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// random_test.cpp
/* Copyright 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include <set>
#include "mongo/platform/random.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
TEST( RandomTest, Seed1 ) {
PseudoRandom a( 12 );
PseudoRandom b( 12 );
for ( int i = 0; i < 100; i++ ) {
ASSERT_EQUALS( a.nextInt32(), b.nextInt32() );
}
}
TEST( RandomTest, Seed2 ) {
PseudoRandom a( 12 );
PseudoRandom b( 12 );
for ( int i = 0; i < 100; i++ ) {
ASSERT_EQUALS( a.nextInt64(), b.nextInt64() );
}
}
TEST( RandomTest, Seed3 ) {
PseudoRandom a( 11 );
PseudoRandom b( 12 );
ASSERT_NOT_EQUALS( a.nextInt32(), b.nextInt32() );
}
TEST( RandomTest, Seed4 ) {
PseudoRandom a( 11 );
std::set<int32_t> s;
for ( int i = 0; i < 100; i++ ) {
s.insert( a.nextInt32() );
}
ASSERT_EQUALS( 100U, s.size() );
}
TEST( RandomTest, Seed5 ) {
const int64_t seed = 0xCC453456FA345FABLL;
PseudoRandom a(seed);
std::set<int32_t> s;
for ( int i = 0; i < 100; i++ ) {
s.insert( a.nextInt32() );
}
ASSERT_EQUALS( 100U, s.size() );
}
TEST( RandomTest, R1 ) {
PseudoRandom a( 11 );
std::set<int32_t> s;
for ( int i = 0; i < 100; i++ ) {
s.insert( a.nextInt32() );
}
ASSERT_EQUALS( 100U, s.size() );
}
TEST( RandomTest, R2 ) {
PseudoRandom a( 11 );
std::set<int64_t> s;
for ( int i = 0; i < 100; i++ ) {
s.insert( a.nextInt64() );
}
ASSERT_EQUALS( 100U, s.size() );
}
TEST( RandomTest, Secure1 ) {
SecureRandom* a = SecureRandom::create();
SecureRandom* b = SecureRandom::create();
for ( int i = 0; i< 100; i++ ) {
ASSERT_NOT_EQUALS( a->nextInt64(), b->nextInt64() );
}
delete a;
delete b;
}
}
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