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>QuickCheck-1.2.0.0: Automatic testing of Haskell programs</TD
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>Contents</A
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>Test.QuickCheck</FONT
></TD
><TD ALIGN="right"
><TABLE CLASS="narrow" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="infohead"
>Portability</TD
><TD CLASS="infoval"
>portable</TD
></TR
><TR
><TD CLASS="infohead"
>Stability</TD
><TD CLASS="infoval"
>experimental</TD
></TR
><TR
><TD CLASS="infohead"
>Maintainer</TD
><TD CLASS="infoval"
>libraries@haskell.org</TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Description</TD
></TR
><TR
><TD CLASS="doc"
>QuickCheck v.0.2
 DRAFT implementation; last update 000104.
 Koen Claessen, John Hughes.
 This file represents work in progress, and might change at a later date.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
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><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Documentation</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:quickCheck"
><A NAME="v%3AquickCheck"
></A
></A
><B
>quickCheck</B
> :: <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> a =&gt; a -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:verboseCheck"
><A NAME="v%3AverboseCheck"
></A
></A
><B
>verboseCheck</B
> :: <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> a =&gt; a -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:test"
><A NAME="v%3Atest"
></A
></A
><B
>test</B
> :: <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> a =&gt; a -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:Config"
><A NAME="t%3AConfig"
></A
></A
><B
>Config</B
>  </TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="section4"
>Constructors</TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="5" CELLPADDING="0"
><TR
><TD CLASS="arg"
><A NAME="v:Config"
><A NAME="v%3AConfig"
></A
></A
><B
>Config</B
></TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="body" COLSPAN="2"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="arg"
><A NAME="v:configMaxTest"
><A NAME="v%3AconfigMaxTest"
></A
></A
><B
>configMaxTest</B
> :: <A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
></TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
><A NAME="v:configMaxFail"
><A NAME="v%3AconfigMaxFail"
></A
></A
><B
>configMaxFail</B
> :: <A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
></TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
><A NAME="v:configSize"
><A NAME="v%3AconfigSize"
></A
></A
><B
>configSize</B
> :: <A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
> -&gt; <A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
></TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
><A NAME="v:configEvery"
><A NAME="v%3AconfigEvery"
></A
></A
><B
>configEvery</B
> :: <A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
> -&gt; [<A HREF="../base/Data-Char.html#t%3AString"
>String</A
>] -&gt; <A HREF="../base/Data-Char.html#t%3AString"
>String</A
></TD
><TD CLASS="rdoc"
></TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:defaultConfig"
><A NAME="v%3AdefaultConfig"
></A
></A
><B
>defaultConfig</B
> :: <A HREF="Test-QuickCheck.html#t%3AConfig"
>Config</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:check"
><A NAME="v%3Acheck"
></A
></A
><B
>check</B
> :: <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> a =&gt; <A HREF="Test-QuickCheck.html#t%3AConfig"
>Config</A
> -&gt; a -&gt; <A HREF="../base/System-IO.html#t%3AIO"
>IO</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:forAll"
><A NAME="v%3AforAll"
></A
></A
><B
>forAll</B
> :: (<A HREF="../base/Text-Show.html#t%3AShow"
>Show</A
> a, <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> b) =&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a -&gt; (a -&gt; b) -&gt; <A HREF="Test-QuickCheck.html#t%3AProperty"
>Property</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:==>"
><A NAME="v%3A%3D%3D%3E"
></A
></A
><B
>(==&gt;)</B
> :: <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> a =&gt; <A HREF="../ghc-prim/GHC-Bool.html#t%3ABool"
>Bool</A
> -&gt; a -&gt; <A HREF="Test-QuickCheck.html#t%3AProperty"
>Property</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:label"
><A NAME="v%3Alabel"
></A
></A
><B
>label</B
> :: <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> a =&gt; <A HREF="../base/Data-Char.html#t%3AString"
>String</A
> -&gt; a -&gt; <A HREF="Test-QuickCheck.html#t%3AProperty"
>Property</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:collect"
><A NAME="v%3Acollect"
></A
></A
><B
>collect</B
> :: (<A HREF="../base/Text-Show.html#t%3AShow"
>Show</A
> a, <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> b) =&gt; a -&gt; b -&gt; <A HREF="Test-QuickCheck.html#t%3AProperty"
>Property</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:classify"
><A NAME="v%3Aclassify"
></A
></A
><B
>classify</B
> :: <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> a =&gt; <A HREF="../ghc-prim/GHC-Bool.html#t%3ABool"
>Bool</A
> -&gt; <A HREF="../base/Data-Char.html#t%3AString"
>String</A
> -&gt; a -&gt; <A HREF="Test-QuickCheck.html#t%3AProperty"
>Property</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:trivial"
><A NAME="v%3Atrivial"
></A
></A
><B
>trivial</B
> :: <A HREF="Test-QuickCheck.html#t%3ATestable"
>Testable</A
> a =&gt; <A HREF="../ghc-prim/GHC-Bool.html#t%3ABool"
>Bool</A
> -&gt; a -&gt; <A HREF="Test-QuickCheck.html#t%3AProperty"
>Property</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:Gen"
><A NAME="t%3AGen"
></A
></A
><B
>Gen</B
> a </TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:Gen')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:Gen" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="../base/Control-Monad.html#t%3AMonad"
