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<title>src/Test/Hspec/Core/Example.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, TypeFamilies, FlexibleInstances, TypeSynonymInstances, DeriveDataTypeable #-}</span>
<a name="line-2"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>Hspec</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span><span class='hs-varop'>.</span><span class='hs-conid'>Example</span> <span class='hs-layout'>(</span>
<a name="line-3"></a> <span class='hs-conid'>Example</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-4"></a><span class='hs-layout'>,</span> <span class='hs-conid'>Params</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-5"></a><span class='hs-layout'>,</span> <span class='hs-varid'>defaultParams</span>
<a name="line-6"></a><span class='hs-layout'>,</span> <span class='hs-conid'>ActionWith</span>
<a name="line-7"></a><span class='hs-layout'>,</span> <span class='hs-conid'>Progress</span>
<a name="line-8"></a><span class='hs-layout'>,</span> <span class='hs-conid'>ProgressCallback</span>
<a name="line-9"></a><span class='hs-layout'>,</span> <span class='hs-conid'>Result</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-10"></a><span class='hs-layout'>,</span> <span class='hs-conid'>Location</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-11"></a><span class='hs-layout'>,</span> <span class='hs-conid'>LocationAccuracy</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromMaybe</span><span class='hs-layout'>)</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>isPrefixOf</span><span class='hs-layout'>)</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>HUnit</span><span class='hs-varop'>.</span><span class='hs-conid'>Lang</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>HUnit</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>E</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Typeable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>QuickCheck</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>QC</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>Hspec</span><span class='hs-varop'>.</span><span class='hs-conid'>Expectations</span> <span class='hs-layout'>(</span><span class='hs-conid'>Expectation</span><span class='hs-layout'>)</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>QuickCheck</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>QC</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>QuickCheck</span><span class='hs-varop'>.</span><span class='hs-conid'>Property</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>QCP</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>Hspec</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span><span class='hs-varop'>.</span><span class='hs-conid'>QuickCheckUtil</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>Hspec</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>Hspec</span><span class='hs-varop'>.</span><span class='hs-conid'>Compat</span>
<a name="line-28"></a>
<a name="line-29"></a><a name="Example"></a><span class='hs-comment'>-- | A type class for examples</span>
<a name="line-30"></a><a name="Example"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Example</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>where</span>
<a name="line-31"></a> <span class='hs-keyword'>type</span> <span class='hs-conid'>Arg</span> <span class='hs-varid'>e</span>
<a name="line-32"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 704</span>
<a name="line-33"></a> <span class='hs-keyword'>type</span> <span class='hs-conid'>Arg</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
<a name="line-34"></a><span class='hs-cpp'>#endif</span>
<a name="line-35"></a> <span class='hs-varid'>evaluateExample</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Params</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>ActionWith</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ProgressCallback</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Result</span>
<a name="line-36"></a>
<a name="line-37"></a><a name="Params"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Params</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Params</span> <span class='hs-layout'>{</span>
<a name="line-38"></a> <span class='hs-varid'>paramsQuickCheckArgs</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>Args</span>
<a name="line-39"></a><span class='hs-layout'>,</span> <span class='hs-varid'>paramsSmallCheckDepth</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-40"></a><span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-41"></a>
<a name="line-42"></a><a name="defaultParams"></a><span class='hs-definition'>defaultParams</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Params</span>
<a name="line-43"></a><span class='hs-definition'>defaultParams</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Params</span> <span class='hs-layout'>{</span>
<a name="line-44"></a> <span class='hs-varid'>paramsQuickCheckArgs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>stdArgs</span>
<a name="line-45"></a><span class='hs-layout'>,</span> <span class='hs-varid'>paramsSmallCheckDepth</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>5</span>
<a name="line-46"></a><span class='hs-layout'>}</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="Progress"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Progress</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-49"></a><a name="ProgressCallback"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ProgressCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Progress</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-50"></a>
<a name="line-51"></a><a name="ActionWith"></a><span class='hs-comment'>-- | An `IO` action that expects an argument of type @a@</span>
<a name="line-52"></a><a name="ActionWith"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ActionWith</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-53"></a>
