Trouble referencing a text field in a GWT test case

[Dave Alvarado]

Hi,

I'm using GWT 2.4. I'm trying to construct a GWTTestCase to test an AJAX call on my GWT page. I have this handler defined in my onModuleLoad ...

	class GetHtmlHandler implements ClickHandler {
		/**
		 * Fired when the user clicks on the submitButton.
		 */
		public void onClick(ClickEvent event) {
			submitRequest();
		}

		/**
		 * Send the name from the nameField to the server and wait for a
		 * response.
		 */
		private void submitRequest() {
			final com.google.gwt.dom.client.Element submitButtonElement = Document.get().getElementById(SUBMIT_BUTTON_ID);
			final TextBox nameField = TextBox.wrap(DOM.getElementById(Productplus_gwt.NAME_FIELD_ID));
			
			// First, we validate the input.
			String docId = nameField.getText();

			// Then, we send the input to the server.
			submitButtonElement.setAttribute("enabled", Boolean.FALSE.toString());
			
			final Element contentDiv = DOM.getElementById(CONTENT_DIV_ID);
			
			productPlusService.getHtml(docId, new AsyncCallback<String>() {
				public void onFailure(Throwable caught) {
					submitButtonElement.setAttribute("enabled", Boolean.TRUE.toString());
					// Error! Show alert
					contentDiv.setInnerHTML("<span>Error: " + caught.getMessage() + "</span>");
				}

				public void onSuccess(String result) {
					submitButtonElement.setAttribute("enabled", Boolean.TRUE.toString());

					contentDiv.setInnerHTML(result);
					
					// Format tabs
					postHtmlProcessing();
				}
			});
		}
	}

Problem is when I run my GWT Test Case (through Eclipse), I get the Exception, "One or more exceptions caught, see full set in UmbrellaException#getCauses" complaining about the line

			final TextBox nameField = TextBox.wrap(DOM.getElementById(Productplus_gwt.NAME_FIELD_ID));

How am I supposed to set up my GWT Test case so that the line above doesn't die? Here's how I'm doing it now ...

public class GetHtmlTest extends GWTTestCase {

	public void gwtSetUp() {
		productPlusModule = new Productplus_gwt();

		// Create a panel to house a form and add the appropriate elements to it.
		final AbsolutePanel panel = new AbsolutePanel();
		submitButton = new Button();
		DOM.setElementAttribute(submitButton.getElement(), "id", Productplus_gwt.SUBMIT_BUTTON_ID);
		// Add a handler to send the name to the server
		Productplus_gwt.GetHtmlHandler handler = productPlusModule.new GetHtmlHandler();
		submitButton.addClickHandler(handler);
		
		nameField = new TextBox();
		DOM.setElementAttribute(nameField.getElement(), "id", Productplus_gwt.NAME_FIELD_ID);
		panel.add(nameField);
		panel.add(submitButton);
		// associate the form with the main panel
		final FormPanel form = new FormPanel();
		form.setWidget(panel);
		RootPanel.get().add(form);
		
		// Add a div with id="content" to the root panel.
		final AbsolutePanel contentPanel = new AbsolutePanel();
		DOM.setElementAttribute(contentPanel.getElement(), "id", Productplus_gwt.CONTENT_DIV_ID);
		RootPanel.get().add(contentPanel);
	}	// gwtSetUp


	public void testSuccessEvent() {	
		nameField.setText(VALID_ID);
		submitButton.click();

Thanks, - Dave


ps - Here's the complete exception stack trace ...

