java - 模拟一个具有一些由随机值生成的字段的类？

Question

我想知道如何进行这个测试!下面是测试方法: 可以看到correlationId和docFamilyUUid是由UUID类随机生成的。基本上，getDocInfo 首先在mockDao 上调用findAllByDocId，如果返回null，它将创建一个要保存到数据库的docInfo 对象。

void testGetDocInfo()
    {
        def String docId = 'I19292800fe1911e0a849005056932b99'
        def List<DocInfo> expectedResult = [expectedDocInfo]
        expect(mockDocInfoDao.findAllByDocId(docId)).andReturn(null)
        mockDocInfoDao.save(new DocInfo())
        replay(mockDocInfoDao)
        docInfoServiceImpl.getDocInfo(docId)
        verify(mockDocInfoDao)
    }

/////////DocInfoServiceClass

 public final DocInfo createDocInfo(final String docId)
    {
        final DocInfo docInfo = new DocInfo();
        docInfo.setId(docId);
        docInfo.setDocFamilyUuid(UUIDGenerator.getInstance().getUuidAsString());
        docInfo.setCorrelationId(UUIDGenerator.getInstance().getUuidAsString());
        return docInfo;
    }
    /**
     * @param docId is the document Id
     * @return the list of DocInfo objects for a particular docId
     */
    public final List<DocInfo> findAllByDocId(final String docId)
    {
        return docInfoDao.findAllByDocId(docId);
    }

    /**
     * @param docId is the document Id
     * @return the list of DocInfo objects for a particular docId
     */
    public final List<DocInfo> getDocInfo(final String docId)
    {
        List<DocInfo> docInfoList = null;
        docInfoList = docInfoDao.findAllByDocId(docId);
        if (docInfoList == null)
        {
            docInfoList = new ArrayList<DocInfo>();
            DocInfo docInfo = createDocInfo(docId);
            docInfoDao.save(docInfo);
            docInfoList.add(docInfo);
        }

        return docInfoList;
    }

Answer 1

您应该使用部分模拟来仅模拟 createDocInfo 方法。这样您就可以从那里返回您想要的任何内容，特别是带有您选择的 id 的 DocInfo 实例。这样您就可以对 getDocInfo 的行为做出必要的断言(例如确保传递具有相同 id 的实例来保存和添加)。

您可以阅读有关部分模拟的内容 here 。您没有说明您正在使用哪个版本的 EasyMock，所以我假设它不是太旧。