DateGeneratorTest.php
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DateGeneratorTest.php
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	<?php
	namespace Eris\Generator;

	use DateTime;
	use Eris\Random\RandomRange;
	use Eris\Random\RandSource;

	class DateGeneratorTest extends \PHPUnit\Framework\TestCase
	{
	/**
	* @var int
	*/
	private $size;
	/**
	* @var RandomRange
	*/
	private $rand;

	protected function setUp(): void
	{
	$this->size = 10;
	$this->rand = new RandomRange(new RandSource());
	}

	public function testGenerateDateTimeObjectsInTheGivenInterval()
	{
	$generator = new DateGenerator(
	new DateTime("2014-01-01T00:00:00"),
	new DateTime("2014-01-02T23:59:59")
	);
	$value = $generator($this->size, $this->rand);
	$this->assertInstanceOf('DateTime', $value->unbox());
	}

	public function testDateTimeShrinkGeometrically()
	{
	$generator = new DateGenerator(
	new DateTime("2014-01-01T00:00:00"),
	new DateTime("2014-01-02T23:59:59")
	);
	$this->assertEquals(
	new DateTime("2014-01-01T16:00:00"),
	$generator->shrink(GeneratedValueSingle::fromJustValue(
	new DateTime("2014-01-02T08:00:00"),
	'date'
	))->unbox()
	);
	}

	public function testTheLowerLimitIsTheFixedPointOfShrinking()
	{
	$generator = new DateGenerator(
	$lowerLimit = new DateTime("2014-01-01T00:00:00"),
	new DateTime("2014-01-02T23:59:59")
	);
	$value = GeneratedValueSingle::fromJustValue(
	new DateTime("2014-01-01T00:01:00"),
	'date'
	);
	for ($i = 0; $i < 10; $i++) {
	$value = $generator->shrink($value);
	}
	$this->assertEquals(
	$lowerLimit,
	$value->unbox()
	);
	}
	}