单元测试的问题是同一个集合在流和for循环中的处理方式不同。两种情况下的集合都是空的(data.size() = 0)，但在第一种情况下，该集合以某种方式进行了处理，换句话说，它将进入for循环。在第二种情况下，该集合被跳过（这是意料之中的，因为它是空的）。
测试使用Mockito，Result<Record>将用于JOOQ。
测试是旧的，没有变化，唯一的变化是从for循环到流。

案例1

private SearchResult iterateData(
      Result<Record> data, ...) {

      for (Record record : data) {
           doSomething(record);
    }

案例2

private SearchResult iterateData(
      Result<Record> data, ...) {
      data.stream().forEach(record -> doSomething(record));

案例1 for loop example截图

模拟的结果对象

private DefaultSearchRequestModel rowSpecificValuesTestSetup(
      parameters...) {

    DefaultSearchRequestModel searchRequest = new DefaultSearchRequestModel(
        Arrays.asList(....),
        Collections.singletonList(
            new SearchFilter(
                "test",
                Collections.singletonList(...)));

    List<Column> columns =
        this.searchService.filterUserAllowedColumns(...);

    Condition searchCondition =
        this.searchRepositoryMock.getSearchConditions(...);

    List<TableJoinMapping> joinMappings = ColumnHelper.getColumnTranslateDeviceJoinMappings(
        columns,
        searchRequest.getFilters());

    Result<Record> deviceDataResultMock = Mockito.mock(Result.class);
    Iterator<Record> resultIterator = Mockito.mock(Iterator.class);
    final Table fromTableMock = Mockito.mock(Table.class);
    when(resultIterator.hasNext()).thenReturn(true, false);
    Record recordMock = Mockito.mock(Record.class);
    when(resultIterator.next()).thenReturn(recordMock);
    when(deviceDataResultMock.iterator()).thenReturn(resultIterator);
    when(recordMock.get(CONTRACTID)).thenReturn(contractId);
   ...
when(this.userPermissions.getAccessPermissions()).thenReturn(searchRequest.getColumns().stream().map
        (name -> Column.findByName(name).getId()).collect(
        Collectors.toList()));
    when(this.searchRepositoryMock.getCurrentTable(companyId))
        .thenReturn(fromTableMock);
    when(recordMock.get(TYPEID)).thenReturn(financialTypeId);
    when(this.searchRepositoryMock.getDeviceData(
        ArgumentMatchers.anyList(),
        ArgumentMatchers.anyList(),
        any(),
        any(),
        eq(searchRequest.getPageSize()),
        eq(searchRequest.getPage()),
        eq(searchRequest.getSortCriterias()),
        eq(fromTableMock),
        ArgumentMatchers.anyList(),
        eq(Optional.empty()),
        eq(this.dslContextMock)))
        .thenReturn(deviceDataResultMock);

    return searchRequest;
  }```