hspec
hspec is a mature testing framework for Haskell that provides behavior-driven development (BDD) style test specifications. It integrates with property-based testing libraries like QuickCheck and SmallCheck, enabling developers to write expressive, human-readable test suites.
Key facts
Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.
| Field | Value |
|---|---|
| Repository | hspec/hspec |
| Owner | hspec |
| Primary language | Haskell |
| License | MIT — OSI-approved |
| Stars | 784 |
| Forks | 109 |
| Open issues | 61 |
| Latest release | Unknown |
| Last updated | 2026-06-28 |
| Source | https://github.com/hspec/hspec |
What hspec is
hspec is a Haskell testing DSL offering BDD-style test organization, composition, and reporting with built-in support for property-based testing frameworks. It automates release and publication workflows to Hackage via GitHub Actions when version changes are detected.
Get the hspec source
Clone the repository and explore it locally.
git clone https://github.com/hspec/hspec.gitcd hspec# follow the project's README for install & configurationNeed it deployed, integrated, or customized instead? DEV.co ships production installs.
Best use cases
Implementation considerations
- Requires GHC and Cabal/Stack dependency management; integrate into existing Haskell build toolchain.
- Test discovery and organization follow hspec DSL conventions; team standardization on BDD patterns recommended.
- Property-based testing setup (QuickCheck generators) requires additional domain knowledge for effective use.
- CI/CD integration straightforward via standard Cabal/Stack test targets; automated Hackage publication workflow available.
- Version bumping and release process scripted via util/release; automates CHANGES.markdown updates.
When to avoid it — and what to weigh
- Non-Haskell Codebases — hspec is Haskell-only. Not applicable for Python, Go, Java, Node.js, or other language ecosystems.
- Performance-Critical Test Suites — No benchmark data provided on test execution performance. Compilation overhead of Haskell itself may impact CI/CD speed for large test suites.
- Need for End-to-End UI/Integration Testing — hspec focuses on unit and property-based testing. Limited support documented for integration tests, mocking, or web/API automation.
- Minimal Haskell Expertise in Team — Requires Haskell proficiency to write and maintain tests. Learning curve steeper than mainstream language testing frameworks.
License & commercial use
hspec is licensed under the MIT License, an OSI-approved permissive license permitting commercial and private use with attribution.
MIT License is permissive and clearly allows commercial use, modification, and distribution. No known restrictions for closed-source projects using hspec. However, verify Hackage publication policy if distributing hspec itself as a dependency.
DEV.co evaluation signals
Editorial assessment — not user reviews. Directional, with an explicit confidence level.
| Signal | Assessment |
|---|---|
| Maintenance | Active |
| Documentation | Adequate |
| License clarity | Clear |
| Deployment complexity | Low |
| DEV.co fit | Good |
| Assessment confidence | High |
No security vulnerabilities or threat model information provided in the data. Standard Haskell package security applies: verify transitive dependencies and review QuickCheck/SmallCheck generator definitions to avoid unintended property violations. No supply chain or verification mechanisms noted beyond Hackage publishing.
Alternatives to consider
Tasty
Alternative Haskell test framework offering a plugin-based architecture and better composability for large test suites; more flexible for non-BDD styles.
HUnit
Simpler, lower-level unit testing framework for Haskell; less BDD-focused but lighter weight for basic assertion-driven tests.
QuickCheck (standalone)
Property-based testing library for Haskell; used alone if pure property generation suffices without BDD organization and reporting.
Build on hspec with DEV.co software developers
Evaluate hspec for your Haskell project. Review the User's Manual at hspec.github.io, explore integration with your build system, and assess fit for your team's testing maturity and BDD practices.
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hspec FAQ
Does hspec work with Stack and Cabal?
Can I combine unit tests and property-based tests?
Is there a latest release version?
How is hspec licensed for commercial use?
Custom software development services
Adopting hspec is usually one piece of a larger software development effort. As a software development agency, DEV.co provides software development services and web development expertise — pairing senior software developers and web developers with your team to design, build, and operate open-source testing software in production.
Ready to strengthen your Haskell test suite?
Evaluate hspec for your Haskell project. Review the User's Manual at hspec.github.io, explore integration with your build system, and assess fit for your team's testing maturity and BDD practices.