JMeter example source code file (JUnitSampler.java)
The JMeter JUnitSampler.java source code/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*
*/
package org.apache.jmeter.protocol.java.sampler;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Enumeration;
import junit.framework.AssertionFailedError;
import junit.framework.Protectable;
import junit.framework.TestCase;
import junit.framework.TestFailure;
import junit.framework.TestResult;
import org.apache.jmeter.samplers.AbstractSampler;
import org.apache.jmeter.samplers.Entry;
import org.apache.jmeter.samplers.SampleResult;
import org.apache.jmeter.testelement.ThreadListener;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.Test.None;
/**
*
* This is a basic implementation that runs a single test method of
* a JUnit test case. The current implementation will use the string
* constructor first. If the test class does not declare a string
* constructor, the sampler will try empty constructor.
*/
public class JUnitSampler extends AbstractSampler implements ThreadListener {
private static final Logger log = LoggingManager.getLoggerForClass();
private static final long serialVersionUID = 240L; // Remember to change this when the class changes ...
//++ JMX file attributes - do not change
private static final String CLASSNAME = "junitSampler.classname";
private static final String CONSTRUCTORSTRING = "junitsampler.constructorstring";
private static final String METHOD = "junitsampler.method";
private static final String ERROR = "junitsampler.error";
private static final String ERRORCODE = "junitsampler.error.code";
private static final String FAILURE = "junitsampler.failure";
private static final String FAILURECODE = "junitsampler.failure.code";
private static final String SUCCESS = "junitsampler.success";
private static final String SUCCESSCODE = "junitsampler.success.code";
private static final String FILTER = "junitsampler.pkg.filter";
private static final String DOSETUP = "junitsampler.exec.setup";
private static final String APPEND_ERROR = "junitsampler.append.error";
private static final String APPEND_EXCEPTION = "junitsampler.append.exception";
private static final String JUNIT4 = "junitsampler.junit4";
//-- JMX file attributes - do not change
private static final String SETUP = "setUp";
private static final String TEARDOWN = "tearDown";
// the Method objects for setUp (@Before) and tearDown (@After) methods
// Will be null if not provided or not required
private transient Method setUpMethod;
private transient Method tearDownMethod;
// The TestCase to run
private transient TestCase testCase;
// The test object, i.e. the instance of the class containing the test method
// This is the same as testCase for JUnit3 tests
// but different for JUnit4 tests which use a wrapper
private transient Object testObject;
// The method name to be invoked
private transient String methodName;
// The name of the class containing the method
private transient String className;
// The wrapper used to invoke the method
private transient Protectable protectable;
public JUnitSampler(){
}
/**
* Method tries to get the setUp and tearDown method for the class
* @param testObject
*/
private void initMethodObjects(Object testObject){
setUpMethod = null;
tearDownMethod = null;
if (!getDoNotSetUpTearDown()) {
setUpMethod = getJunit4() ?
getMethodWithAnnotation(testObject, Before.class)
:
getMethod(testObject, SETUP);
tearDownMethod = getJunit4() ?
getMethodWithAnnotation(testObject, After.class)
:
getMethod(testObject, TEARDOWN);
}
}
/**
* Sets the Classname attribute of the JavaConfig object
*
* @param classname
* the new Classname value
*/
public void setClassname(String classname)
{
setProperty(CLASSNAME, classname);
}
/**
* Gets the Classname attribute of the JavaConfig object
*
* @return the Classname value
*/
public String getClassname()
{
return getPropertyAsString(CLASSNAME);
}
/**
* Set the string label used to create an instance of the
* test with the string constructor.
* @param constr
*/
public void setConstructorString(String constr)
{
setProperty(CONSTRUCTORSTRING,constr);
}
/**
* get the string passed to the string constructor
*/
public String getConstructorString()
{
return getPropertyAsString(CONSTRUCTORSTRING);
}
/**
* Return the name of the method to test
*/
public String getMethod(){
return getPropertyAsString(METHOD);
}
/**
* Method should add the JUnit testXXX method to the list at
* the end, since the sequence matters.
* @param methodName
*/
public void setMethod(String methodName){
setProperty(METHOD,methodName);
}
/**
* get the success message
*/
public String getSuccess(){
return getPropertyAsString(SUCCESS);
}
/**
* set the success message
* @param success
*/
public void setSuccess(String success){
setProperty(SUCCESS,success);
}
/**
* get the success code defined by the user
*/
public String getSuccessCode(){
return getPropertyAsString(SUCCESSCODE);
}
/**
* set the succes code. the success code should
* be unique.
