What are some examples of property-based testing?

What are some examples of property-based testing?

Property-based testing is a testing technique where properties or invariants of the code are defined, and tests are generated to ensure these properties hold. For example, if you have a function that sorts a list, a property could be that the output list is always sorted.

Can you give me more specific examples?

Sure! One example is testing a function that concatenates two lists. A property to test could be that the length of the concatenated list is equal to the sum of the lengths of the two input lists.

What tools can I use for property-based testing?

There are several tools available for property-based testing, such as QuickCheck for Haskell, Hypothesis for Python, and ScalaCheck for Scala. These tools help automate the generation of test cases based on the defined properties.

How does property-based testing differ from example-based testing?

Property-based testing focuses on general properties that should hold true for a wide range of inputs, while example-based testing relies on specific examples to validate the behavior of the code.