public void testSourceProvider() throws Exception {
IWorkbenchWindow window = openTestWindow();
IEvaluationService service = (IEvaluationService) window.getService(IEvaluationService.class);
assertNotNull(service);
MyEval listener = new MyEval();
UserExpression expression = new UserExpression("Paul");
IEvaluationReference ref =
service.addEvaluationListener(expression, listener, IEvaluationService.RESULT);
assertEquals(ISources.ACTIVE_CONTEXT << 1, ref.getSourcePriority());
assertFalse(listener.currentValue);
assertEquals(1, listener.count);
ISourceProviderService sps =
(ISourceProviderService) window.getService(ISourceProviderService.class);
ActiveUserSourceProvider userProvider =
(ActiveUserSourceProvider) sps.getSourceProvider("username");
userProvider.setUsername("John");
assertFalse(listener.currentValue);
assertEquals(1, listener.count);
userProvider.setUsername("Paul");
assertTrue(listener.currentValue);
assertEquals(2, listener.count);
userProvider.setUsername("guest");
assertFalse(listener.currentValue);
assertEquals(3, listener.count);
}
