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CartesianProduct.php
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CartesianProduct.php
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<?php
declare(strict_types=1);
/**
* Hoa
*
*
* @license
*
* New BSD License
*
* Copyright © 2007-2018, Hoa community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Hoa nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
namespace Hoa\Math\Test\Unit\Combinatorics\Combination;
use Hoa\Math\Combinatorics\Combination\CartesianProduct as CUT;
use Hoa\Test;
/**
* Class \Hoa\Math\Test\Unit\Combinatorics\Combination\CartesianProduct.
*
* Test suite of the cartesian product.
*
* @license New BSD License
*/
class CartesianProduct extends Test\Unit\Suite
{
public function case_empty(): void
{
$this
->given($iterator = new CUT([]))
->when($result = iterator_to_array($iterator))
->then
->array($result)
->isEqualTo([[null]]);
}
public function case_X(): void
{
$this
->given($iterator = new CUT([1, 2, 3]))
->when($result = iterator_to_array($iterator))
->then
->array($result)
->isEqualTo([
[1],
[2],
[3]
]);
}
public function case_X_Y(): void
{
$this
->given($iterator = new CUT([1, 2, 3], [4, 5, 6]))
->when($result = iterator_to_array($iterator))
->then
->array($result)
->isEqualTo([
[1, 4],
[2, 4],
[3, 4],
[1, 5],
[2, 5],
[3, 5],
[1, 6],
[2, 6],
[3, 6]
]);
}
public function case_X_Y_Z(): void
{
$this
->given($iterator = new CUT([1, 2, 3], [4, 5, 6], [7, 8, 9]))
->when($result = iterator_to_array($iterator))
->then
->array($result)
->isEqualTo([
[1, 4, 7],
[2, 4, 7],
[3, 4, 7],
[1, 5, 7],
[2, 5, 7],
[3, 5, 7],
[1, 6, 7],
[2, 6, 7],
[3, 6, 7],
[1, 4, 8],
[2, 4, 8],
[3, 4, 8],
[1, 5, 8],
[2, 5, 8],
[3, 5, 8],
[1, 6, 8],
[2, 6, 8],
[3, 6, 8],
[1, 4, 9],
[2, 4, 9],
[3, 4, 9],
[1, 5, 9],
[2, 5, 9],
[3, 5, 9],
[1, 6, 9],
[2, 6, 9],
[3, 6, 9]
]);
}
}