Issue with mocking pageContext using jmock when pageContext is neither a filed of the class nor passed a method parameter

public int doStartTag() throws JspException { pageContext.removeAttribute(TEMPLATE_PATH); SlingHttpServletRequest request = (SlingHttpServletRequest) pageContext.getRequest();

    LOGGER.info("The view type passed from front end corresponding to which template "
            + "path is to be fetched is " + getView());

    ComponentViewAndViewHelperCacheImpl componentViewAndViewHelperCacheImpl = new ComponentViewAndViewHelperCacheImpl();

    String templatePath = "";

    view = getView();

    String resourcePath = WCMUtils.getComponent(request.getResource()).getResourceType();

   }

How to do i write unit test case for above code using jmock , here pageContext is not a field of this class and it is not passed as parameter of the method, so i can not use setField() method to set value for pageContext neither i can pass pageContext as parameter so it gives null pointer exception when i try to write unit test case for this method at the line

pageContext.removeAttribute(TEMPLATE_PATH);

Any Help will be appreciated.