Test-driven FaaS with Docker

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How to develop and test eﬃciently in a Serverless World

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Agenda ❏ Introduction ❏ The Serverless paradigm ❏ FaaS explained ❏ Testing in a FaaS world ❏ Demo ❏ Q&A

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#1 The Serverless Paradigm

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Next Service-Full Cloud Data Code Events No more server concerns, but only events, data and code in a fully managed way.

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#2 Function as a Service explained (Lambda)

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...run code based on events without managing servers

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1 request 2 ﬁnd 3 load 4 exec 5 response 0 deploy

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Understanding AWS lambda costs Factors involved ❏ Number of executions ❏ Memory usage ❏ CPU time Cost components ❏ Invocations ❏ GB-s

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#3 Testing in a FaaS World

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Build the right Feedback Loop: fast, reliable, isolating failures

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Test Automation Pyramid

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Feedback loop granularity speed granularity reliability granularity failure isolation

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Abstractions for 3rd party implementations hide important details about the implementation itself

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roles and policies MUST MATCH across AWS accounts

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#4 Demo

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GraphQL-Vault API

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Automate integration tests and deployments just like any other piece of software test locally commit code build (packaging) deploy to test stage run automated tests promote to production development

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Nicola Baldi @NicolaBaldi https://github.com/naighes/ Luca Milan @fewbit https://github.com/lucamilan/ Q&A