java.lang.RuntimeException: Remote test failed at 10.40.70.197 / Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.19) Gecko/2010031422 Firefox/3.0.19
	at com.google.gwt.junit.JUnitShell.processTestResult(JUnitShell.java:1288)
	at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1408)
	at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:1309)
	at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:653)
	at com.google.gwt.junit.client.GWTTestCase.runTest(GWTTestCase.java:441)
	at junit.framework.TestCase.runBare(TestCase.java:134)
	at junit.framework.TestResult$1.protect(TestResult.java:110)
	at junit.framework.TestResult.runProtected(TestResult.java:128)
	at junit.framework.TestResult.run(TestResult.java:113)
	at junit.framework.TestCase.run(TestCase.java:124)
	at com.google.gwt.junit.client.GWTTestCase.run(GWTTestCase.java:296)
	at junit.framework.TestSuite.runTest(TestSuite.java:232)
	at junit.framework.TestSuite.run(TestSuite.java:227)
	at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: com.google.gwt.event.shared.UmbrellaException: One or more exceptions caught, see full set in UmbrellaException#getCauses
	at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:129)
	at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)
	at com.google.gwt.event.dom.client.DomEvent.fireNativeEvent(DomEvent.java:116)
	at com.google.gwt.user.client.ui.Widget.onBrowserEvent(Widget.java:177)
	at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1351)
	at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1307)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:337)
	at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:218)
	at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
	at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
	at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:269)
	at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
	at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
	at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:213)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:337)
	at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:218)
	at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
	at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
	at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:289)
	at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:107)
	at com.google.gwt.dom.client.DOMImplMozilla.buttonClick(DOMImplMozilla.java)
	at com.google.gwt.dom.client.ButtonElement$.click$(ButtonElement.java:44)
	at com.google.gwt.user.client.ui.Button.click(Button.java:142)
	at com.myco.clearing.productplus.client.GetHtmlTest.testSuccessEvent(GetHtmlTest.java:64)
	at com.myco.clearing.productplus.client.__GetHtmlTest_unitTestImpl.doRunTest(__GetHtmlTest_unitTestImpl.java:7)
	at junit.framework.TestCase.runTest(TestCase.java:62)
	at com.google.gwt.junit.client.GWTTestCase.runBare(GWTTestCase.java:188)
	at com.google.gwt.junit.client.GWTTestCase.__doRunTest(GWTTestCase.java:129)
	at com.google.gwt.junit.client.impl.GWTRunner.runTest(GWTRunner.java:389)
	at com.google.gwt.junit.client.impl.GWTRunner.doRunTest(GWTRunner.java:318)
	at com.google.gwt.junit.client.impl.GWTRunner.access$9(GWTRunner.java:312)
	at com.google.gwt.junit.client.impl.GWTRunner$TestBlockListener.onSuccess(GWTRunner.java:107)
	at com.google.gwt.junit.client.impl.GWTRunner$InitialResponseListener.onSuccess(GWTRunner.java:63)
	at com.google.gwt.junit.client.impl.GWTRunner$InitialResponseListener.onSuccess(GWTRunner.java:1)
	at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:232)
	at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:287)
	at com.google.gwt.http.client.RequestBuilder$1.onReadyStateChange(RequestBuilder.java:395)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:337)
	at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:218)
	at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
	at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
	at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:269)
	at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
	at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
	at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:220)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
	at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
	at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
	at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:292)
	at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:546)
	at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.AssertionError: A widget that has an existing parent widget may not be added to the detach list
	at com.google.gwt.user.client.ui.RootPanel.detachOnWindowClose(RootPanel.java:136)
	at com.google.gwt.user.client.ui.TextBox.wrap(TextBox.java:69)
	at com.myco.clearing.productplus.client.Productplus_gwt$GetHtmlHandler.submitRequest(Productplus_gwt.java:97)
	at com.myco.clearing.productplus.client.Productplus_gwt$GetHtmlHandler.onClick(Productplus_gwt.java:88)
	at com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:54)
	at com.google.gwt.event.dom.client.ClickEvent.dispatch(ClickEvent.java:1)
	at com.google.gwt.event.shared.GwtEvent.dispatch(GwtEvent.java:1)
	at com.google.web.bindery.event.shared.EventBus.dispatchEvent(EventBus.java:40)
	at com.google.web.bindery.event.shared.SimpleEventBus.doFire(SimpleEventBus.java:193)
	at com.google.web.bindery.event.shared.SimpleEventBus.fireEvent(SimpleEventBus.java:88)
	at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:127)
	... 76 more