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id="doc-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,"tocview_0");">►</a></td><td></td><td><a href="" class="tocviewselflink" data-pltdoc="x">Test Support</a></td></tr></table></div><div class="tocviewsublistonly" style="display: none;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1 </td><td><a href="#%28part._.Using_.Check_.Forms%29" class="tocviewlink" data-pltdoc="x">Using Check Forms</a></td></tr><tr><td align="right">2 </td><td><a href="#%28part._.G.U.I_.Interface%29" class="tocviewlink" data-pltdoc="x">GUI Interface</a></td></tr></table></div></div></div><div class="tocsub"><table class="tocsublist" cellspacing="0"><tr><td><span class="tocsublinknumber"></span><a href="#%28part._top%29" class="tocsubseclink" data-pltdoc="x">Test Support</a></td></tr><tr><td><span class="tocsublinknumber">1<tt> </tt></span><a href="#%28part._.Using_.Check_.Forms%29" class="tocsubseclink" data-pltdoc="x">Using Check Forms</a></td></tr><tr><td><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-expect%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">check-<wbr></wbr>expect</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-random%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">check-<wbr></wbr>random</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-satisfied%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">check-<wbr></wbr>satisfied</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-within%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">check-<wbr></wbr>within</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-error%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">check-<wbr></wbr>error</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-member-of%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">check-<wbr></wbr>member-<wbr></wbr>of</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-range%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">check-<wbr></wbr>range</span></span></a></td></tr><tr><td><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._test%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktStxLink">test</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-format%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">test-<wbr></wbr>format</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-silence%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">test-<wbr></wbr>silence</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-execute%29%29" class="tocsubnonseclink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">test-<wbr></wbr>execute</span></span></a></td></tr><tr><td><span class="tocsublinknumber">2<tt> </tt></span><a href="#%28part._.G.U.I_.Interface%29" class="tocsubseclink" data-pltdoc="x">GUI Interface</a></td></tr></table></div></div><div class="maincolumn"><div class="main"><div class="versionbox"><span class="version">6.7</span></div><div class="navsettop"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.7", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.7");">top</a></span><span class="navright"> <span class="nonavigation">← prev</span> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.7");">up</a> <span class="nonavigation">next →</span></span> </div><h2 x-source-module="(lib "test-engine/test-engine.scrbl")" x-source-pkg="htdp-doc" x-part-tag=""top""><a name="(part._top)"></a><a name="(part._.Test_.Support)"></a>Test Support</h2><div class="SAuthorListBox"><span class="SAuthorList"><p class="author">Kathryn Gray</p></span></div><table cellspacing="0" cellpadding="0"><tr><td><p><span class="hspace"> </span><a href="#%28part._.Using_.Check_.Forms%29" class="toptoclink" data-pltdoc="x">1<span class="hspace"> </span>Using Check Forms</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace"> </span><a href="#%28part._.G.U.I_.Interface%29" class="toptoclink" data-pltdoc="x">2<span class="hspace"> </span>GUI Interface</a></p></td></tr></table><h3 x-source-module="(lib "test-engine/test-engine.scrbl")" x-source-pkg="htdp-doc" x-part-tag=""Using_Check_Forms"">1<tt> </tt><a name="(part._.Using_.Check_.Forms)"></a><a name="(mod-path._test-engine/racket-tests)"></a>Using Check Forms</h3><p><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&version=6.7" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="#%28mod-path._test-engine%2Fracket-tests%29" class="RktModLink" data-pltdoc="x"><span class="RktSym">test-engine/racket-tests</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">htdp-lib</span></span></td></tr></table></p><p>This module provides test forms for use in Racket programs, as well
as parameters to configure the behavior of test reports.</p><p>Each check form may only occur at the top-level; results are collected
and reported by the test function. Note that the check forms only
register checks to be performed. The checks are actually run by the
<span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._test%29%29" class="RktStxLink" data-pltdoc="x">test</a></span> function.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._test-engine/racket-tests..rkt)._check-expect))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-expect%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">check-expect</a></span></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="hspace"> </span><span class="RktVar">expected-expr</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Checks whether the value of the <span class="RktVar">expr</span> expression is
<span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._equal%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">equal?</a></span> to the value produced by the <span class="RktVar">expected-expr</span>.</div></p><p>It is an error for <span class="RktVar">expr</span> or <span class="RktVar">expected-expr</span> to produce a function
value or an inexact number.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._test-engine/racket-tests..rkt)._check-random))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-random%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">check-random</a></span></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="hspace"> </span><span class="RktVar">expected-expr</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Checks whether the value of the <span class="RktVar">expr</span> expression is
