Question about Unit Testing

Hi there,

Thanks so much for providing this demo app. I have a question about writing unit tests when using layers. When running pytest locally, `import` errors occur when my lambda function references a library or dependency contained in a layer. What is the workaround for this limitation?

Best,

Brianna

首先，在引用 layer 中所包含依赖项的 Lambda 函数中重现 pytest 导入失败。记录一种受支持的解决方法，并说明如何在本地验证该依赖项能够在 pytest 下成功导入。

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