* @param code
*/
public void setSuccessCode(String code){
setProperty(SUCCESSCODE,code);
}
/**
* get the failure message
*/
public String getFailure(){
return getPropertyAsString(FAILURE);
}
/**
* set the failure message
* @param fail
*/
public void setFailure(String fail){
setProperty(FAILURE,fail);
}
/**
* The failure code is used by other components
*/
public String getFailureCode(){
return getPropertyAsString(FAILURECODE);
}
/**
* Provide some unique code to denote a type of failure
* @param code
*/
public void setFailureCode(String code){
setProperty(FAILURECODE,code);
}
/**
* return the descriptive error for the test
*/
public String getError(){
return getPropertyAsString(ERROR);
}
/**
* provide a descriptive error for the test method. For
* a description of the difference between failure and
* error, please refer to the following url
* http://junit.sourceforge.net/doc/faq/faq.htm#tests_9
* @param error
*/
public void setError(String error){
setProperty(ERROR,error);
}
/**
* return the error code for the test method. it should
* be an unique error code.
*/
public String getErrorCode(){
return getPropertyAsString(ERRORCODE);
}
/**
* provide an unique error code for when the test
* does not pass the assert test.
* @param code
*/
public void setErrorCode(String code){
setProperty(ERRORCODE,code);
}
/**
* return the comma separated string for the filter
*/
public String getFilterString(){
return getPropertyAsString(FILTER);
}
/**
* set the filter string in comman separated format
* @param text
*/
public void setFilterString(String text){
setProperty(FILTER,text);
}
/**
* if the sample shouldn't call setup/teardown, the
* method returns true. It's meant for onetimesetup
* and onetimeteardown.
*/
public boolean getDoNotSetUpTearDown(){
return getPropertyAsBoolean(DOSETUP);
}
/**
* set the setup/teardown option
* @param setup
*/
public void setDoNotSetUpTearDown(boolean setup){
setProperty(DOSETUP,String.valueOf(setup));
}
/**
* If append error is not set, by default it is set to false,
* which means users have to explicitly set the sampler to
* append the assert errors. Because of how junit works, there
* should only be one error
*/
public boolean getAppendError() {
return getPropertyAsBoolean(APPEND_ERROR,false);
}
/**
* Set whether to append errors or not.
*
* @param error the setting to apply
*/
public void setAppendError(boolean error) {
setProperty(APPEND_ERROR,String.valueOf(error));
}
/**
* If append exception is not set, by default it is set to false.
* Users have to explicitly set it to true to see the exceptions
* in the result tree.
*/
public boolean getAppendException() {
return getPropertyAsBoolean(APPEND_EXCEPTION,false);
}
/**
* Set whether to append exceptions or not.
*
* @param exc the setting to apply.
*/
public void setAppendException(boolean exc) {
setProperty(APPEND_EXCEPTION,String.valueOf(exc));
}
/**
* Check if JUnit4 (annotations) are to be used instead of
* the JUnit3 style (TestClass and specific method names)
*
* @return true if JUnit4 (annotations) are to be used.
* Default is false.
*/
public boolean getJunit4() {
return getPropertyAsBoolean(JUNIT4, false);
}
/**
* Set whether to use JUnit4 style or not.
* @param junit4 true if JUnit4 style is to be used.
*/
public void setJunit4(boolean junit4) {
setProperty(JUNIT4, junit4, false);
}
/** {@inheritDoc} */
public SampleResult sample(Entry entry) {
SampleResult sresult = new SampleResult();
sresult.setSampleLabel(getName());// Bug 41522 - don't use rlabel here
sresult.setSamplerData(className + "." + methodName);
sresult.setDataType(SampleResult.TEXT);
// Assume success
sresult.setSuccessful(true);
sresult.setResponseMessage(getSuccess());
sresult.setResponseCode(getSuccessCode());
if (this.testCase != null){
// create a new TestResult
TestResult tr = new TestResult();
final TestCase theClazz = this.testCase;
try {
if (setUpMethod != null){
setUpMethod.invoke(this.testObject,new Object[0]);
}
sresult.sampleStart();
tr.startTest(this.testCase);
// Do not use TestCase.run(TestResult) method, since it will
// call setUp and tearDown. Doing that will result in calling
// the setUp and tearDown method twice and the elapsed time
// will include setup and teardown.
