René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"'....PackageFragment cannot be cast to org.eclipse.jdt.core.IType' error when running 'net.sf.j2s.test.junit' as Java2Script Unit Test ","articleBody":"Steps to reproduce\r\n==============\r\n\r\nIn Eclipse Package Explorer:\r\n- Right-Click package 'net.sf.j2s.test.junit'\r\n- Select 'Run As \u003e Java2Script Unit Test'\r\n\r\nA 'Problem occured' dialog appears with the message:\r\n\u003e 'Launching net.sf.j2s.test.junit' has encountered a problem\r\n\u003e\r\n\u003e An internal error occurred during: \"Launching net.sf.j2s.test.junit\".\r\norg.eclipse.jdt.internal.core.PackageFragment cannot be cast to org.eclipse.jdt.core.IType\r\n\r\nThe error log contains this entry:\r\n\u003e  !MESSAGE An internal error occurred during: \"Launching net.sf.j2s.test.junit\".\r\n\u003e  !STACK 0\r\n\u003e  java.lang.ClassCastException: org.eclipse.jdt.internal.core.PackageFragment cannot be cast to org.eclipse.jdt.core.IType\r\n\u003e\tat net.sf.j2s.ui.launching.J2SLaunchingUtil.launchingJ2SUnit(J2SLaunchingUtil.java:149)\r\n\u003e\tat net.sf.j2s.ui.launching.J2SUnitConfigurationDelegate.launch(J2SUnitConfigurationDelegate.java:21)\r\n\u003e\tat org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:885)\r\n\u003e\tat org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:739)\r\n\u003e\tat org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1039)\r\n\u003e\tat org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1256)\r\n\u003e\tat org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)\r\n\r\n(Running individual test classes works fine)","author":{"url":"https://github.com/abego","@type":"Person","name":"abego"},"datePublished":"2017-06-28T08:29:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/16/java2script/issues/16"}