SDK升级后CI服务器上的Flutter测试错误

Question

正在将使用 Flutter SDK 2.0.6 的应用升级到 2.8.1。更新了所有测试，以便它们在英特尔 Macbook Pro 上本地通过。升级了我们的 CircleCI 服务器用来指向使用新 SDK 的 docker 镜像。 docker 文件如下所示：

FROM circleci/android:api-30

RUN sudo apt-get install -y locales
RUN sudo dpkg-reconfigure locales
RUN /usr/sbin/locale-gen C.UTF-8
ENV LANG='C.UTF-8' LC_ALL='C.UTF-8'

RUN curl https://storage.googleapis.com/flutter_infra_release/releases/stable/linux/flutter_linux_2.8.1-stable.tar.xz -o /tmp/flutter.tar.xz && \
  sudo tar -xvJ -C /opt -f /tmp/flutter.tar.xz && \
  sudo chown -R circleci:circleci /opt/flutter && \
  rm -f /tmp/flutter.tar.xz

ENV PATH="${PATH}:/opt/flutter/bin"

现在 CI 服务器上的一些单元测试失败并出现以下错误：

══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following SocketException was thrown running a test:
Connection failed (OS Error: No such file or directory, errno = 2), address =
/var/run/dbus/system_bus_socket, port = 0

When the exception was thrown, this was the stack:
#0      _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:681:35)

我对在 CI 服务器中运行 Flutter 有点不知所措。该错误是什么意思，我可以采取哪些步骤进行故障排除？

稍后在堆栈跟踪中它是ConnectivityLinux._startListenConnectivity (package:connectivity_plus_linux/src/connectivity.dart:61:20)

Answer 1

事实证明，我需要在测试中传入一个模拟的 connectionStream。