Proptest vs QuickTheories
Proptest
proptest-rs.github.ioQuickTheories
github.comSide by side
| Figure | Proptest | QuickTheories |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 0 | 1 |
| Spec score · Property-Based Testing Tools | 7.0 (#20) | 7.7 (#10) |
| Input generation | Generation and shrinking are defined per value rather than per type. | It automatically generates random samples of valid inputs to check whether properties hold. |
| Purpose | Proptest is a property testing framework for Rust inspired by Python’s Hypothesis framework. | QuickTheories is a property based testing library for Java 8, described as a Java version of QuickCheck. |
Plans
In their own words
Proptest
Proptest has no write-up on Specifiction yet; its figures are above.
QuickTheories
QuickTheories is a free, open-source property-based testing library for Java 8. It checks general properties and invariants by generating random valid inputs, then automatically searches for smaller or simpler values that still fail a property. The library reports the seed for a falsified property, and tests can use fixed seeds for deterministic runs. Its generator DSL creates common Java types, constrains values, and combines or converts generators for custom types. QuickTheories works with JUnit, TestNG, and other test frameworks; `checkAssert` supports assertion libraries such as AssertJ and Hamcrest. The `forAll` API handles theories over one to four generated values. System properties configure seeds, example counts, and shrink attempts, while named profiles can reuse settings. An experimental coverage feature targets new code paths, but may reduce performance by about 10% and interfere with JaCoCo or other coverage systems. The project uses the Apache-2.0 license.