatcher.match(bug));
}
@Test
public void writeXMLOutputAddsNotTagsAroundWrappedMatchersOutput() throws Exception {
Matcher wrappedMatcher = new TestMatcher(true);
NotMatcher notMatcher = new NotMatcher();
notMatcher.addChild(wrappedMatcher);
String xmlOutputCreated = writeXMLAndGetStringOutput(notMatcher);
assertTrue(containsString("<Not>").matches(xmlOutputCreated));
assertTrue(containsString("<TestMatch>").matches(xmlOutputCreated));
assertTrue(containsString("</TestMatch>").matches(xmlOutputCreated));
assertTrue(containsString("</Not>").matches(xmlOutputCreated));
}
@Test
public void canReturnChildMatcher() {
Matcher wrappedMatcher = new TestMatcher(true);
NotMatcher notMatcher = new NotMatcher();
notMatcher.addChild(wrappedMatcher);
assertSame("Should return child matcher.", wrappedMatcher, notMatcher.originalMatcher());
}
@Test(expected=IllegalStateException.class)
public void throwsExceptionWhenTryingToGetNonExistentChildMatcher() {
new NotMatcher().originalMatcher();
}
private String writeXMLAndGetStringOutput(NotMatcher notMatcher) throws IOException {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
XMLOutput xmlOutput = new OutputStreamXMLOutput(outputStream);
notMatcher.writeXML(xmlOutput, false);
xmlOutput.finish();
String xmlOutputCreated = outputStream.toString();
return xmlOutputCreated;
}
private static class TestMatcher implements Matcher {
private final boolean alwaysMatches;
public TestMatcher(boolean alwaysMatches) {
this.alwaysMatches = alwaysMatches;
}
@Override
public boolean match(BugInstance bugInstance) {
return alwaysMatches;
}
@Override
public void writeXML(XMLOutput xmlOutput, boolean disabled) throws IOException {
xmlOutput.openTag("TestMatch");
xmlOutput.closeTag("TestMatch");
}
}
}