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gwtmockito and GXT #74
Description
Hello,
I'm trying to build unit tests about widget who uses GWT 2.7.0 and GXT 3.1.4 components. Unfortunately as soon as test encounter a GXT component it raises a NullPointerException. Here is my dummy widget:
public class SomePanel {
private HorizontalPanel pnl;
private Button btn;
private Label lbl;
private TextButton displaySome;
public SomePanel() {
pnl = new HorizontalPanel();
btn = new Button("Hey");
lbl = new Label("Unclicked");
btn.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
if ("Unclicked".equals(lbl.getText())) {
lbl.setText("Clicked");
} else {
lbl.setText("Unclicked");
}
}
});
displaySome = new TextButton("Display some.");
}
public HorizontalPanel getPnl() {
return pnl;
}
public Button getBtn() {
return btn;
}
public Label getLbl() {
return lbl;
}
public TextButton getDisplaySome() {
return displaySome;
}
}
And this is the test who goes wrong:
@RunWith(GwtMockitoTestRunner.class)
public class SomePanelTest {
private SomePanel pnl;
@Test
public void checkLabels() {
pnl = new SomePanel();
Assert.assertEquals("Unclicked", pnl.getLbl().getText());
pnl.getBtn().click();
Assert.assertEquals("Clicked", pnl.getLbl().getText());
pnl.getBtn().click();
Assert.assertEquals("Unclicked", pnl.getLbl().getText());
Assert.assertEquals("Display", pnl.getDisplaySome().getText());
}
}
This is the exception:
java.lang.NullPointerException
at com.sencha.gxt.core.client.resources.CommonStyles.get(CommonStyles.java:96)
at com.sencha.gxt.widget.core.client.cell.CellComponent.createDefaultWrapperElement(CellComponent.java:55)
at com.sencha.gxt.widget.core.client.cell.CellComponent.<init>(CellComponent.java:141)
at com.sencha.gxt.widget.core.client.button.CellButtonBase.<init>(CellButtonBase.java:44)
at com.sencha.gxt.widget.core.client.button.TextButton.<init>(TextButton.java:35)
at com.sencha.gxt.widget.core.client.button.TextButton.<init>(TextButton.java:25)
at edu.me.gwt.client.SomePanel.<init>(SomePanel.java:32)
...
I would like to know if gwtmockito is the right tool to use together GXT (I am bound to GXT 3.1.4) and if it is, what am I missing then. TIA.
Activity
ekuefler commentedon Jun 17, 2018
Most likely this means that there's a class inside GXT somewhere that's relying on a native method. Could you try annotating your test with either
@WithClassesToStub(TextButton.class)or@WithClassesToSub(CommonStyle.class)and see if that helps? More details at https://static.javadoc.io/com.google.gwt.gwtmockito/gwtmockito/1.1.8/com/google/gwtmockito/WithClassesToStub.html.