Creating an EL expression in a Seam unit test

[trappa]

I need to write a unit test that creates a list of FilterField.

private List<FilterField> createSampleFilters() {
  List<FilterField> filters = new ArrayList<FilterField>();
  ExtendedFilterField filtre = 
    new ExtendedFilterField(
      getExpression("#{user.username}"),"j"); 
  
  filters.add(filtre);
  return filters;
}

private Expression getExpression(String exp) {
  ELContext context = 
              FacesContext.getCurrentInstance().getELContext();

  return ExpressionFactory.newInstance().
           createValueExpression(context, exp, String.class);
}

MY PROBLEM is that FacesContext.getCurrentInstance() throws a NullPointerException !

I tried to create a FacesContext instance with MockFacesContextFactory but it doesn't work either :-/

Does anyone have a clue to create a FilterField or a javax.el.Expression or a non null facesContext in a seam unit test ???

[germanescobar]

If you are using ComponentTest, FacesRequest or NonFacesRequest for your test, you can call the getValue() method to evaluate an EL expression. For example:

...
new ComponentTest() {
  @Override
  protected void testComponents() throws Exception {
    User user =  (User) getValue("#{user}");
    ...
  }
}.run();
...

If you don't know what I'm talking about, I'd suggest you take a look at the documentation first.

[trappa]

Sorry, but I am not trying to evaluate an EL expression! I want to create a javax.el.Expression object in a seam unit test (and not an integration test)

Actually, I am trying to create an ExtendedFilterField with this constructor

ExtendedFilterField(javax.el.Expression expression, java.lang.String filterValue) 

can anyone help ???