<a name="line-54"></a><a name="Result"></a><span class='hs-comment'>-- | The result of running an example</span>
<a name="line-55"></a><a name="Result"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Result</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Success</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Pending</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Fail</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Location</span><span class='hs-layout'>)</span> <span class='hs-conid'>String</span>
<a name="line-56"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-57"></a>
<a name="line-58"></a><a name="instance%20E.Exception%20Result"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>E</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <span class='hs-conid'>Result</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="Location"></a><span class='hs-comment'>-- | @Location@ is used to represent source locations.</span>
<a name="line-61"></a><a name="Location"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Location</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Location</span> <span class='hs-layout'>{</span>
<a name="line-62"></a> <span class='hs-varid'>locationFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span>
<a name="line-63"></a><span class='hs-layout'>,</span> <span class='hs-varid'>locationLine</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-64"></a><span class='hs-layout'>,</span> <span class='hs-varid'>locationColumn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>
<a name="line-65"></a><span class='hs-layout'>,</span> <span class='hs-varid'>locationAccuracy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>LocationAccuracy</span>
<a name="line-66"></a><span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="LocationAccuracy"></a><span class='hs-comment'>-- | A marker for source locations</span>
<a name="line-69"></a><a name="LocationAccuracy"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>LocationAccuracy</span> <span class='hs-keyglyph'>=</span>
<a name="line-70"></a> <span class='hs-comment'>-- | The source location is accurate</span>
<a name="line-71"></a> <span class='hs-conid'>ExactLocation</span> <span class='hs-keyglyph'>|</span>
<a name="line-72"></a> <span class='hs-comment'>-- | The source location was determined on a best-effort basis and my be</span>
<a name="line-73"></a> <span class='hs-comment'>-- wrong or inaccurate</span>
<a name="line-74"></a> <span class='hs-conid'>BestEffort</span>
<a name="line-75"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="instance%20Example%20Bool"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Example</span> <span class='hs-conid'>Bool</span> <span class='hs-keyword'>where</span>
<a name="line-78"></a> <span class='hs-keyword'>type</span> <span class='hs-conid'>Arg</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
<a name="line-79"></a> <span class='hs-varid'>evaluateExample</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Success</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Fail</span> <span class='hs-conid'>Nothing</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="instance%20Example%20Expectation"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Example</span> <span class='hs-conid'>Expectation</span> <span class='hs-keyword'>where</span>
<a name="line-82"></a> <span class='hs-keyword'>type</span> <span class='hs-conid'>Arg</span> <span class='hs-conid'>Expectation</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
<a name="line-83"></a> <span class='hs-varid'>evaluateExample</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>evaluateExample</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-84"></a>
<a name="line-85"></a><a name="hunitFailureToResult"></a><span class='hs-definition'>hunitFailureToResult</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HUnit</span><span class='hs-varop'>.</span><span class='hs-conid'>HUnitFailure</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Result</span>
<a name="line-86"></a><span class='hs-definition'>hunitFailureToResult</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-87"></a><span class='hs-cpp'>#if MIN_VERSION_HUnit(1,3,0)</span>
<a name="line-88"></a> <span class='hs-conid'>HUnit</span><span class='hs-varop'>.</span><span class='hs-conid'>HUnitFailure</span> <span class='hs-varid'>mLoc</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Fail</span> <span class='hs-varid'>location</span> <span class='hs-varid'>err</span>
<a name="line-89"></a> <span class='hs-keyword'>where</span>
<a name="line-90"></a> <span class='hs-varid'>location</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mLoc</span> <span class='hs-keyword'>of</span>
<a name="line-91"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-92"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>loc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Location</span> <span class='hs-layout'>(</span><span class='hs-conid'>HUnit</span><span class='hs-varop'>.</span><span class='hs-varid'>locationFile</span> <span class='hs-varid'>loc</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>HUnit</span><span class='hs-varop'>.</span><span class='hs-varid'>locationLine</span> <span class='hs-varid'>loc</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>HUnit</span><span class='hs-varop'>.</span><span class='hs-varid'>locationColumn</span> <span class='hs-varid'>loc</span><span class='hs-layout'>)</span> <span class='hs-conid'>ExactLocation</span>
<a name="line-93"></a><span class='hs-cpp'>#else</span>
<a name="line-94"></a> <span class='hs-conid'>HUnit</span><span class='hs-varop'>.</span><span class='hs-conid'>HUnitFailure</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Fail</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>err</span>
<a name="line-95"></a><span class='hs-cpp'>#endif</span>
