php-ml/tests/Math/SetTest.php

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<?php
declare(strict_types=1);
namespace Phpml\Tests\Math;
use Phpml\Math\Set;
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use PHPUnit\Framework\TestCase;
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class SetTest extends TestCase
{
public function testUnion(): void
{
$union = Set::union(new Set([3, 1]), new Set([3, 2, 2]));
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self::assertEquals(new Set([1, 2, 3]), $union);
self::assertEquals(3, $union->cardinality());
}
public function testIntersection(): void
{
$intersection = Set::intersection(new Set(['C', 'A']), new Set(['B', 'C']));
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self::assertEquals(new Set(['C']), $intersection);
self::assertEquals(1, $intersection->cardinality());
}
public function testDifference(): void
{
$difference = Set::difference(new Set(['C', 'A', 'B']), new Set(['A']));
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self::assertEquals(new Set(['B', 'C']), $difference);
self::assertEquals(2, $difference->cardinality());
}
public function testPower(): void
{
$power = Set::power(new Set(['A', 'B']));
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self::assertEquals([new Set(), new Set(['A']), new Set(['B']), new Set(['A', 'B'])], $power);
self::assertCount(4, $power);
}
public function testCartesian(): void
{
$cartesian = Set::cartesian(new Set(['A']), new Set([1, 2]));
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self::assertEquals([new Set(['A', 1]), new Set(['A', 2])], $cartesian);
self::assertCount(2, $cartesian);
}
public function testContains(): void
{
$set = new Set(['B', 'A', 2, 1]);
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self::assertTrue($set->contains('B'));
self::assertTrue($set->containsAll(['A', 'B']));
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self::assertFalse($set->contains('C'));
self::assertFalse($set->containsAll(['A', 'B', 'C']));
}
public function testRemove(): void
{
$set = new Set(['B', 'A', 2, 1]);
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self::assertEquals((new Set([1, 2, 2, 2, 'B']))->toArray(), $set->remove('A')->toArray());
}
public function testAdd(): void
{
$set = new Set(['B', 'A', 2, 1]);
$set->addAll(['foo', 'bar']);
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self::assertEquals(6, $set->cardinality());
}
public function testEmpty(): void
{
$set = new Set([1, 2]);
$set->removeAll([2, 1]);
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self::assertEquals(new Set(), $set);
self::assertTrue($set->isEmpty());
}
public function testToArray(): void
{
$set = new Set([1, 2, 2, 3, 'A', false, '', 1.1, -1, -10, 'B']);
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self::assertEquals([-10, '', -1, 'A', 'B', 1, 1.1, 2, 3], $set->toArray());
}
}