Writing tests in Massa

[AurelienFT]

Introduction

Writing tests in a complex environments where multiple actors plays together can be challenging and leads to spaghetti code. In Massa we have multiple modules that runs concurrently and interacts together.
Each module has an interface to be called by the others. We need to provide a simple, comprehensive and easy to use resource to initialize all the modules that communicate with the one we are testing.

Proposal

Inspired from a talk from Quickwit at the FOSDEM 2023 I propose to design an Universe that will be able to provide everything that is necessary to each tests in a standardized way. Here is a list of all the possibility that will be included in the Universe :

• Provide a mock for each module that communicate with the test (the mocks are created using the crate mockall)
• Allow to control time to ensure stability on tests that depends on the time (protocol / consensus)
• Provide utilities functions to create operation/blocks/endorsements
• Have the default panic handler
• Be able to display the logs written by the tracing crate
• TBD by trying in the code