<a name="line-96"></a>
<a name="line-97"></a><a name="instance%20Example%20(a%20-%3e%20Expectation)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Example</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Expectation</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-98"></a> <span class='hs-keyword'>type</span> <span class='hs-conid'>Arg</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Expectation</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span>
<a name="line-99"></a> <span class='hs-varid'>evaluateExample</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>action</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>action</span> <span class='hs-varid'>e</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Success</span><span class='hs-layout'>)</span> <span class='hs-varop'>`</span><span class='hs-conid'>E</span><span class='hs-varop'>.</span><span class='hs-varid'>catches</span><span class='hs-varop'>`</span> <span class='hs-keyglyph'>[</span>
<a name="line-100"></a> <span class='hs-conid'>E</span><span class='hs-varop'>.</span><span class='hs-conid'>Handler</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>hunitFailureToResult</span><span class='hs-layout'>)</span>
<a name="line-101"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>E</span><span class='hs-varop'>.</span><span class='hs-conid'>Handler</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Result</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Result</span><span class='hs-layout'>)</span>
<a name="line-102"></a> <span class='hs-keyglyph'>]</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="instance%20Example%20Result"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Example</span> <span class='hs-conid'>Result</span> <span class='hs-keyword'>where</span>
<a name="line-105"></a> <span class='hs-keyword'>type</span> <span class='hs-conid'>Arg</span> <span class='hs-conid'>Result</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
<a name="line-106"></a> <span class='hs-varid'>evaluateExample</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>r</span>
<a name="line-107"></a>
<a name="line-108"></a><a name="instance%20Example%20QC.Property"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Example</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>Property</span> <span class='hs-keyword'>where</span>
<a name="line-109"></a> <span class='hs-keyword'>type</span> <span class='hs-conid'>Arg</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>Property</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>()</span>
<a name="line-110"></a> <span class='hs-varid'>evaluateExample</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>evaluateExample</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="instance%20Example%20(a%20-%3e%20QC.Property)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Example</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>Property</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-113"></a> <span class='hs-keyword'>type</span> <span class='hs-conid'>Arg</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>Property</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span>
<a name="line-114"></a> <span class='hs-varid'>evaluateExample</span> <span class='hs-varid'>p</span> <span class='hs-varid'>c</span> <span class='hs-varid'>action</span> <span class='hs-varid'>progressCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-115"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>quickCheckWithResult</span> <span class='hs-layout'>(</span><span class='hs-varid'>paramsQuickCheckArgs</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>{</span><span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>chatty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span><span class='hs-layout'>}</span> <span class='hs-layout'>(</span><span class='hs-conid'>QCP</span><span class='hs-varop'>.</span><span class='hs-varid'>callback</span> <span class='hs-varid'>qcProgressCallback</span> <span class='hs-varop'>$</span> <span class='hs-varid'>aroundProperty</span> <span class='hs-varid'>action</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-116"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span>
<a name="line-117"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>of</span>
<a name="line-118"></a> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>Success</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Success</span>
<a name="line-119"></a> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>Failure</span> <span class='hs-layout'>{</span><span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>output</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fromMaybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Fail</span> <span class='hs-conid'>Nothing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sanitizeFailureMessage</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>parsePending</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-120"></a> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>GaveUp</span> <span class='hs-layout'>{</span><span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>numTests</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Fail</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-str'>"Gave up after "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>pluralize</span> <span class='hs-varid'>n</span> <span class='hs-str'>"test"</span> <span class='hs-layout'>)</span>
<a name="line-121"></a> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>NoExpectedFailure</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Fail</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-str'>"No expected failure"</span><span class='hs-layout'>)</span>
<a name="line-122"></a><span class='hs-cpp'>#if MIN_VERSION_QuickCheck(2,8,0)</span>
