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98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
//
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// RandomStreamTest.cpp
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//
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// $Id: //poco/1.4/Foundation/testsuite/src/RandomStreamTest.cpp#1 $
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "RandomStreamTest.h"
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#include "CppUnit/TestCaller.h"
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#include "CppUnit/TestSuite.h"
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#include "Poco/RandomStream.h"
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#include <vector>
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#include <cmath>
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using Poco::RandomInputStream;
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RandomStreamTest::RandomStreamTest(const std::string& name): CppUnit::TestCase(name)
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{
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}
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RandomStreamTest::~RandomStreamTest()
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{
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}
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void RandomStreamTest::testStream()
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{
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RandomInputStream rnd;
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const int n = 16;
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std::vector<int> d(n, 0);
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for (int i = 0; i < 1000; ++i)
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{
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unsigned char c;
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rnd >> c;
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d[c & 0x0F]++;
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d[(c >> 4) & 0x0F]++;
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}
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int sum = 0;
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for (int k = 0; k < n; ++k) sum += d[k];
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int avg = sum/n;
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int var = 0;
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for (int k = 0; k < n; ++k) var += (d[k] - avg)*(d[k] - avg);
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var /= n;
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int sd = int(std::sqrt((double) var));
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assert (110 < avg && avg < 140);
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assert (sd < 20);
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}
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void RandomStreamTest::setUp()
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{
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}
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void RandomStreamTest::tearDown()
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{
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}
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CppUnit::Test* RandomStreamTest::suite()
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{
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CppUnit::TestSuite* pSuite = new CppUnit::TestSuite("RandomStreamTest");
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CppUnit_addTest(pSuite, RandomStreamTest, testStream);
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return pSuite;
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}
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