Bug 11863 Update Test Suite action does not allow to remove
What the action actually does is RECREATE the test suite based on the selection in the dialog. I do an update on a test suite which contains X. It is no clear that if I only select Y in the dialog that I'll end up with X being removed. Normally "Update" shows the content of the existing stuff (dir, zip) and allows to modify this. I think renaming the action (and the dialog) to Recreate Test Suite would solve the problem.
org.eclipse.jdt.junit/src/org/eclipse/jdt/junit/wizards/NewTestCaseCreationWizardPage.java
if (s.length() > 0)
			setTypeName(s + TEST_SUFFIX, true);
	}
	
	/*
	 * @see IDialogPage#createControl(Composite)
	 */
	public void createControl(Composite parent) {
		initializeDialogUnits(parent);
		
		Composite composite= new Composite(parent, SWT.NONE);
		
		int nColumns= 4;
		
		GridLayout layout= new GridLayout();
		layout.numColumns= nColumns;		
		composite.setLayout(layout);
		createContainerControls(composite, nColumns);	
		createPackageControls(composite, nColumns);		
		createSeparator(composite, nColumns);
		createTestClassControls(composite, nColumns);		
		createClassToTestControls(composite, nColumns);
		createSuperClassControls(composite, nColumns);
		createMethodStubSelectionControls(composite, nColumns);
		setSuperClass(JUnitPlugin.TEST_SUPERCLASS_NAME, true);
		
		setControl(composite);
			
		
		fClassToTestText.setText(fDefaultClassToTest);