>Monad</A
> <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="../base/Control-Monad.html#t%3AFunctor"
>Functor</A
> <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:elements"
><A NAME="v%3Aelements"
></A
></A
><B
>elements</B
> ::  [a] -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:two"
><A NAME="v%3Atwo"
></A
></A
><B
>two</B
> :: <A HREF="../base/Control-Monad.html#t%3AMonad"
>Monad</A
> m =&gt; m a -&gt; m (a, a)</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:three"
><A NAME="v%3Athree"
></A
></A
><B
>three</B
> :: <A HREF="../base/Control-Monad.html#t%3AMonad"
>Monad</A
> m =&gt; m a -&gt; m (a, a, a)</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:four"
><A NAME="v%3Afour"
></A
></A
><B
>four</B
> :: <A HREF="../base/Control-Monad.html#t%3AMonad"
>Monad</A
> m =&gt; m a -&gt; m (a, a, a, a)</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:sized"
><A NAME="v%3Asized"
></A
></A
><B
>sized</B
> ::  (<A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
> -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a) -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:resize"
><A NAME="v%3Aresize"
></A
></A
><B
>resize</B
> ::  <A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
> -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:choose"
><A NAME="v%3Achoose"
></A
></A
><B
>choose</B
> :: <A HREF="../random/System-Random.html#t%3ARandom"
>Random</A
> a =&gt; (a, a) -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:oneof"
><A NAME="v%3Aoneof"
></A
></A
><B
>oneof</B
> ::  [<A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a] -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:frequency"
><A NAME="v%3Afrequency"
></A
></A
><B
>frequency</B
> ::  [(<A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
>, <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a)] -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:vector"
><A NAME="v%3Avector"
></A
></A
><B
>vector</B
> :: <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> a =&gt; <A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
> -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> [a]</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>class</SPAN
>  <A NAME="t:Arbitrary"
><A NAME="t%3AArbitrary"
></A
></A
><B
>Arbitrary</B
> a  <SPAN CLASS="keyword"
>where</SPAN
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="section4"
>Methods</TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A NAME="v:arbitrary"
><A NAME="v%3Aarbitrary"
></A
></A
><B
>arbitrary</B
> :: <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:coarbitrary"
><A NAME="v%3Acoarbitrary"
></A
></A
><B
>coarbitrary</B
> ::  a -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> b -&gt; <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> b</TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:Arbitrary')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:Arbitrary" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> <A HREF="../ghc-prim/GHC-Bool.html#t%3ABool"
>Bool</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> <A HREF="../ghc-prim/GHC-Types.html#t%3ADouble"
>Double</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> <A HREF="../ghc-prim/GHC-Types.html#t%3AFloat"
>Float</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> <A HREF="../ghc-prim/GHC-Types.html#t%3AInt"
>Int</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> <A HREF="../integer/GHC-Integer.html#t%3AInteger"
>Integer</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> <A HREF="../ghc-prim/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> a =&gt; <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> ([] a)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> a =&gt; <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> (<A HREF="../base/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> a)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> (Poly a)</TD
></TR
><TR
><TD CLASS="decl"
>(<A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> a, <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> b) =&gt; <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> (a -&gt; b)</TD
></TR
><TR
><TD CLASS="decl"
>(<A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> a, <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> b) =&gt; <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> (<A HREF="../base/Data-Either.html#t%3AEither"
>Either</A
> a b)</TD
></TR
><TR
><TD CLASS="decl"
>(<A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> a, <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> b) =&gt; <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> (<A HREF="../ghc-prim/GHC-Tuple.html#t%3A%28%2C%29"
>(,)</A
> a b)</TD
></TR
><TR
><TD CLASS="decl"
>(<A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> a, <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> b, <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> c) =&gt; <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> (<A HREF="../ghc-prim/GHC-Tuple.html#t%3A%28%2C%2C%29"
>(,,)</A
> a b c)</TD
></TR
><TR
><TD CLASS="decl"
>(<A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> a, <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> b, <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> c, <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> d) =&gt; <A HREF="Test-QuickCheck.html#t%3AArbitrary"
>Arbitrary</A
> (<A HREF="../ghc-prim/GHC-Tuple.html#t%3A%28%2C%2C%2C%29"
>(,,,)</A
> a b c d)</TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="decl"
><A NAME="v:rand"
><A NAME="v%3Arand"
></A
></A
><B
>rand</B
> :: <A HREF="Test-QuickCheck.html#t%3AGen"
>Gen</A
> <A HREF="../random/System-Random.html#t%3AStdGen"
>StdGen</A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
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