tr.runProtected(theClazz, protectable);
tr.endTest(this.testCase);
sresult.sampleEnd();
if (tearDownMethod != null){
tearDownMethod.invoke(testObject,new Object[0]);
}
} catch (InvocationTargetException e) {
Throwable cause = e.getCause();
if (cause instanceof AssertionFailedError){
tr.addFailure(theClazz, (AssertionFailedError) cause);
} else if (cause instanceof AssertionError) {
// Convert JUnit4 failure to Junit3 style
AssertionFailedError afe = new AssertionFailedError(cause.toString());
// copy the original stack trace
afe.setStackTrace(cause.getStackTrace());
tr.addFailure(theClazz, afe);
} else if (cause != null) {
tr.addError(theClazz, cause);
} else {
tr.addError(theClazz, e);
}
} catch (IllegalAccessException e) {
tr.addError(theClazz, e);
} catch (IllegalArgumentException e) {
tr.addError(theClazz, e);
}
if ( !tr.wasSuccessful() ){
sresult.setSuccessful(false);
StringBuilder buf = new StringBuilder();
StringBuilder buftrace = new StringBuilder();
Enumeration<TestFailure> en;
if (getAppendError()) {
en = tr.failures();
if (en.hasMoreElements()){
sresult.setResponseCode(getFailureCode());
buf.append( getFailure() );
buf.append("\n");
}
while (en.hasMoreElements()){
TestFailure item = en.nextElement();
buf.append( "Failure -- ");
buf.append( item.toString() );
buf.append("\n");
buftrace.append( "Failure -- ");
buftrace.append( item.toString() );
buftrace.append("\n");
buftrace.append( "Trace -- ");
buftrace.append( item.trace() );
}
en = tr.errors();
if (en.hasMoreElements()){
sresult.setResponseCode(getErrorCode());
buf.append( getError() );
buf.append("\n");
}
while (en.hasMoreElements()){
TestFailure item = en.nextElement();
buf.append( "Error -- ");
buf.append( item.toString() );
buf.append("\n");
buftrace.append( "Error -- ");
buftrace.append( item.toString() );
buftrace.append("\n");
buftrace.append( "Trace -- ");
buftrace.append( item.trace() );
}
}
sresult.setResponseMessage(buf.toString());
sresult.setResponseData(buftrace.toString(), null);
}
} else {
// we should log a warning, but allow the test to keep running
sresult.setSuccessful(false);
// this should be externalized to the properties
sresult.setResponseMessage("failed to create an instance of the class");
sresult.setResponseCode(getErrorCode());
}
return sresult;
}
/**
* If the method is not able to create a new instance of the
* class, it returns null and logs all the exceptions at
* warning level.
*/
private static Object getClassInstance(String className, String label){
Object testclass = null;
if (className != null){
Constructor<?> con = null;
Constructor<?> strCon = null;
Class<?> theclazz = null;
Object[] strParams = null;
Object[] params = null;
try
{
theclazz =
Thread.currentThread().getContextClassLoader().loadClass(className.trim());
} catch (ClassNotFoundException e) {
log.warn("ClassNotFoundException:: " + e.getMessage());
}
if (theclazz != null) {
// first we see if the class declares a string
// constructor. if it is doesn't we look for
// empty constructor.
try {
strCon = theclazz.getDeclaredConstructor(
new Class[] {String.class});
// we have to check and make sure the constructor is
// accessible. if we didn't it would throw an exception
// and cause a NPE.
if (label == null || label.length() == 0) {
label = className;
}
if (strCon.getModifiers() == Modifier.PUBLIC) {
strParams = new Object[]{label};
} else {
strCon = null;
}
} catch (NoSuchMethodException e) {
log.info("String constructor:: " + e.getMessage());
}
try {
con = theclazz.getDeclaredConstructor(new Class[0]);
if (con != null){
params = new Object[]{};
}
} catch (NoSuchMethodException e) {
log.info("Empty constructor:: " + e.getMessage());
}
try {
// if the string constructor is not null, we use it.
