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SWTBot Test throws WidgetNotFoundException only when run with Maven [message #1701199]

Thu, 09 July 2015 19:20

Robert Smith

Messages: 1
Registered: July 2015

Junior Member

I have written a SWTBot test for an Eclipse RCP application which opens Eclipse and then opens a view. When run as an SWTBot test, it runs correctly and passes. However, when run in the project's Maven build using Tycho, it fails with the following error message:

org.eclipse.swtbot.swt.finder.exceptions.WidgetNotFoundException: The widget was null.
	at org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBot.<init>(AbstractSWTBot.java:104)
	at org.eclipse.swtbot.swt.finder.widgets.AbstractSWTBotControl.<init>(AbstractSWTBotControl.java:47)
	at org.eclipse.swtbot.swt.finder.widgets.SWTBotShell.<init>(SWTBotShell.java:49)
	at org.eclipse.swtbot.swt.finder.widgets.SWTBotShell.<init>(SWTBotShell.java:38)
	at org.eclipse.swtbot.swt.finder.SWTBotFactory.activeShell(SWTBotFactory.java:376)
	at org.eclipse.swtbot.swt.finder.SWTBotFactory.menu(SWTBotFactory.java:210)
	at org.eclipse.swtbot.swt.finder.SWTBotFactory.menu(SWTBotFactory.java:200)
	at org.eclipse.ice.viz.service.test.PlotEditorTester.checkPlotEditorFileAssociation(PlotEditorTester.java:143)

The line it fails on is:

bot.menu("Window").menu("Show View").menu("Project Explorer").click();

Specifically, it can't find the "Window" menu. It apparently isn't getting an Eclipse window. I have tried explicitly opening a workbench window like so, but it did not change the error:

		UIThreadRunnable.syncExec(new VoidResult() {
			  public void run() {
			    PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell().forceActive();
			  }
			});

The test bundle's pom.xml file includes this:

	<build>
		<plugins>
			<!-- Configure the build to handle SWTBot -->
			<plugin>
				<groupId>org.eclipse.tycho</groupId>
				<artifactId>tycho-surefire-plugin</artifactId>
				<version>${tycho-version}</version>
				<configuration>
					<useUIHarness>true</useUIHarness>
					<useUIThread>false</useUIThread>
					<product>org.eclipse.sdk.ide</product>
					<application>org.eclipse.ui.ide.workbench</application>
				</configuration>
			</plugin>
		</plugins>
	</build>

What am I doing wrong and how do I fix it?

Edit: I found the problem. I needed to add the following dependency to my pom.xml file, inside the <configuraiton> node.

					<dependencies>
						<dependency>
							<type>p2-installable-unit</type>
							<artifactId>org.eclipse.sdk.feature.group</artifactId>
						</dependency>
					</dependencies>

With that, Maven opens an Eclipse instance to run the test in, allowing it to succeed.

[Updated on: Fri, 10 July 2015 17:24]

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