单元测试的问题是相同的集合在流和for循环中被不同的处理。这两种情况下的集合都是空的 (data.size() = 0) ，但在例1中，集合是以某种方式处理的，换句话说，它将执行for-循环。在第2种情况下，该集合被跳过(因为它是空的)。

测试使用的是Mockito，而 Result<Record> 正在开始使用JOOQ。

测试是旧的，不变的，唯一的改变是从一个循环到另一个流。

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 循环示例 的屏幕截图

模拟结果对象

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)))