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
protected final static String PAGE_NAME= "NewTestCaseCreationWizardPage"; 
	protected final static String CLASS_TO_TEST= PAGE_NAME + ".classtotest"; 
	protected final static String TEST_CLASS= PAGE_NAME + ".testclass"; 
	protected final static String TEST_SUFFIX= "Test"; 
	protected final static String SETUP= "setUp"; 
	protected final static String TEARDOWN= "tearDown"; 
	
	private String fDefaultClassToTest;
	private NewTestCaseCreationWizardPage2 fPage2;
	private SelectionButtonGroup fMethodStubsButtons;
	private IType fClassToTest;
	protected IStatus fClassToTestStatus;
	protected IStatus fTestClassStatus;
	private int fIndexOfFirstTestMethod;
	private Label fClassToTestLabel;