// if the string constructor is null, we use the empty
// constructor to get a new instance
if (strCon != null) {
testclass = strCon.newInstance(strParams);
} else if (con != null){
testclass = con.newInstance(params);
}
} catch (InvocationTargetException e) {
log.warn(e.getMessage());
} catch (InstantiationException e) {
log.info(e.getMessage());
} catch (IllegalAccessException e) {
log.info(e.getMessage());
}
}
}
return testclass;
}
/**
* Get a method.
* @param clazz the classname (may be null)
* @param method the method name (may be null)
* @return the method or null if an error occurred
* (or either parameter is null)
*/
private Method getMethod(Object clazz, String method){
if (clazz != null && method != null){
try {
return clazz.getClass().getMethod(method,new Class[0]);
} catch (NoSuchMethodException e) {
log.warn(e.getMessage());
}
}
return null;
}
private Method getMethodWithAnnotation(Object clazz, Class<? extends Annotation> annotation) {
if(null != clazz && null != annotation) {
for(Method m : clazz.getClass().getMethods()) {
if(m.isAnnotationPresent(annotation)) {
return m;
}
}
}
return null;
}
/*
* Wrapper to convert a JUnit4 class into a TestCase
*
* TODO - work out how to convert JUnit4 assertions so they are treated as failures rather than errors
*/
private class AnnotatedTestCase extends TestCase {
private final Method method;
private final Class<? extends Throwable> expectedException;
private final long timeout;
public AnnotatedTestCase(Method method, Class<? extends Throwable> expectedException2, long timeout) {
this.method = method;
this.expectedException = expectedException2;
this.timeout = timeout;
}
@Override
protected void runTest() throws Throwable {
try {
long start = System.currentTimeMillis();
method.invoke(testObject, (Object[])null);
if (expectedException != None.class) {
throw new AssertionFailedError(
"No error was generated for a test case which specifies an error.");
}
if (timeout > 0){
long elapsed = System.currentTimeMillis() - start;
if (elapsed > timeout) {
throw new AssertionFailedError("Test took longer than the specified timeout.");
}
}
} catch (InvocationTargetException e) {
Throwable thrown = e.getCause();
if (thrown == null) { // probably should not happen
throw e;
}
if (expectedException == None.class){
// Convert JUnit4 AssertionError failures to JUnit3 style so
// will be treated as failure rather than error.
if (thrown instanceof AssertionError && !(thrown instanceof AssertionFailedError)){
AssertionFailedError afe = new AssertionFailedError(thrown.toString());
// copy the original stack trace
afe.setStackTrace(thrown.getStackTrace());
throw afe;
}
throw thrown;
}
if (!expectedException.isAssignableFrom(thrown.getClass())){
throw new AssertionFailedError("The wrong exception was thrown from the test case");
}
}
}
}
public void threadFinished() {
}
/**
* Set up all variables that don't change between samples.
*/
public void threadStarted() {
testObject = null;
testCase = null;
methodName = getMethod();
className = getClassname();
final Method m;
protectable = null;
String rlabel = getConstructorString();
if (rlabel.length()== 0) {
rlabel = JUnitSampler.class.getName();
}
this.testObject = getClassInstance(className,rlabel);
if (this.testObject != null){
initMethodObjects(this.testObject);
m = getMethod(this.testObject,methodName);
if (getJunit4()){
Class<? extends Throwable> expectedException = None.class;
long timeout = 0;
Test annotation = m.getAnnotation(Test.class);
if(null != annotation) {
expectedException = annotation.expected();
timeout = annotation.timeout();
}
final AnnotatedTestCase at = new AnnotatedTestCase(m, expectedException, timeout);
testCase = at;
protectable = new Protectable() {
public void protect() throws Throwable {
at.runTest();
}
};
} else {
this.testCase = (TestCase) this.testObject;
final Object theClazz = this.testObject; // Must be final to create instance
protectable = new Protectable() {
public void protect() throws Throwable {
try {
m.invoke(theClazz,new Object[0]);
} catch (InvocationTargetException e) {
/*
* Calling a method via reflection results in wrapping any
* Exceptions in ITE; unwrap these here so runProtected can
* allocate them correctly.
*/
Throwable t = e.getCause();
if (t != null) {
throw t;
}
throw e;
}
}
};
}
if (this.testCase != null){
this.testCase.setName(methodName);
}
}
}
}
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