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StackFilteringTest.java
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StackFilteringTest.java
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/*
* JBoss, Home of Professional Open Source
* Copyright 2011, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
*
* @author <a href="http://community.jboss.org/people/LightGuard">Jason Porter</a>
*/
package org.jboss.seam.exception.filter.test;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.StringReader;
import java.text.MessageFormat;
import org.jboss.seam.exception.filter.ExceptionStackOutput;
import org.jboss.seam.exception.filter.StackFrame;
import org.jboss.seam.exception.filter.StackFrameFilter;
import org.jboss.seam.exception.filter.StackFrameFilterResult;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
public class StackFilteringTest {
@Test
public void terminateTest() {
final StackFrameFilter<NoClassDefFoundError> filter = new StackFrameFilter<NoClassDefFoundError>() {
@Override
public StackFrameFilterResult process(StackFrame frame) {
return StackFrameFilterResult.TERMINATE;
}
};
final NoClassDefFoundError noClassDefFoundError = new NoClassDefFoundError("java.lang.String Not found");
final ExceptionStackOutput<NoClassDefFoundError> exceptionStackOutput = new ExceptionStackOutput<NoClassDefFoundError>(noClassDefFoundError, filter);
final String result = exceptionStackOutput.printTrace();
final String expectedResult = MessageFormat.format(ExceptionStackOutput.ROOT_CAUSE_TEXT, noClassDefFoundError);
assertThat(result, is(expectedResult));
}
@Test
public void terminateAfterTest() throws IOException {
final StackFrameFilter<NoClassDefFoundError> filter = new StackFrameFilter<NoClassDefFoundError>() {
@Override
public StackFrameFilterResult process(StackFrame frame) {
return StackFrameFilterResult.TERMINATE_AFTER;
}
};
final NoClassDefFoundError noClassDefFoundError = new NoClassDefFoundError("java.lang.String Not found");
final ExceptionStackOutput<NoClassDefFoundError> exceptionStackOutput = new ExceptionStackOutput<NoClassDefFoundError>(noClassDefFoundError, filter);
final String result = exceptionStackOutput.printTrace();
final LineNumberReader lineNumberReader = new LineNumberReader(new StringReader(result));
while (lineNumberReader.readLine() != null) {
} // just get the line numbers
assertThat(lineNumberReader.getLineNumber(), is(2)); // The five at lines and the one root cause
}
@Test
public void dropRemainingTest() throws IOException {
final StackFrameFilter<NoClassDefFoundError> filter = new StackFrameFilter<NoClassDefFoundError>() {
@Override
public StackFrameFilterResult process(StackFrame frame) {
if (frame.getIndex() >= 5) {
return StackFrameFilterResult.DROP_REMAINING;
}
return StackFrameFilterResult.INCLUDE;
}
};
final NoClassDefFoundError noClassDefFoundError = new NoClassDefFoundError("java.lang.String Not found");
final ExceptionStackOutput<NoClassDefFoundError> exceptionStackOutput = new ExceptionStackOutput<NoClassDefFoundError>(noClassDefFoundError, filter);
final String result = exceptionStackOutput.printTrace();
final LineNumberReader lineNumberReader = new LineNumberReader(new StringReader(result));
while (lineNumberReader.readLine() != null) {
} // just get the line numbers
assertThat(lineNumberReader.getLineNumber(), is(6)); // The five at lines and the one root cause
}
@Test
public void dropTest() throws IOException {
final StackFrameFilter<NoClassDefFoundError> filter = new StackFrameFilter<NoClassDefFoundError>() {
@Override
public StackFrameFilterResult process(StackFrame frame) {
// We want to drop calls referring to reflection
if (frame.isMarkSet("reflections.invoke")) {
if (!frame.getStackTraceElement().toString().contains("reflect")) {
frame.clearMark("reflections.invoke");
return StackFrameFilterResult.INCLUDE;
}
}
if (frame.getStackTraceElement().toString().contains("reflect")) {
frame.mark("reflections.invoke");
return StackFrameFilterResult.DROP;
}
if (frame.getIndex() > 18) {
return StackFrameFilterResult.DROP_REMAINING;
}
return StackFrameFilterResult.INCLUDE;
}
};
final NoClassDefFoundError noClassDefFoundError = new NoClassDefFoundError("java.lang.String Not found");
final ExceptionStackOutput<NoClassDefFoundError> exceptionStackOutput = new ExceptionStackOutput<NoClassDefFoundError>(noClassDefFoundError, filter);
final String result = exceptionStackOutput.printTrace();
final LineNumberReader lineNumberReader = new LineNumberReader(new StringReader(result));
int reflectLines = 0;
String line;
while ((line = lineNumberReader.readLine()) != null) {
if (line.contains("reflect")) {
reflectLines++;
}
System.out.println(line);
}
assertThat("Actual: " + result, lineNumberReader.getLineNumber() < 22, is(true));
assertThat(reflectLines, is(0));
}
@Test
public void testBuldingWrappedExceptionsWorksCorrectly() throws IOException {
Exception e1 = new NullPointerException("Inside");
Exception e2 = new RuntimeException("Outer", e1);
ExceptionStackOutput<Exception> exceptionStackOutput = new ExceptionStackOutput<Exception>(e2);
final String result = exceptionStackOutput.printTrace();
final LineNumberReader lineNumberReader = new LineNumberReader(new StringReader(result));
String line;
while ((line = lineNumberReader.readLine()) != null) {
if (lineNumberReader.getLineNumber() == 3) {
assertThat(line.startsWith("Wrapped"), is(true));
}
}
}
}