Testing file uploads in Flask

Question

I\'m using Flask-Testing for my Flask integration tests. I\'ve got a form that has a file upload for a logo that I\'m trying to write tests for but I keep getting an error sayin

Answer 1

You need two things:

1.) content_type='multipart/form-data' in your .post()
2.) in your data= pass in file=(BytesIO(b'my file contents'), "file_name.jpg")

A full example:

    data = dict(
        file=(BytesIO(b'my file contents'), "work_order.123"),
    )

    response = app.post(url_for('items.save'), content_type='multipart/form-data', data=data)