<span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._equal%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">equal?</a></span> to the value produced by the <span class="RktVar">expected-expr</span>.</div></p><p>The form supplies the same random-number generator to both parts. If both
parts request <span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span> numbers from the same interval in the same
order, they receive the same random numbers.</p><p><div class="SIntrapara">Examples:</div><div class="SIntrapara"><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-random%29%29" class="RktStxLink" data-pltdoc="x">check-random</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">10</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">10</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-random%29%29" class="RktStxLink" data-pltdoc="x">check-random</a></span></td></tr><tr><td><span class="hspace"> </span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=begin.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._begin%2529%2529&version=6.7" class="RktStxLink Sq" data-pltdoc="x">begin</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">100</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">200</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=begin.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._begin%2529%2529&version=6.7" class="RktStxLink Sq" data-pltdoc="x">begin</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">100</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">200</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td></tr><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._test%29%29" class="RktStxLink" data-pltdoc="x">test</a></span><span class="RktPn">)</span></td></tr><tr><td><p><span class="RktOut">Both tests passed!</span></p></td></tr></table></blockquote></div></p><p>If the two parts call <span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span> for different intervals, they are
likely to fail:</p><p><div class="SIntrapara">Examples:</div><div class="SIntrapara"><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-random%29%29" class="RktStxLink" data-pltdoc="x">check-random</a></span></td></tr><tr><td><span class="hspace"> </span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=begin.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._begin%2529%2529&version=6.7" class="RktStxLink Sq" data-pltdoc="x">begin</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">100</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">200</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=begin.html%23%2528form._%2528%2528quote._%7E23%7E25kernel%2529._begin%2529%2529&version=6.7" class="RktStxLink Sq" data-pltdoc="x">begin</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">200</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=generic-numbers.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._random%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">random</a></span><span class="hspace"> </span><span class="RktVal">100</span><span class="RktPn">)</span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td></tr><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._test%29%29" class="RktStxLink" data-pltdoc="x">test</a></span><span class="RktPn">)</span></td></tr><tr><td><table cellspacing="0" cellpadding="0"><tr><td><p><span class="RktOut">Ran 1 check.</span></p></td></tr><tr><td><p><span class="RktOut">0 checks passed.</span></p></td></tr><tr><td><p><span class="RktOut"> Actual value differs from the expected value.</span></p></td></tr><tr><td><p><span class="RktOut"></span><span class="hspace"> </span><span class="RktOut"></span><span class="hspace"> </span><span class="RktOut">Actual value: 116</span></p></td></tr><tr><td><p><span class="RktOut"></span><span class="hspace"> </span><span class="RktOut">Expected value: 58</span></p></td></tr><tr><td><p><span class="RktOut"></span></p></td></tr><tr><td><p><span class="RktOut"></span><span class="hspace"> </span><span class="RktOut">At line 2 column 0</span></p></td></tr></table></td></tr></table></blockquote></div></p><p>It is an error for <span class="RktVar">expr</span> or <span class="RktVar">expected-expr</span> to produce a function
value or an inexact number.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._test-engine/racket-tests..rkt)._check-satisfied))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-satisfied%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">check-satisfied</a></span></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="hspace"> </span><span class="RktVar">property?</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Checks whether the value of the <span class="RktVar">expr</span> expression satisfies
the <span class="RktVar">property?</span> predicate (which must evaluate to a function of one
argument).</div></p><p><div class="SIntrapara">Examples:</div><div class="SIntrapara"><blockquote class="SCodeFlow"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-satisfied%29%29" class="RktStxLink" data-pltdoc="x">check-satisfied</a></span><span class="hspace"> </span><span class="RktVal">1</span><span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=number-types.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._odd%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">odd?</a></span><span class="RktPn">)</span></td></tr><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-satisfied%29%29" class="RktStxLink" data-pltdoc="x">check-satisfied</a></span><span class="hspace"> </span><span class="RktVal">1</span><span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=number-types.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._even%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">even?</a></span><span class="RktPn">)</span></td></tr><tr><td><span class="stt">> </span><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._test%29%29" class="RktStxLink" data-pltdoc="x">test</a></span><span class="RktPn">)</span></td></tr><tr><td><table cellspacing="0" cellpadding="0"><tr><td><p><span class="RktOut">Ran 2 checks.</span></p></td></tr><tr><td><p><span class="RktOut">1 of the 2 checks failed.</span></p></td></tr><tr><td><p><span class="RktOut"></span></p></td></tr><tr><td><p><span class="RktOut"> Actual value 1 does not satisfy "even?".