This is challenging because there is no network in a unit test and the AJAX call will fail.

这很有挑战性，因为单元测试中没有网络，AJAX调用会失败。

youdao

This is challenging because there is no network in a unit test and the AJAX call will fail.

这很有挑战性，因为单元测试中没有网络，AJAX调用会失败。

youdao