<a name="line-123"></a> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>InsufficientCoverage</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Fail</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-str'>"Insufficient coverage"</span><span class='hs-layout'>)</span>
<a name="line-124"></a><span class='hs-cpp'>#endif</span>
<a name="line-125"></a> <span class='hs-keyword'>where</span>
<a name="line-126"></a> <span class='hs-varid'>qcProgressCallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>QCP</span><span class='hs-varop'>.</span><span class='hs-conid'>PostTest</span> <span class='hs-conid'>QCP</span><span class='hs-varop'>.</span><span class='hs-conid'>NotCounterexample</span> <span class='hs-varop'>$</span>
<a name="line-127"></a> <span class='hs-keyglyph'>\</span><span class='hs-varid'>st</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>progressCallback</span> <span class='hs-layout'>(</span><span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>numSuccessTests</span> <span class='hs-varid'>st</span><span class='hs-layout'>,</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>maxSuccessTests</span> <span class='hs-varid'>st</span><span class='hs-layout'>)</span>
<a name="line-128"></a>
<a name="line-129"></a> <span class='hs-varid'>sanitizeFailureMessage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-conid'>Result</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-130"></a> <span class='hs-varid'>sanitizeFailureMessage</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>output</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>in</span> <span class='hs-varid'>strip</span> <span class='hs-varop'>$</span>
<a name="line-131"></a><span class='hs-cpp'>#if MIN_VERSION_QuickCheck(2,7,0)</span>
<a name="line-132"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>QC</span><span class='hs-varop'>.</span><span class='hs-varid'>theException</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>of</span>
<a name="line-133"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>numbers</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>formatNumbers</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>in</span>
<a name="line-134"></a> <span class='hs-str'>"uncaught exception: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>formatException</span> <span class='hs-varid'>e</span> <span class='hs-varop'>++</span> <span class='hs-str'>" "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>numbers</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\n"</span> <span class='hs-varop'>++</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lines</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-135"></a> <span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-varid'>exceptionPrefix</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>e</span> <span class='hs-varop'>++</span> <span class='hs-str'>"' "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>numbers</span> <span class='hs-varop'>++</span> <span class='hs-str'>": "</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unlines</span> <span class='hs-varid'>xs</span>
<a name="line-136"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span>
<a name="line-137"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span>
<a name="line-138"></a><span class='hs-cpp'>#endif</span>
<a name="line-139"></a> <span class='hs-layout'>(</span><span class='hs-varid'>addFalsifiable</span> <span class='hs-varop'>.</span> <span class='hs-varid'>stripFailed</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span>
<a name="line-140"></a>
<a name="line-141"></a> <span class='hs-varid'>addFalsifiable</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-142"></a> <span class='hs-varid'>addFalsifiable</span> <span class='hs-varid'>m</span>
<a name="line-143"></a> <span class='hs-keyglyph'>|</span> <span class='hs-str'>"(after "</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"Falsifiable "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>m</span>
<a name="line-144"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span>
<a name="line-145"></a>
<a name="line-146"></a> <span class='hs-varid'>stripFailed</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-147"></a> <span class='hs-varid'>stripFailed</span> <span class='hs-varid'>m</span>
<a name="line-148"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>prefix</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drop</span> <span class='hs-varid'>n</span> <span class='hs-varid'>m</span>
<a name="line-149"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span>
<a name="line-150"></a> <span class='hs-keyword'>where</span>
<a name="line-151"></a> <span class='hs-varid'>prefix</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"*** Failed! "</span>
<a name="line-152"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>prefix</span>
<a name="line-153"></a>
<a name="line-154"></a> <span class='hs-varid'>parsePending</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Result</span>
<a name="line-155"></a> <span class='hs-varid'>parsePending</span> <span class='hs-varid'>m</span>
<a name="line-156"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>exceptionPrefix</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>readMaybe</span> <span class='hs-varop'>.</span> <span class='hs-varid'>takeWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-chr'>'\''</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>drop</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span>
<a name="line-157"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-158"></a> <span class='hs-keyword'>where</span>
<a name="line-159"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>exceptionPrefix</span>
<a name="line-160"></a>
<a name="line-161"></a> <span class='hs-varid'>exceptionPrefix</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"*** Failed! Exception: '"</span>
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