</span></p></td></tr><tr><td><p><span class="RktOut"></span></p></td></tr><tr><td><p><span class="RktOut"></span><span class="hspace"> </span><span class="RktOut">At line 3 column 0</span></p></td></tr></table></td></tr></table></blockquote></div></p><p class="SHistory">Changed in version 1.1 of package <span class="stt">htdp-lib</span>: allow the above examples to run in BSL and BSL+</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._test-engine/racket-tests..rkt)._check-within))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-within%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">check-within</a></span></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="hspace"> </span><span class="RktVar">expected-expr</span><span class="hspace"> </span><span class="RktVar">delta-expr</span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="stt"> </span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">delta-expr</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=number-types.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._number%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">number?</a></span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Checks whether the value of the <span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._test%29%29" class="RktStxLink" data-pltdoc="x">test</a></span> expression is structurally
equal to the value produced by the <span class="RktSym">expected</span> expression; every
number in the first expression must be within <span class="RktSym">delta</span> of the
corresponding number in the second expression.</div></p><p>It is an error for <span class="RktVar">expr</span> or <span class="RktSym">expected</span> to produce a function
value.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._test-engine/racket-tests..rkt)._check-error))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-error%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">check-error</a></span></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="RktPn">(</span><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-error%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">check-error</a></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="hspace"> </span><span class="RktVar">msg-expr</span><span class="RktPn">)</span></td></tr><tr><td><span class="stt"> </span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">msg-expr</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">string?</a></span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Checks that evaluating <span class="RktVar">expr</span> signals an error, where
the error message matches the string (if any).</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._test-engine/racket-tests..rkt)._check-member-of))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-member-of%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">check-member-of</a></span></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="hspace"> </span><span class="RktVar">expected-expr</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Checks whether the value of the <span class="RktVar">expr</span> expression is <span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._equal%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">equal?</a></span>
to any of the values produced by the <span class="RktVar">expected-expr</span>s.</div></p><p>It is an error for <span class="RktVar">expr</span> or any of the <span class="RktVar">expected-expr</span>s
to produce a function value or an inexact number.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._test-engine/racket-tests..rkt)._check-range))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._check-range%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">check-range</a></span></span><span class="hspace"> </span><span class="RktVar">expr</span><span class="hspace"> </span><span class="RktVar">min-expr</span><span class="hspace"> </span><span class="RktVar">max-expr</span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="stt"> </span></td></tr><tr><td><blockquote class="SubFlow"><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">expr</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=number-types.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._number%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">number?</a></span></td></tr></table><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">min-expr</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=number-types.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._number%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">number?</a></span></td></tr></table><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td><span class="hspace"> </span></td><td><span class="RktVar">max-expr</span></td><td><span class="hspace"> </span></td><td>:</td><td><span class="hspace"> </span></td><td><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=number-types.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._number%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">number?</a></span></td></tr></table></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Checks whether value of <span class="RktVar">expr</span> is between the values of
<span class="RktVar">min-expr</span> and <span class="RktVar">max-expr</span> inclusive.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>syntax</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(form._((lib._test-engine/racket-tests..rkt)._test))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28form._%28%28lib._test-engine%2Fracket-tests..rkt%29._test%29%29" class="RktStxDef RktStxLink" data-pltdoc="x">test</a></span></span><span class="RktPn">)</span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Runs all of the tests specified by check forms in the current module
and reports the results. When using the gui module, the results are
provided in a separate window, otherwise the results are printed to
