orgeclipsecontributionjunit/ITestRunListener in Java

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orgeclipsecontributionjunit/ITestRunListener
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public interface ITestRunListener { void testsStarted( IJavaProject project, int testCount); void testsFinished(IJavaProject project); void testStarted( IJavaProject project, String klass, String methodName); void testFailed( IJavaProject project, String klass, String method, String trace); } Now we can move on to MarkerCreator
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163 Creating Markers
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Which object should be responsible for creating the markers None of the existing objects make much sense JUnitPlugin is already busy broadcasting test progress The TestRunner is handling socket communications We need aMarkerCreator for a given project, an object that listens for test progress and creates markers:
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orgeclipsecontributionjunit/JUnitPlugin
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public void run(IType[] classes, IJavaProject project) throws CoreException {
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ITestRunListener listener= new MarkerCreator(project); addTestListener(listener);
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try { new TestRunner(project)run(classes); } finally {
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removeTestListener(listener);
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} } MarkerCreator needs to implement ITestRunListener It keeps its project in a field:
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orgeclipsecontributionjunit/MarkerCreator
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public class MarkerCreator implements ITestRunListener { private IJavaProject project; public MarkerCreator(IJavaProject project) { thisproject= project; } } The first ITestRunListener method we need to implement is testFailed(), where we will create a marker:
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orgeclipsecontributionjunit/MarkerCreator
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public void testFailed(IJavaProject testProject, String klass, String method, String trace) { if (! projectequals(testProject)) return; IType type= null; try { type= projectfindType(klass); } catch (JavaModelException e) { // Fall through } if (type == null) return; //TODO: Log later try { IResource resource= typegetUnderlyingResource(); IMarker marker= resourcecreateMarker(
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"orgeclipsecontributionjunitfailure"); IMethod testMethod= typegetMethod(method, new String[0]); setMarkerAttributes(marker, testMethod, trace); } catch (CoreException e) { // TODO Log later } } We'll explain the utility method setMarkerAttributes() in a moment We defined theITestRunListener API in terms of Strings, not JavaElements For remote communication, Strings make sense Inside Eclipse, however, we'd like to communicate Java elements The question is, where do we do the mapping from Strings to Java elements As long as the only purpose we had for the broadcast information was to display it in the user interface, there was no cost to using strings Now that we want to further process the test progress information inside of Eclipse, though, it's starting to seem like the ITestRunListener should communicate JavaElements instead of Strings The flow of this test is to map from the string representation of the class back to the IType From the type we can fetch theResource (a file) to which we attach a marker of the appropriate type JavaElements give you a Java-specific view of the resources You can navigate to the underlying resource by calling getUnderlyingResource() Now we have all the information we need to set the attributes of the marker Our test relied on a helper method We mimic the marker attribute setting code from our original example:
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orgeclipsecontributionjunit/MarkerCreator
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private void setMarkerAttributes(IMarker marker, IMethod testMethod, String trace) throws JavaModelException, CoreException { ISourceRange range= testMethodgetSourceRange(); Map map= new HashMap(4); mapput(IMarkerCHAR_START, new Integer(rangegetOffset())); mapput(IMarkerCHAR_END, new Integer(rangegetOffset() + rangegetLength())); mapput(IMarkerSEVERITY, new Integer(IMarkerSEVERITY_ERROR)); mapput(IMarkerMESSAGE, extractMessage(trace)); mapput("trace", trace); markersetAttributes(map); } Instead of having the source range of the marker passed explicitly, we derive the source range from the range of the test method We introduce a helper extractMessage() to shorten the failure trace to a one line message For completeness here is the code:
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orgeclipsecontributionjunit/MarkerCreator
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private String extractMessage(String trace) { String filteredTrace= BaseTestRunnergetFilteredTrace(trace); BufferedReader br= new BufferedReader( new StringReader(filteredTrace)); String line, message= trace; try { if ((line= brreadLine()) != null) { message= line; if ((line= brreadLine()) != null) message+= " - "+line; } return messagereplace('\t', ' '); } catch (Exception IOException) { } return message; }
The IMarkerMESSAGE attribute is used to show the marker in the task list and when hovering over an error in the editor In addition, we store the full trace in a separate "trace" attribute of the marker so that we do not loose this information The test still fails the assertion about our marker being a subtype of orgeclipsejdtcoreproblem Notice how the test declares the intent of our marker:
assertTrue(markerisSubtypeOf( IJavaModelMarkerJAVA_MODEL_PROBLEM_MARKER)); Passing this assertion requires that we declare our marker type in the manifest Orgeclipsecoreresourcesmarkers is the extension point for declaring marker types and their attributes: