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1. package QuickCheck

   Automatic testing of Haskell programs QuickCheck is a library for random testing of program properties. The programmer provides a specification of the program, in the form of properties which functions should satisfy, and QuickCheck then tests that the properties hold in a large number of randomly generated cases. Specifications are expressed in Haskell, using combinators provided by QuickCheck. QuickCheck provides combinators to define properties, observe the distribution of test data, and define test data generators. Most of QuickCheck's functionality is exported by the main Test.QuickCheck module. The main exception is the monadic property testing library in Test.QuickCheck.Monadic. If you are new to QuickCheck, you can try looking at the following resources:

   • The official QuickCheck manual. It's a bit out-of-date in some details and doesn't cover newer QuickCheck features, but is still full of good advice.
   • https://begriffs.com/posts/2017-01-14-design-use-quickcheck.html, a detailed tutorial written by a user of QuickCheck.
   The quickcheck-instances companion package provides instances for types in Haskell Platform packages at the cost of additional dependencies.

2. package hspec

   A Testing Framework for Haskell Hspec is a testing framework for Haskell. Some of Hspec's distinctive features are:

   • a friendly DSL for defining tests
   • integration with QuickCheck, SmallCheck, and HUnit
   • parallel test execution
   • automatic discovery of test files
   The Hspec Manual is at https://hspec.github.io/.

3. package tasty

   Modern and extensible testing framework Tasty is a modern testing framework for Haskell. It lets you combine your unit tests, golden tests, QuickCheck/SmallCheck properties, and any other types of tests into a single test suite.

4. package vector

   Efficient Arrays . An efficient implementation of Int-indexed arrays (both mutable and immutable), with a powerful loop optimisation framework . . It is structured as follows: . [Data.Vector] Boxed vectors of arbitrary types. . [Data.Vector.Unboxed] Unboxed vectors with an adaptive representation based on data type families. . [Data.Vector.Storable] Unboxed vectors of Storable types. . [Data.Vector.Primitive] Unboxed vectors of primitive types as defined by the primitive package. Data.Vector.Unboxed is more flexible at no performance cost. . [Data.Vector.Generic] Generic interface to the vector types. . There is also a (draft) tutorial on common uses of vector. . * http://haskell.org/haskellwiki/Numeric_Haskell:_A_Vector_Tutorial

5. package aeson

   Fast JSON parsing and encoding A JSON parsing and encoding library optimized for ease of use and high performance. To get started, see the documentation for the Data.Aeson module below. (A note on naming: in Greek mythology, Aeson was the father of Jason.)

6. package tasty-hunit

   HUnit support for the Tasty test framework. HUnit support for the Tasty test framework. Note that this package does not depend on HUnit but implements the relevant subset of its API. The name is a legacy of the early versions of tasty-hunit and of test-framework-hunit, which did depend on HUnit.

7. package unordered-containers

   Efficient hashing-based container types Efficient hashing-based container types. The containers have been optimized for performance critical use, both in terms of large data quantities and high speed. The declared cost of each operation is either worst-case or amortized, but remains valid even if structures are shared. Security This package currently provides no defenses against hash collision attacks such as HashDoS. Users who need to store input from untrusted sources are advised to use Data.Map or Data.Set from the containers package instead.

8. package HUnit

   A unit testing framework for Haskell HUnit is a unit testing framework for Haskell, inspired by the JUnit tool for Java, see: http://www.junit.org.

9. package tasty-quickcheck

   QuickCheck support for the Tasty test framework. QuickCheck support for the Tasty test framework.

10. package hashable

    A class for types that can be converted to a hash value This package defines a class, Hashable, for types that can be converted to a hash value. This class exists for the benefit of hashing-based data structures. The package provides instances for basic types and a way to combine hash values. Hashable is intended exclusively for use in in-memory data structures. Hashable does not have a fixed standard. This allows it to improve over time. Because it does not have a fixed standard, different computers or computers on different versions of the code will observe different hash values. As such, hashable is not recommended for use other than in-memory datastructures. Specifically, hashable is not intended for network use or in applications which persist hashed values. For stable hashing use named hashes: sha256, crc32, xxhash etc.

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