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algorithm/test/ordered_test.cpp

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// Copyright (c) 2010 Nuovation System Designs, LLC
// Grant Erickson <gerickson@nuovations.com>
//
// Reworked by Marshall Clow; August 2010
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/ for latest version.
#include <algorithm>
#include <iostream>
#include <boost/algorithm/cxx11/is_sorted.hpp>
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>
using namespace boost;
/* Preprocessor Defines */
#define elementsof(v) (sizeof (v) / sizeof (v[0]))
#define a_begin(v) (&v[0])
#define a_end(v) (v + elementsof (v))
#define a_range(v) v
#define b_e(v) a_begin(v),a_end(v)
namespace ba = boost::algorithm;
static void
test_ordered(void)
{
const int strictlyIncreasingValues[] = { 1, 2, 3, 4, 5 };
const int randomValues[] = { 3, 6, 1, 2, 7 };
const int constantValues[] = { 1, 2, 2, 2, 5 };
int nonConstantArray[] = { 1, 2, 2, 2, 5 };
const int inOrderUntilTheEnd [] = { 0, 1, 2, 3, 4, 5, 6, 7, 6 };
// Begin/end checks
BOOST_CHECK ( ba::is_sorted (b_e(strictlyIncreasingValues)));
BOOST_CHECK ( !ba::is_sorted (b_e(randomValues)));
BOOST_CHECK ( ba::is_sorted (b_e(strictlyIncreasingValues), std::less<int>()));
BOOST_CHECK ( !ba::is_sorted (b_e(strictlyIncreasingValues), std::greater<int>()));
// Range checks
BOOST_CHECK ( ba::is_sorted (a_range(strictlyIncreasingValues)));
BOOST_CHECK ( !ba::is_sorted (a_range(randomValues)));
BOOST_CHECK ( ba::is_sorted (a_range(strictlyIncreasingValues), std::less<int>()));
BOOST_CHECK ( !ba::is_sorted (a_range(strictlyIncreasingValues), std::greater<int>()));
BOOST_CHECK ( ba::is_sorted_until ( b_e(strictlyIncreasingValues)) == a_end(strictlyIncreasingValues));
BOOST_CHECK ( ba::is_sorted_until ( b_e(strictlyIncreasingValues), std::less<int>()) == a_end(strictlyIncreasingValues));
BOOST_CHECK ( ba::is_sorted_until ( a_range(strictlyIncreasingValues)) == boost::end(strictlyIncreasingValues));
BOOST_CHECK ( ba::is_sorted_until ( a_range(strictlyIncreasingValues), std::less<int>()) == boost::end(strictlyIncreasingValues));
// Check for const and non-const arrays
BOOST_CHECK ( ba::is_sorted_until ( b_e(constantValues), std::less<int>()) == a_end(constantValues));
BOOST_CHECK ( ba::is_sorted_until ( a_range(constantValues), std::less<int>()) == boost::end(constantValues));
BOOST_CHECK ( ba::is_sorted_until ( b_e(nonConstantArray), std::less<int>()) == a_end(nonConstantArray));
BOOST_CHECK ( ba::is_sorted_until ( a_range(nonConstantArray), std::less<int>()) == boost::end(nonConstantArray));
BOOST_CHECK ( ba::is_sorted_until ( b_e(randomValues), std::less<int>()) == &randomValues[2] );
BOOST_CHECK ( ba::is_sorted_until ( b_e(randomValues)) == &randomValues[2] );
BOOST_CHECK ( ba::is_sorted_until ( a_range(randomValues), std::less<int>()) == &randomValues[2] );
BOOST_CHECK ( ba::is_sorted_until ( a_range(randomValues)) == &randomValues[2] );
BOOST_CHECK ( ba::is_sorted_until ( a_range(inOrderUntilTheEnd), std::less<int>()) == &inOrderUntilTheEnd[8] );
BOOST_CHECK ( ba::is_sorted_until ( a_range(inOrderUntilTheEnd)) == &inOrderUntilTheEnd[8] );
// For zero and one element collections, the comparison predicate should never be called
BOOST_CHECK ( ba::is_sorted_until ( a_begin(randomValues), a_begin(randomValues), std::equal_to<int>()) == a_begin(randomValues));
BOOST_CHECK ( ba::is_sorted_until ( a_begin(randomValues), a_begin(randomValues)) == a_begin(randomValues));
BOOST_CHECK ( ba::is_sorted_until ( a_begin(randomValues), a_begin(randomValues) + 1, std::equal_to<int>()) == a_begin(randomValues) + 1);
BOOST_CHECK ( ba::is_sorted_until ( a_begin(randomValues), a_begin(randomValues) + 1 ) == a_begin(randomValues) + 1);
}
