61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/* Copyright (C) 2009 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "lib/self_test.h"
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#include "lib/rand.h"
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class TestRand : public CxxTest::TestSuite
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{
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public:
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// complain if huge interval or min > max
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void TestParam()
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{
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debug_SkipErrors(ERR::INVALID_PARAM);
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TS_ASSERT_EQUALS(rand(1, 0), size_t(0));
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TS_ASSERT_EQUALS(rand(2, ~0u), size_t(0));
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const size_t numSkipped = debug_StopSkippingErrors();
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TS_ASSERT_EQUALS(numSkipped, (size_t)2);
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}
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// returned number must be in [min, max)
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void TestReturnedRange()
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{
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for(int i = 0; i < 100; i++)
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{
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size_t min = rand(), max = min+rand();
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size_t x = rand(min, max);
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TS_ASSERT(min <= x && x < max);
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}
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}
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// make sure both possible values are hit
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void TestTwoValues()
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{
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size_t ones = 0, twos = 0;
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for(int i = 0; i < 100; i++)
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{
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size_t x = rand(1, 3);
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// paranoia: don't use array (x might not be 1 or 2 - checked below)
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if(x == 1) ones++;
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if(x == 2) twos++;
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}
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TS_ASSERT_EQUALS(ones+twos, size_t(100));
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TS_ASSERT(ones > 10 && twos > 10);
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}
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};
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