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    <h1>Priority-Queue Regression Tests</h1>

    <h2><a name="assoc_desc" id="assoc_desc">Description</a></h2>

    <p>The library contains a single comprehensive regression test.
    For a given container type in <tt>pb_ds</tt>, the test creates
    an object of the container type and an object of the
    corresponding STL type (<i>i.e.</i>,
    <tt>std::priority_queue</tt>). It then performs a random
    sequence of methods with random arguments (<i>e.g.</i>, pushes,
    pops, and so forth) on both objects. At each operation, the
    test checks the return value of the method, and optionally both
    compares <tt>pb_ds</tt>'s object with the STL's object as well
    as performing other consistency checks on <tt>pb_ds</tt>'s
    object (<i>e.g.</i>, that the size returned by the
    <tt>size</tt> method corresponds to the distance between its
    <tt>begin</tt> and end iterators).</p>

    <p>Additionally, the test integrally checks exception safety
    and resource leaks. This is done as follows. A special
    allocator type, written for the purpose of the test, both
    randomly throws an exceptions when allocations are performed,
    and tracks allocations and de-allocations. The exceptions thrown
    at allocations simulate memory-allocation failures; the
    tracking mechanism checks for memory-related bugs (<i>e.g.</i>,
    resource leaks and multiple de-allocations). Both
    <tt>pb_ds</tt>'s containers and the containers' value-types are
    configured to use this allocator.</p>

    <h2><a name="pq_tests" id="pq_tests">Tests</a></h2>

    <p><a href=
    "http://gcc.gnu.org/viewcvs/*checkout*/trunk/libstdc%2B%2B-v3/testsuite/ext/pb_ds/regression/priority_queue_rand.cc"><tt>priority_queue_rand.cc</tt></a>
    checks all priority queue types.</p>
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