libstdc++-v3/docs/html/ext/pb_ds/pq_regression_tests.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   2     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
   3
   4 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
   5 <head>
   6   <meta name="generator" content=
   7   "HTML Tidy for Linux/x86 (vers 12 April 2005), see www.w3.org" />
   8
   9   <title>Priority-Queue Regression Tests</title>
  10   <meta http-equiv="Content-Type" content=
  11   "text/html; charset=us-ascii" />
  12   </head>
  13
  14 <body>
  15   <div id="page">
  16     <h1>Priority-Queue Regression Tests</h1>
  17
  18     <h2><a name="assoc_desc" id="assoc_desc">Description</a></h2>
  19
  20     <p>The library contains a single comprehensive regression test.
  21     For a given container type in <tt>pb_ds</tt>, the test creates
  22     an object of the container type and an object of the
  23     corresponding STL type (<i>i.e.</i>,
  24     <tt>std::priority_queue</tt>). It then performs a random
  25     sequence of methods with random arguments (<i>e.g.</i>, pushes,
  26     pops, and so forth) on both objects. At each operation, the
  27     test checks the return value of the method, and optionally both
  28     compares <tt>pb_ds</tt>'s object with the STL's object as well
  29     as performing other consistency checks on <tt>pb_ds</tt>'s
  30     object (<i>e.g.</i>, that the size returned by the
  31     <tt>size</tt> method corresponds to the distance between its
  32     <tt>begin</tt> and end iterators).</p>
  33
  34     <p>Additionally, the test integrally checks exception safety
  35     and resource leaks. This is done as follows. A special
  36     allocator type, written for the purpose of the test, both
  37     randomly throws an exceptions when allocations are performed,
  38     and tracks allocations and de-allocations. The exceptions thrown
  39     at allocations simulate memory-allocation failures; the
  40     tracking mechanism checks for memory-related bugs (<i>e.g.</i>,
  41     resource leaks and multiple de-allocations). Both
  42     <tt>pb_ds</tt>'s containers and the containers' value-types are
  43     configured to use this allocator.</p>
  44
  45     <h2><a name="pq_tests" id="pq_tests">Tests</a></h2>
  46
  47     <p><a href=
  48     "../../../../testsuite/ext/pb_ds/regression/priority_queue_rand.cc"><tt>priority_queue_rand.cc</tt></a>
  49     checks all priority queue types.</p>
  50   </div>
  51 </body>
  52 </html>