Add hedgehog-dieharder package

This is a stripped-down version of
https://github.com/phadej/splitmix/blob/90265357da5c8660f1d488018743c9ef78a057ca/tests/Dieharder.hs

Resolves #125

.travis.yml

@@ -86,11 +86,14 @@ install:
       cabal new-update head.hackage -v
     fi
   - grep -Ev -- '^\s*--' ${HOME}/.cabal/config | grep -Ev '^\s*$'
-  - "printf 'packages: \"hedgehog\" \"hedgehog-example\" \"hedgehog-quickcheck\"\\n' > cabal.project"
+  - "printf 'packages: \"hedgehog\" \"hedgehog-dieharder\" \"hedgehog-example\" \"hedgehog-quickcheck\"\\n' > cabal.project"
   - cat cabal.project
   - if [ -f "hedgehog/configure.ac" ]; then
       (cd "hedgehog" && autoreconf -i);
     fi
+  - if [ -f "hedgehog-dieharder/configure.ac" ]; then
+      (cd "hedgehog-dieharder" && autoreconf -i);
+    fi
   - if [ -f "hedgehog-example/configure.ac" ]; then
       (cd "hedgehog-example" && autoreconf -i);
     fi
@@ -100,20 +103,21 @@ install:
   - rm -f cabal.project.freeze
   - cabal new-build -w ${HC} ${TEST} ${BENCH} --project-file="cabal.project" --dep -j2 all
   - cabal new-build -w ${HC} --disable-tests --disable-benchmarks --project-file="cabal.project" --dep -j2 all
-  - rm -rf "hedgehog"/.ghc.environment.* "hedgehog-example"/.ghc.environment.* "hedgehog-quickcheck"/.ghc.environment.* "hedgehog"/dist "hedgehog-example"/dist "hedgehog-quickcheck"/dist
+  - rm -rf "hedgehog"/.ghc.environment.* "hedgehog-dieharder"/.ghc.environment.* "hedgehog-example"/.ghc.environment.* "hedgehog-quickcheck"/.ghc.environment.* "hedgehog"/dist "hedgehog-dieharder"/dist "hedgehog-example"/dist "hedgehog-quickcheck"/dist
   - DISTDIR=$(mktemp -d /tmp/dist-test.XXXX)
 
 # Here starts the actual work to be performed for the package under test;
 # any command which exits with a non-zero exit code causes the build to fail.
 script:
   # test that source-distributions can be generated
   - (cd "hedgehog" && cabal sdist)
+  - (cd "hedgehog-dieharder" && cabal sdist)
   - (cd "hedgehog-example" && cabal sdist)
   - (cd "hedgehog-quickcheck" && cabal sdist)
-  - mv "hedgehog"/dist/hedgehog-*.tar.gz "hedgehog-example"/dist/hedgehog-example-*.tar.gz "hedgehog-quickcheck"/dist/hedgehog-quickcheck-*.tar.gz ${DISTDIR}/
+  - mv "hedgehog"/dist/hedgehog-*.tar.gz "hedgehog-dieharder"/dist/hedgehog-dieharder-*.tar.gz "hedgehog-example"/dist/hedgehog-example-*.tar.gz "hedgehog-quickcheck"/dist/hedgehog-quickcheck-*.tar.gz ${DISTDIR}/
   - cd ${DISTDIR} || false
   - find . -maxdepth 1 -name '*.tar.gz' -exec tar -xvf '{}' \;
-  - "printf 'packages: hedgehog-*/*.cabal hedgehog-example-*/*.cabal hedgehog-quickcheck-*/*.cabal\\n' > cabal.project"
+  - "printf 'packages: hedgehog-*/*.cabal hedgehog-dieharder-*/*.cabal hedgehog-example-*/*.cabal hedgehog-quickcheck-*/*.cabal\\n' > cabal.project"
   - cat cabal.project
   # this builds all libraries and executables (without tests/benchmarks)
   - cabal new-build -w ${HC} --disable-tests --disable-benchmarks all
@@ -127,6 +131,7 @@ script:
 
   # cabal check
   - (cd hedgehog-* && cabal check)
+  - (cd hedgehog-dieharder-* && cabal check)
   - (cd hedgehog-example-* && cabal check)
   - (cd hedgehog-quickcheck-* && cabal check)
 

cabal.project

@@ -1,5 +1,6 @@
 packages:
   hedgehog
+  hedgehog-dieharder
   hedgehog-example
   hedgehog-quickcheck
 

hedgehog-dieharder/LICENSE

@@ -0,0 +1,29 @@
+Copyright 2018, Nikos Baxevanis
+All Rights Reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in the
+     documentation and/or other materials provided with the distribution.
+
+  3. Neither the name of the copyright holder nor the names of
+     its contributors may be used to endorse or promote products derived
+     from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

hedgehog-dieharder/hedgehog-dieharder.cabal

@@ -0,0 +1,49 @@
+version: 0
+
+name:
+  hedgehog-dieharder
+author:
+  Nikos Baxevanis
+maintainer:
+  Nikos Baxevanis <[email protected]>
+homepage:
+  https://github.com/hedgehogqa/haskell-hedgehog
+synopsis:
+  Hedgehog dieharder project.
+description:
+  This is the hedgehog dieharder project. It contains diehard tests.
+  The diehard tests are a battery of statistical tests for measuring
+  the quality of our random number generator.
+category:
+  Testing
+license:
+  BSD3
+license-file:
+  LICENSE
+cabal-version:
+  >= 1.8
+build-type:
+  Simple
+tested-with:
+    GHC == 7.10.2
+  , GHC == 7.10.3
+  , GHC == 8.0.1
+  , GHC == 8.0.2
+  , GHC == 8.2.1
+  , GHC == 8.2.2
+  , GHC == 8.4.1
+
+executable dieharder-input
+  main-is:
+    Dieharder.hs
+
+  ghc-options:
+    -Wall -threaded -O2
+
+  hs-source-dirs:
+    test
+
+  build-depends:
+      hedgehog
+    , base                            >= 3          && < 5
+    , bytestring                      >= 0.10.4.0   && < 0.11

hedgehog-dieharder/test/Dieharder.hs

@@ -0,0 +1,15 @@
+import           Data.ByteString.Builder (Builder)
+import qualified Data.ByteString.Builder as Builder
+import           System.IO (stdout)
+
+import           Hedgehog.Internal.Seed (Seed)
+import qualified Hedgehog.Internal.Seed as Seed
+
+main :: IO ()
+main =
+  Builder.hPutBuilder stdout . go =<< Seed.random
+  where
+    go :: Seed -> Builder
+    go s0 =
+      case Seed.nextWord64 s0 of
+        (v0, s1) -> Builder.word64LE v0 `mappend` go s1

hedgehog/src/Hedgehog/Internal/Seed.hs

@@ -16,8 +16,7 @@
 -- overlay (kernel) v113.33.03, and Random.fs in FsCheck v3.
 --
 -- Other than the choice of initial seed for 'from' this port should be
--- faithful. Currently, we have not rerun the DieHarder, or BigCrush tests on
--- this implementation.
+-- faithful.
 --
 -- 1. Guy L. Steele, Jr., Doug Lea, Christine H. Flood
 --    Fast splittable pseudorandom number generators