JUnit的代碼覆蓋率

Question

我正在為一個方法編寫一個JUnit測試用例，我也試圖獲得代碼覆蓋率。 我現有的測試應涵蓋該場景，但由於某種原因，它在cobertura報告中仍顯示為紅色。

要測試的方法。

public <T extends BaseServiceResponse> T postProcess(T response,
        ClientResponse clientResponse) throws EISClientException {  

    List<Message> messages = response.getMessages();
    if(messages==null || messages.size()==0) {
        return response;
    }

    Map<String, Message> messagesMap = populateMessages(response.getMessages());
    ConditionOperator condition = getCondition();

    switch(condition) {
        case OR:
            checkORCondition( messagesMap );
            break;
        case AND:
            checkANDCondition( messagesMap );
            break;
    }       
    return response;
}   

JUnit測試用例：

@Test
public void testPostProcess() throws Exception {
    clientResponse = mock(ClientResponse.class);
    RetrieveBillingServiceResponse response = new RetrieveBillingServiceResponse();

    // Testing OR condition (200 status code)
    MessageToExceptionPostProcessFilter postProcessFilter = new MessageToExceptionPostProcessFilter();
    postProcessFilter.setCondition(ConditionOperator.OR);

    Message message = new Message();
    message.setMessageCode("200");
    message.setMessageType(MessageTypeEnum.MESSAGE_TYPE_INFO);
    message.setMessageText("Service completed successfully");

    response.setMessages(Arrays.asList(message));

    RetrieveBillingServiceResponse serviceResponse = postProcessFilter.postProcess(response, clientResponse);

    assertNotNull(serviceResponse.getMessages());
    assertEquals(1, serviceResponse.getMessages().size());
    assertTrue(serviceResponse instanceof RetrieveBillingServiceResponse);
    assertFalse(serviceResponse.getMessages().isEmpty());
    assertEquals("200", serviceResponse.getMessages().get(0).getMessageCode());
    assertEquals("Service completed successfully", serviceResponse.getMessages().get(0).getMessageText());
    assertEquals(MessageTypeEnum.MESSAGE_TYPE_INFO, serviceResponse.getMessages().get(0).getMessageType());     

    // Testing OR condition (404 status code)
    message.setMessageCode("404");
    message.setMessageText("request not found");
    message.setMessageType(MessageTypeEnum.MESSAGE_TYPE_INFO);

    response.setMessages(Arrays.asList(message));
    serviceResponse = postProcessFilter.postProcess(response, clientResponse);

    assertNotNull(serviceResponse.getMessages());
    assertFalse(serviceResponse.getMessages().isEmpty());
    assertEquals(1, serviceResponse.getMessages().size());
    assertEquals("404", serviceResponse.getMessages().get(0).getMessageCode());
    assertEquals("request not found", serviceResponse.getMessages().get(0).getMessageText());
    assertEquals(MessageTypeEnum.MESSAGE_TYPE_INFO, serviceResponse.getMessages().get(0).getMessageType());     

    /**
     * Testing AND condition
     * Catching EISClientException
     */
    boolean caughtException = false;
    try {
        postProcessFilter.setCondition(ConditionOperator.AND);

        List<String> myMessages = new ArrayList<String>();
        myMessages.add("200");
        myMessages.add("400");

        serviceResponse = postProcessFilter.postProcess(response, clientResponse);

        assertNotNull(serviceResponse.getMessages());
        assertEquals("400", postProcessFilter.getMessageCodes());

    } catch (EISClientException ex) {
        caughtException = true;
        assertEquals("All of the specified message codes matched returned errors.", ex.getMessage());
    }
    assertTrue(caughtException);

    // Null messages
    postProcessFilter.setCondition(ConditionOperator.OR);

    List<Message> myList = new ArrayList<Message>();
    message.setMessageCode(null);

    serviceResponse = postProcessFilter.postProcess(response, clientResponse);

    assertEquals(0, myList.size());
    assertEquals(null, serviceResponse.getMessages().get(0).getMessageCode());
}   

我無法涵蓋消息的if語句== null || message.size == 0

任何幫助將不勝感激。 對於消息不為null的情況，這應該很簡單，而我現有的代碼應該已經覆蓋了它，但是我不確定自己做錯了什么？

謝謝

Answer 1

優素福，

為了進入該代碼塊，您至少需要or語句中的其中一個條件為true； 因此，讓我們檢查兩個條件。

首先，傳遞給postProcess()方法的響應對象始終具有消息列表，這就是為什么不滿足第一個條件messages == null原因。

其次，您的消息列表不為空（您已經在測試中添加了消息，但從未清除過它們），因此第二個條件messages.size() == 0不滿足。

修復：如果您從響應中清除所有消息，例如使用response.setMessages(null) ，則它將進入該if塊，並且代碼覆蓋范圍將識別出它。