Increase test coverage

[antonpirker]

How do you use Sentry?

Sentry Saas (sentry.io)

Version

all

Steps to Reproduce

Those files have very low test coverage and we should revise the tests and improve the coverage:

• attachments.py
• utils.py
• worker.py (background worker to send events)

Expected Result

Test coverage as high as possible

Actual Result

Tow test coverage