Speculative Development

on YouTube ↗24m

" summary

Shows how clojure.spec is used to validate data, drive generative tests, and produce machine-readable spec forms that are transformed to json-schema and Swagger for cross-language validation. Describes extending spec with docstrings and custom protocol methods, building spec-to-spec transformation functions that generate data mappers, and an open-source library Speculate that converts specs, emits schemas, and performs transformations up to ~1 MB of data; demonstrates it works in production at uSwitch and even accepts posted specs (works but is unsafe).

AI-written summary · about

" chapters (11)

1. 0:00Introduction
2. 1:08Specialized API data structures
3. 3:23Closure spec fundamentals
4. 6:54Extending closure spec with metadata
5. 9:50Custom specs for documentation
6. 12:00JSON schema from closure specs
7. 13:49Validating API specs
8. 15:11Transforming data structures
9. 18:02Categorizing data for transformations
10. 20:59Practical applications of speculate
11. 22:45Benefits of closure specs

" related talks

• 40mCreating DSLs A tale of spec tacular success and failureClaire Alvis · Clojure/west 2016
• 43mspec loves data structuresMichał Marczyk · EuroClojure 2017
• 48mContracts & Clojure: The Best-Yet Compromise of Types and TestsJessica Kerr · Philly ETE 2015
• 31mTesting Made SimpleTony Kay · Clojure/west 2017
• 21mLet there be docs!Svyatoslav Kryukov · Friendly.rb 2023
• 01h 16mSpec-ulation KeynoteRich Hickey · Clojure/conj 2016
• 25mUsing spec to Transparently Replace a Legacy SystemDaniel Solano Gómez · Clojure/west 2017
• 30mOne Spec to Rule them all - OpenAPI in ActionAndreas Litt · code.talks 2019