Skip to main content


Eclipse Community Forums
Forum Search:

Search      Help    Register    Login    Home
Home » Eclipse Projects » Plugin Development Environment (PDE) » Run some JUnit tests and check coverage
Run some JUnit tests and check coverage [message #742290] Thu, 20 October 2011 11:08 Go to next message
Zé  arlos is currently offline Zé arlosFriend
Messages: 15
Registered: October 2011
Junior Member
Hi,

I am student of 5th year course in Master in Informatics and Computing Engineering at the Faculty of Engineering University of Porto (Portugal).
And now I am developing an Eclipse Plugin that use JUnit to run tests and JaCoCo to see the coverage of those tests.

I create a simple Plug-In Project in Eclipse with several action buttons, and for first action button I have this piece of code:

final String path = "/home/zecarlos/FEUP/runtime-EclipseApplication/Calculator/bin/";	
final String targetName = "functions.test.AddTest";
final String className = "functions.Calculadora";

InputStream inputTarget = new FileInputStream(path + targetName.replace('.', '/') + ".class");
InputStream inputClass = new FileInputStream(path + className.replace('.', '/') + ".class");

// For instrumentation and runtime we need a IRuntime instance to collect execution data
final IRuntime runtime = new LoggerRuntime();

System.err.println("Instrumenting");
// The Instrumenter creates a modified version of our test target class that contains additional probes for execution data recording
final Instrumenter instr = new Instrumenter(runtime);
final byte[] instrumented = instr.instrument( inputTarget );

final Instrumenter instr2 = new Instrumenter(runtime);
final byte[] instrumented2 = instr2.instrument( inputClass );

System.err.println("Startup");
// Now we're ready to run our instrumented class and need to startup the runtime first
runtime.startup();

System.err.println("Add definition");
// In this tutorial we use a special class loader to directly load the instrumented class definition from a byte[] instances
final MemoryClassLoader memoryClassLoader = new MemoryClassLoader();
memoryClassLoader.addDefinition(targetName, instrumented);
memoryClassLoader.addDefinition(className, instrumented2);
System.err.println("Loading Class: " + targetName);
final Class<?> targetClass = memoryClassLoader.loadClass(targetName);

System.err.println("Running JUnit");
// Here we execute our test target class through its Runnable interface:
JUnitCore junit = new JUnitCore();
Result result = junit.run(targetClass);
System.out.println(result.wasSuccessful());

System.err.println("Collecting");
// At the end of test execution we collect execution data and shutdown the runtime
final ExecutionDataStore executionData = new ExecutionDataStore();
runtime.collect(executionData, null, false);
runtime.shutdown();

System.err.println("Coverage");
// Together with the original class definition we can calculate coverage information
final CoverageBuilder coverageBuilder = new CoverageBuilder();
final Analyzer analyzer = new Analyzer(executionData, coverageBuilder);
inputTarget = new FileInputStream(path + targetName.replace('.', '/') + ".class");
analyzer.analyzeClass( inputTarget );

// Let's dump some metrics and line coverage information:
for (final IClassCoverage cc : coverageBuilder.getClasses())
{
	System.out.printf("Coverage of class %s%n", cc.getName());

	printCounter("instructions", cc.getInstructionCounter());
	printCounter("branches", cc.getBranchCounter());
	printCounter("lines", cc.getLineCounter());
	printCounter("methods", cc.getMethodCounter());
	printCounter("complexity", cc.getComplexityCounter());
}


This code instrument the two classes (functions.test.AddTest and functions.Calculadora), save byte[] of both classes, and run only the functions.test.AddTest (class that has JUnit tests).

I have two auxiliary private methods
public static class MemoryClassLoader extends ClassLoader
{
	private final Map<String, byte[]> definitions = new HashMap<String, byte[]>();

	/**
	 * Add a in-memory representation of a class.
	 */
	public void addDefinition(final String name, final byte[] bytes) {
		definitions.put(name, bytes);
	}

	@Override
	protected Class<?> loadClass(final String name, final boolean resolve) throws ClassNotFoundException
	{
		final byte[] bytes = definitions.get(name);
		if (bytes != null)
			return defineClass(name, bytes, 0, bytes.length);
		return super.loadClass(name, resolve);
	}
}

private void printCounter(final String unit, final ICounter counter)
{
	final Integer missed	= Integer.valueOf(counter.getMissedCount());
	final Integer total		= Integer.valueOf(counter.getTotalCount());
	
	System.out.printf("%s of %s %s missed%n", missed, total, unit);
}


If I run this example in a sample Java Project everything its ok, it do all stuffs and provide to me the coverage of JUnit test. But if I run this in a Eclipse Plug-In Project, my plugin "freeze" in line
final Class<?> targetClass = memoryClassLoader.loadClass(targetName);
it cannot load the Class the functions.test.AddTest... Sad

Do you have any idea why this happen? Rolling Eyes



--
Cheers,
Zé Carlos
Re: Run some JUnit tests and check coverage [Solve] [message #742908 is a reply to message #742290] Fri, 21 October 2011 00:22 Go to previous messageGo to next message
Zé  arlos is currently offline Zé arlosFriend
Messages: 15
Registered: October 2011
Junior Member
After a long day, I (with some help) found the solution for the problem... Very Happy

I need to run the above code into other Class and when I press the button for action 1 (for example) instantiate the other Class and run this code.


Cheers,
Zé Carlos
Re: Run some JUnit tests and check coverage [Solve] [message #782899 is a reply to message #742908] Tue, 24 January 2012 17:06 Go to previous messageGo to next message
Rui Gameiro is currently offline Rui GameiroFriend
Messages: 4
Registered: September 2011
Junior Member
Hi

how do you do that exactly?

Rui.
Re: Run some JUnit tests and check coverage [Solve] [message #782914 is a reply to message #782899] Tue, 24 January 2012 17:59 Go to previous messageGo to next message
Zé  arlos is currently offline Zé arlosFriend
Messages: 15
Registered: October 2011
Junior Member
Do you now JUnit plug-in for Eclipse? I need some like that...

I create a new Eclipse plug-in and the tasks for that are:

  1. Analyzing the open projects in workspace and find all JUnit classes;
  2. Execute every JUnit class and get the result (pass, fail, runtime, failure trace, etc)


You know how can I do that?


cumps Smile
Re: Run some JUnit tests and check coverage [Solve] [message #783178 is a reply to message #782914] Wed, 25 January 2012 08:30 Go to previous message
Rui Gameiro is currently offline Rui GameiroFriend
Messages: 4
Registered: September 2011
Junior Member
Hi,

I understand what you're trying to do.

I read the jaCoCo API to understand the code you insert above.

I create a simple java project and run the code without problems, befroe that i try to do wahat you say and create a eclipse plug-in with one button that run the code to instrument the classes in the runtime project, but as you say it fails loading.

I try to solve the problem as you say unsuccessfully.

it is possible you put the code you use to load the classes of runtime project to the plug-in.

thanks.

Rui.

[Updated on: Wed, 25 January 2012 09:27]

Report message to a moderator

Previous Topic:Export Deployable Features - Java Web Start Tab
Next Topic:Adding new markers
Goto Forum:
  


Current Time: Tue Jun 28 01:11:27 GMT 2022

Powered by FUDForum. Page generated in 0.02349 seconds
.:: Contact :: Home ::.

Powered by: FUDforum 3.0.2.
Copyright ©2001-2010 FUDforum Bulletin Board Software

Back to the top