static void
test_increasing_decreasing(void)
{
const int strictlyIncreasingValues[] = { 1, 2, 3, 4, 5 };
const int strictlyDecreasingValues[] = { 9, 8, 7, 6, 5 };
const int increasingValues[] = { 1, 2, 2, 2, 5 };
const int decreasingValues[] = { 9, 7, 7, 7, 5 };
const int randomValues[] = { 3, 6, 1, 2, 7 };
const int constantValues[] = { 7, 7, 7, 7, 7 };
// Test a strictly increasing sequence
BOOST_CHECK ( ba::is_strictly_increasing (b_e(strictlyIncreasingValues)));
BOOST_CHECK ( ba::is_increasing (b_e(strictlyIncreasingValues)));
BOOST_CHECK ( !ba::is_strictly_decreasing (b_e(strictlyIncreasingValues)));
BOOST_CHECK ( !ba::is_decreasing (b_e(strictlyIncreasingValues)));
BOOST_CHECK ( ba::is_strictly_increasing (a_range(strictlyIncreasingValues)));
BOOST_CHECK ( ba::is_increasing (a_range(strictlyIncreasingValues)));
BOOST_CHECK ( !ba::is_strictly_decreasing (a_range(strictlyIncreasingValues)));
BOOST_CHECK ( !ba::is_decreasing (a_range(strictlyIncreasingValues)));
// Test a strictly decreasing sequence
BOOST_CHECK ( !ba::is_strictly_increasing (b_e(strictlyDecreasingValues)));
BOOST_CHECK ( !ba::is_increasing (b_e(strictlyDecreasingValues)));
BOOST_CHECK ( ba::is_strictly_decreasing (b_e(strictlyDecreasingValues)));
BOOST_CHECK ( ba::is_decreasing (b_e(strictlyDecreasingValues)));
// Test an increasing sequence
BOOST_CHECK ( !ba::is_strictly_increasing (b_e(increasingValues)));
BOOST_CHECK ( ba::is_increasing (b_e(increasingValues)));
BOOST_CHECK ( !ba::is_strictly_decreasing (b_e(increasingValues)));
BOOST_CHECK ( !ba::is_decreasing (b_e(increasingValues)));
// Test a decreasing sequence
BOOST_CHECK ( !ba::is_strictly_increasing (b_e(decreasingValues)));
BOOST_CHECK ( !ba::is_increasing (b_e(decreasingValues)));
BOOST_CHECK ( !ba::is_strictly_decreasing (b_e(decreasingValues)));
BOOST_CHECK ( ba::is_decreasing (b_e(decreasingValues)));
// Test a random sequence
BOOST_CHECK ( !ba::is_strictly_increasing (b_e(randomValues)));
BOOST_CHECK ( !ba::is_increasing (b_e(randomValues)));
BOOST_CHECK ( !ba::is_strictly_decreasing (b_e(randomValues)));
BOOST_CHECK ( !ba::is_decreasing (b_e(randomValues)));
// Test a constant sequence
BOOST_CHECK ( !ba::is_strictly_increasing (b_e(constantValues)));
BOOST_CHECK ( ba::is_increasing (b_e(constantValues)));
BOOST_CHECK ( !ba::is_strictly_decreasing (b_e(constantValues)));
BOOST_CHECK ( ba::is_decreasing (b_e(constantValues)));
// Test an empty sequence
BOOST_CHECK ( ba::is_strictly_increasing (strictlyIncreasingValues, strictlyIncreasingValues));
BOOST_CHECK ( ba::is_increasing (strictlyIncreasingValues, strictlyIncreasingValues));
BOOST_CHECK ( ba::is_strictly_decreasing (strictlyIncreasingValues, strictlyIncreasingValues));
BOOST_CHECK ( ba::is_decreasing (strictlyIncreasingValues, strictlyIncreasingValues));
// Test a one-element sequence
BOOST_CHECK ( ba::is_strictly_increasing (strictlyIncreasingValues, strictlyIncreasingValues+1));
BOOST_CHECK ( ba::is_increasing (strictlyIncreasingValues, strictlyIncreasingValues+1));
BOOST_CHECK ( ba::is_strictly_decreasing (strictlyIncreasingValues, strictlyIncreasingValues+1));
BOOST_CHECK ( ba::is_decreasing (strictlyIncreasingValues, strictlyIncreasingValues+1));
// Test a two-element sequence
BOOST_CHECK ( ba::is_strictly_increasing (strictlyIncreasingValues, strictlyIncreasingValues+2));
BOOST_CHECK ( ba::is_increasing (strictlyIncreasingValues, strictlyIncreasingValues+2));
BOOST_CHECK ( !ba::is_strictly_decreasing (strictlyIncreasingValues, strictlyIncreasingValues+2));
BOOST_CHECK ( !ba::is_decreasing (strictlyIncreasingValues, strictlyIncreasingValues+2));
}
BOOST_AUTO_TEST_CASE( test_main )
{
test_ordered ();
test_increasing_decreasing ();
}
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