我们如何在 JUnit 中模拟会话值 (request.getSession())？

private BankApp processSelection(HttpServletRequest request,
        String[] facets, String selectedText) {
    DebugUtility.debug(LOG, "Enter into JiraController :: processDashBoardPortFolioSelection()");
    BankApp project = new BankApp();
    List<BankApp> dataAgg = (List<BankApp>) request.getSession()
            .getAttribute(PROJECT_WISE_SESSION);
    if (CollectionUtils.isNotEmpty(dataAgg)) {
        List<BankApp> projects = new ArrayList<>();
        for (String currentProjectId : facets) {
            Project currProject = vendorUtils.getProjectDetails(currentProjectId);
            List<SourceProjectAssocation> sourceSystem = currProject.getSourceSytems("JIRA");
            List<String> jiraProjects = new ArrayList<>();
            sourceSystem.stream().forEach(s -> jiraProjects.add(s.getAssociatedJiraProject()));
            for (BankApp projectData : dataAgg) {
                if (jiraProjects.contains(projectData.getProjectKey())) {
                    projects.add(projectData);
                }
            }
        }
        project = processAllProjectsData(projects);
        project.setProjectKey(selectedText);
        project.setProjectsCount(projects.size());
    }
    DebugUtility.debug(LOG, "project in processDashBoardPortFolioSelection :: " + project);
    DebugUtility.debug(LOG, "Exit from JiraController :: processDashBoardPortFolioSelection()");
    return project;
}

我们如何为这个方法编写junit测试用例？我在这里面临的挑战是我们需要嘲笑request.getSession().getAttribute(PROJECT_WISE_SESSION)。所以我尝试了when(request.getSession()).thenReturn(session);但与request.getSession()我越来越null.

尝试类似的事情

@Test
public void test() {
    HttpServletRequest requestMock = Mockito.mock(HttpServletRequest.class);
    HttpSession sessionMock = Mockito.mock(HttpServletRequest.class);
    Mockito.when(requestMock.getSession()).thenReturn(sessionMock);

    processSelection(requestMock, <and your facets and selectedText here>)

    //do some asserts/verifies here
}