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The AppTest class

Initialize a simulated app using AppTest

Run an AppTest script

Get AppTest script elements

The main value of AppTest is providing an API to programmatically inspect and interact with the elements and widgets produced by a running Streamlit app. Using the AppTest.<element type> properties or AppTest.get() method returns a collection of all the elements or widgets of the specified type that would have been displayed by running the app.

Note that you can also retrieve elements within a specific container in the same way - first retrieve the container, then retrieve the elements just in that container.