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JUnit is a unit testing framework for Java, created by Erich Gamma and Kent Beck.
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package junit.runner;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringReader;
import java.io.StringWriter;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.text.NumberFormat;
import java.util.Properties;
import junit.framework.AssertionFailedError;
import junit.framework.Test;
import junit.framework.TestListener;
import junit.framework.TestSuite;
/**
* Base class for all test runners.
* This class was born live on stage in Sardinia during XP2000.
*/
public abstract class BaseTestRunner implements TestListener {
public static final String SUITE_METHODNAME = "suite";
private static Properties fPreferences;
static int fgMaxMessageLength = 500;
static boolean fgFilterStack = true;
boolean fLoading = true;
/*
* Implementation of TestListener
*/
public synchronized void startTest(Test test) {
testStarted(test.toString());
}
protected static void setPreferences(Properties preferences) {
fPreferences = preferences;
}
protected static Properties getPreferences() {
if (fPreferences == null) {
fPreferences = new Properties();
fPreferences.put("loading", "true");
fPreferences.put("filterstack", "true");
readPreferences();
}
return fPreferences;
}
public static void savePreferences() throws IOException {
FileOutputStream fos = new FileOutputStream(getPreferencesFile());
try {
getPreferences().store(fos, "");
} finally {
fos.close();
}
}
public static void setPreference(String key, String value) {
getPreferences().put(key, value);
}
public synchronized void endTest(Test test) {
testEnded(test.toString());
}
public synchronized void addError(final Test test, final Throwable e) {
testFailed(TestRunListener.STATUS_ERROR, test, e);
}
public synchronized void addFailure(final Test test, final AssertionFailedError e) {
testFailed(TestRunListener.STATUS_FAILURE, test, e);
}
// TestRunListener implementation
public abstract void testStarted(String testName);
public abstract void testEnded(String testName);
public abstract void testFailed(int status, Test test, Throwable e);
/**
* Returns the Test corresponding to the given suite. This is
* a template method, subclasses override runFailed(), clearStatus().
*/
public Test getTest(String suiteClassName) {
if (suiteClassName.length() <= 0) {
clearStatus();
return null;
}
Class testClass = null;
try {
testClass = loadSuiteClass(suiteClassName);
} catch (ClassNotFoundException e) {
String clazz = e.getMessage();
if (clazz == null) {
clazz = suiteClassName;
}
runFailed("Class not found \"" + clazz + "\"");
return null;
} catch (Exception e) {
runFailed("Error: " + e.toString());
return null;
}
Method suiteMethod = null;
try {
suiteMethod = testClass.getMethod(SUITE_METHODNAME);
} catch (Exception e) {
// try to extract a test suite automatically
clearStatus();
return new TestSuite(testClass);
}
if (!Modifier.isStatic(suiteMethod.getModifiers())) {
runFailed("Suite() method must be static");
return null;
}
Test test = null;
try {
test = (Test) suiteMethod.invoke(null); // static method
if (test == null) {
return test;
}
} catch (InvocationTargetException e) {
runFailed("Failed to invoke suite():" + e.getTargetException().toString());
return null;
} catch (IllegalAccessException e) {
runFailed("Failed to invoke suite():" + e.toString());
return null;
}
clearStatus();
return test;
}
/**
* Returns the formatted string of the elapsed time.
*/
public String elapsedTimeAsString(long runTime) {
return NumberFormat.getInstance().format((double) runTime / 1000);
}
/**
* Processes the command line arguments and
* returns the name of the suite class to run or null
*/
protected String processArguments(String[] args) {
String suiteName = null;
for (int i = 0; i < args.length; i++) {
if (args[i].equals("-noloading")) {
setLoading(false);
} else if (args[i].equals("-nofilterstack")) {
fgFilterStack = false;
} else if (args[i].equals("-c")) {
if (args.length > i + 1) {
suiteName = extractClassName(args[i + 1]);
} else {
System.out.println("Missing Test class name");
}
i++;
} else {
suiteName = args[i];
}
}
return suiteName;
}
/**
* Sets the loading behaviour of the test runner
*/
public void setLoading(boolean enable) {
fLoading = enable;
}
/**
* Extract the class name from a String in VA/Java style
*/
public String extractClassName(String className) {
if (className.startsWith("Default package for")) {
return className.substring(className.lastIndexOf(".") + 1);
}
return className;
}
/**
* Truncates a String to the maximum length.
*/
public static String truncate(String s) {
if (fgMaxMessageLength != -1 && s.length() > fgMaxMessageLength) {
s = s.substring(0, fgMaxMessageLength) + "...";
}
return s;
}
/**
* Override to define how to handle a failed loading of
* a test suite.
*/
protected abstract void runFailed(String message);
/**
* Returns the loaded Class for a suite name.
*/
protected Class loadSuiteClass(String suiteClassName) throws ClassNotFoundException {
return Class.forName(suiteClassName);
}
/**
* Clears the status message.
*/
protected void clearStatus() { // Belongs in the GUI TestRunner class
}
protected boolean useReloadingTestSuiteLoader() {
return getPreference("loading").equals("true") && fLoading;
}
private static File getPreferencesFile() {
String home = System.getProperty("user.home");
return new File(home, "junit.properties");
}
private static void readPreferences() {
InputStream is = null;
try {
is = new FileInputStream(getPreferencesFile());
setPreferences(new Properties(getPreferences()));
getPreferences().load(is);
} catch (IOException ignored) {
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e1) {
}
}
}
public static String getPreference(String key) {
return getPreferences().getProperty(key);
}
public static int getPreference(String key, int dflt) {
String value = getPreference(key);
int intValue = dflt;
if (value == null) {
return intValue;
}
try {
intValue = Integer.parseInt(value);
} catch (NumberFormatException ne) {
}
return intValue;
}
/**
* Returns a filtered stack trace
*/
public static String getFilteredTrace(Throwable e) {
StringWriter stringWriter = new StringWriter();
PrintWriter writer = new PrintWriter(stringWriter);
e.printStackTrace(writer);
String trace = stringWriter.toString();
return BaseTestRunner.getFilteredTrace(trace);
}
/**
* Filters stack frames from internal JUnit classes
*/
public static String getFilteredTrace(String stack) {
if (showStackRaw()) {
return stack;
}
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
StringReader sr = new StringReader(stack);
BufferedReader br = new BufferedReader(sr);
String line;
try {
while ((line = br.readLine()) != null) {
if (!filterLine(line)) {
pw.println(line);
}
}
} catch (Exception IOException) {
return stack; // return the stack unfiltered
}
return sw.toString();
}
protected static boolean showStackRaw() {
return !getPreference("filterstack").equals("true") || fgFilterStack == false;
}
static boolean filterLine(String line) {
String[] patterns = new String[]{
"junit.framework.TestCase",
"junit.framework.TestResult",
"junit.framework.TestSuite",
"junit.framework.Assert.", // don't filter AssertionFailure
"junit.swingui.TestRunner",
"junit.awtui.TestRunner",
"junit.textui.TestRunner",
"java.lang.reflect.Method.invoke("
};
for (int i = 0; i < patterns.length; i++) {
if (line.indexOf(patterns[i]) > 0) {
return true;
}
}
return false;
}
static {
fgMaxMessageLength = getPreference("maxmessage", fgMaxMessageLength);
}
}