062: elm-test v2 with Martin Janiczek

Elm Radio

• Martin Janiczek (github) (twitter) (youtube)
• elm-test episode
• Fuzzing is also known as Property-Based Testing
• Parameterized tests
• Martin's pure Elm text editor includes some fuzz tests
• Martin's pull request for the elm-test v2 changes
• Integrated shrinking vs the value-based (AKA type-based) approach
• Fuzz.andThen and Fuzz.filter (existed in 0.18 but were removed because they didn't shrink well)
• elm-test v2 upgrade guide and change notes
• Passing in random generators in elm-test v2 doesn't do shrinking so best to avoid that escape hatch and instead implement an equivalent fuzzer
• Scott Wlaschin's post Choosing properties for property-based testing
• Discourse post on call for testing help and how to install the beta release
• Martin's video series on designing the new fuzz testing API
• #testing channel on the Elm Slack
• Hypothesis library
• Hypothesis project's blog
• A paper about the Hypothesis reduction approach: Test-Case Reduction via Test-Case Generation: Insights From the Hypothesis Reducer