Github user bodewig commented on a diff in the pull request:
https://github.com/apache/ant/pull/60#discussion_r169243988
--- Diff:
src/main/org/apache/tools/ant/taskdefs/optional/junitlauncher/JUnitLauncherTask.java
---
@@ -0,0 +1,508 @@
+package org.apache.tools.ant.taskdefs.optional.junitlauncher;
+
+import org.apache.tools.ant.AntClassLoader;
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.Task;
+import org.apache.tools.ant.types.Path;
+import org.apache.tools.ant.util.KeepAliveOutputStream;
+import org.junit.platform.launcher.Launcher;
+import org.junit.platform.launcher.LauncherDiscoveryRequest;
+import org.junit.platform.launcher.TestExecutionListener;
+import org.junit.platform.launcher.TestPlan;
+import org.junit.platform.launcher.core.LauncherFactory;
+import org.junit.platform.launcher.listeners.SummaryGeneratingListener;
+import org.junit.platform.launcher.listeners.TestExecutionSummary;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PipedInputStream;
+import java.io.PipedOutputStream;
+import java.io.PrintStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * An Ant {@link Task} responsible for launching the JUnit platform for
running tests.
+ * This requires a minimum of JUnit 5, since that's the version in which
the JUnit platform launcher
+ * APIs were introduced.
+ * <p>
+ * This task in itself doesn't run the JUnit tests, instead the sole
responsibility of
+ * this task is to setup the JUnit platform launcher, build requests,
launch those requests and then parse the
+ * result of the execution to present in a way that's been configured on
this Ant task.
+ * </p>
+ * <p>
+ * Furthermore, this task allows users control over which classes to
select for passing on to the JUnit 5
+ * platform for test execution. It however, is solely the JUnit 5
platform, backed by test engines that
+ * decide and execute the tests.
+ *
+ * @see <a href="https://junit.org/junit5/";>JUnit 5 documentation</a> for
more details
+ * on how JUnit manages the platform and the test engines.
+ */
+public class JUnitLauncherTask extends Task {
+
+ private Path classPath;
+ private boolean haltOnFailure;
+ private String failureProperty;
+ private final List<TestDefinition> tests = new ArrayList<>();
+ private final List<ListenerDefinition> listeners = new ArrayList<>();
+
+ public JUnitLauncherTask() {
+ }
+
+ @Override
+ public void execute() throws BuildException {
+ final ClassLoader previousClassLoader =
Thread.currentThread().getContextClassLoader();
+ try {
+ final ClassLoader executionCL =
createClassLoaderForTestExecution();
+ Thread.currentThread().setContextClassLoader(executionCL);
+ final Launcher launcher = LauncherFactory.create();
+ final List<TestRequest> requests = buildTestRequests();
+ for (final TestRequest testRequest : requests) {
+ try {
+ final TestDefinition test = testRequest.getOwner();
+ final LauncherDiscoveryRequest request =
testRequest.getDiscoveryRequest().build();
+ final List<TestExecutionListener>
testExecutionListeners = new ArrayList<>();
+ // a listener that we always put at the front of list
of listeners
+ // for this request.
+ final Listener firstListener = new Listener();
+ // we always enroll the summary generating listener,
to the request, so that we
+ // get to use some of the details of the summary for
our further decision making
+ testExecutionListeners.add(firstListener);
+
testExecutionListeners.addAll(getListeners(testRequest, executionCL));
+ final PrintStream originalSysOut = System.out;
+ final PrintStream originalSysErr = System.err;
+ try {
+ firstListener.switchedSysOutHandle =
trySwitchSysOut(testRequest);
+ firstListener.switchedSysErrHandle =
trySwitchSysErr(testRequest);
+ launcher.execute(request,
testExecutionListeners.toArray(new
TestExecutionListener[testExecutionListeners.size()]));
+ } finally {
+ // switch back sysout/syserr to the original
+ try {
+ System.setOut(originalSysOut);
+ } catch (Exception e) {
+ // ignore
+ }
+ try {
+ System.setErr(originalSysErr);
+ } catch (Exception e) {
+ // ignore
+ }
+ }
+ handleTestExecutionCompletion(test,
firstListener.getSummary());
+ } finally {
+ try {
+ testRequest.close();
+ } catch (Exception e) {
+ // log and move on
+ log("Failed to cleanly close test request", e,
Project.MSG_DEBUG);
+ }
+ }
+ }
+ } finally {
+
Thread.currentThread().setContextClassLoader(previousClassLoader);
+ }
+ }
+
+ /**
+ * @return Creates and returns the a {@link Path} which will be used
as the classpath of this
+ * task. This classpath will then be used for execution of the tests
+ */
+ public Path createClassPath() {
+ this.classPath = new Path(getProject());
--- End diff --
if users specify multiple nested classpath elements, only the last one will
be used. You may want to return an already created `this.classpath` or move on
to an `add` method and collect the paths inside of a wrapper `Path`.
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