the current output port.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>parameter</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._test-engine/racket-tests..rkt)._test-format))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-format%29%29" class="RktValDef RktValLink" data-pltdoc="x">test-format</a></span></span><span class="RktPn"></span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="prototype"><tr><td valign="top"><span class="hspace"> </span></td><td valign="top">→</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="RktPn">(</span><span class="RktSym">or/c</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><span class="nobreak">-></span></span><span class="hspace"> </span><span class="RktSym">any/c</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">or/c</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">is-a?/c</span><span class="hspace"> </span><span class="RktSym">snip%</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><span class="nobreak">-></span></span><span class="hspace"> </span><span class="RktSym">any/c</span><span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._output-port%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">output-port?</a></span><span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">void?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td></tr></table></td></tr><tr><td><span class="RktPn">(</span><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-format%29%29" class="RktValDef RktValLink" data-pltdoc="x">test-format</a></span></span><span class="hspace"> </span><span class="RktVar">format</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">void?</a></span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">format</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">:</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><table cellspacing="0" cellpadding="0" class="RktBlk"><tr><td><span class="RktPn">(</span><span class="RktSym">or/c</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><span class="nobreak">-></span></span><span class="hspace"> </span><span class="RktSym">any/c</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">or/c</span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym">is-a?/c</span><span class="hspace"> </span><span class="RktSym">snip%</span><span class="RktPn">)</span><span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=strings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._string%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">string?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><span class="nobreak">-></span></span><span class="hspace"> </span><span class="RktSym">any/c</span><span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._output-port%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">output-port?</a></span><span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">void?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></td></tr></table></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">A parameter that stores the formatting function for the values tested
by the check forms.</div></p><p>If the parameter is a function of two arguments, then it is supplied the value
and an output port to render the value to. Otherwise, if it is a function of one
argument, then the resulting string is used to render the value.</p><p>The default value accepts two arguments and <span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=Writing.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._print%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">print</a></span>s the <span class="RktSym">any/c</span>
argument to the given port.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>parameter</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._test-engine/racket-tests..rkt)._test-silence))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-silence%29%29" class="RktValDef RktValLink" data-pltdoc="x">test-silence</a></span></span><span class="RktPn"></span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._boolean%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr><tr><td><span class="RktPn">(</span><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-silence%29%29" class="RktValDef RktValLink" data-pltdoc="x">test-silence</a></span></span><span class="hspace"> </span><span class="RktVar">silence?</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">void?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">silence?</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">any/c</a></span></td></tr></table></blockquote></div><div class="SIntrapara">A parameter that stores a boolean, defaults to #f, that can be used to
suppress the printed summary from test.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>parameter</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._test-engine/racket-tests..rkt)._test-execute))"></a><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-execute%29%29" class="RktValDef RktValLink" data-pltdoc="x">test-execute</a></span></span><span class="RktPn"></span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._boolean%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr><tr><td><span class="RktPn">(</span><span title="Provided from: test-engine/racket-tests | Package: htdp-lib"><span class="RktSym"><a href="#%28def._%28%28lib._test-engine%2Fracket-tests..rkt%29._test-execute%29%29" class="RktValDef RktValLink" data-pltdoc="x">test-execute</a></span></span><span class="hspace"> </span><span class="RktVar">execute?</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">void?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">execute?</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.7" class="RktValLink Sq" data-pltdoc="x">any/c</a></span></td></tr></table></blockquote></div><div class="SIntrapara">A parameter that stores a boolean, defaults to #t, that can be used to
suppress evaluation of test expressions.</div></p><h3 x-source-module="(lib "test-engine/test-engine.scrbl")" x-source-pkg="htdp-doc" x-part-tag=""GUI_Interface"">2<tt> </tt><a name="(part._.G.U.I_.Interface)"></a><a name="(mod-path._test-engine/racket-gui)"></a>GUI Interface</h3><p><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="https://download.racket-lang.org/docs/6.7/html/local-redirect/index.html?doc=reference&rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&version=6.7" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="#%28mod-path._test-engine%2Fracket-gui%29" class="RktModLink" data-pltdoc="x"><span class="RktSym">test-engine/racket-gui</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">htdp-lib</span></span></td></tr></table></p><p>This module requires produces an independent window when
displaying test results. It provides the same bindings as
<span class="RktSym">test-engine/racket-tests</span>.</p><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.7", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.7");">top</a></span><span class="navright"> <span class="nonavigation">← prev</span> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.7");">up</a> <span class="nonavigation">next →</span></span> </div></div></div><div id="contextindicator"> </div></body></html>
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