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Unit Testing File Objects in Django with SimpleUploadedFile

SimpleUploadedFile is undocumented, but referenced in the Django documentation.

To use SimpleUploadedFile when unit testing a FileField such as

from django.db import models

class MyModel(models.Model):
    file = models.FileField(upload_to='somewhere')

Create a SimpleUploadedFile with Model Bakery, for example, in a test:

from model_bakery import baker

from django.core.files.uploadedfile import SimpleUploadedFile

#... some other code ...

baker.make(
    'myapp.MyModel', 
    # note that the file content must be bytes
    file=SimpleUploadedFile('file.jpg', b"file_content", content_type='image/jpeg')
)

# ... some more code ...

You can now test code that references that file object.

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