如何模拟 JestClient、elasticSearch

Question

我想模拟 jest 客户端，这样我就可以测试

@Override
public List<Person> findAll() {
    SearchResult result = null;
    SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
    searchSourceBuilder.query(QueryBuilders.matchAllQuery());
    Search search = new Search.Builder(searchSourceBuilder.toString()).addIndex(personIndexName)
            .addType(personTypeName).build();
    try {
        result = client.execute(search);
        if (!result.isSucceeded()) {
            return null;
        }

    } catch (IOException e) {
        logger.error("The search can't be completed " + e.getMessage());
    }
    List<SearchResult.Hit<Person, Void>> hits = result.getHits(Person.class);
    return hits.stream().map(this::getPerson).collect(Collectors.toList());
}

我想模拟 jest 以便它抛出 IOException 并进行一些其他测试，我试过这样模拟：

        when(mockJestClient.execute(search)).thenThrow(IOException.class);
    when(mockJestClient.execute(null)).thenThrow(IOException.class);

    elasticsearchPersonRepository = new ElasticsearchPersonRepository(mockJestClient);

没用，当我调用测试

  @Test(expected = IOException.class)
public void findAll() throws Exception {

    elasticsearchPersonRepository.findAll();

}

它抛出空指针异常而不是IOExcept。我究竟做错了什么？我如何模拟 JestClient？

Answer 1

您不应使用 'search' 或 'null'，而应使用特殊的 'any' 参数执行。如果是Mockito（其他mock框架也有类似的功能）

when(mockJestClient.execute(ArgumentMatchers.any(Search.class))).thenThrow(IOException.class);

如何模拟 JestClient、elasticSearch

How to mock JestClient, elasticSearch

java

unit-testing

exception

mocking

elasticsearch-jest