SizeTest.php
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SizeTest.php
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	<?php
	namespace Eris\Quantifier;

	class SizeTest extends \PHPUnit\Framework\TestCase
	{
	public function testProducesAListOfSizesIncreasingThemTriangularly()
	{
	$size = Size::withTriangleGrowth(1000);
	$this->assertEquals(0, $size->at(0));
	$this->assertEquals(1, $size->at(1));
	$this->assertEquals(3, $size->at(2));
	$this->assertEquals(6, $size->at(3));
	$this->assertEquals(10, $size->at(4));
	}

	public function testCyclesThroughAvailableSizesWhenTheyAreFinished()
	{
	$size = Size::withTriangleGrowth(1000);
	\Eris\PHPUnitDeprecationHelper::assertIsInt($size->at(42000));
	}

	public function testAllowsLinearGrowth()
	{
	$size = Size::withLinearGrowth(1000);
	$this->assertEquals(0, $size->at(0));
	$this->assertEquals(1, $size->at(1));
	$this->assertEquals(2, $size->at(2));
	$this->assertEquals(3, $size->at(3));
	$this->assertEquals(4, $size->at(4));
	}

	public static function limits()
	{
	return [
	[2],
	[5],
	[10],
	[20],
	[100],
	[10000],
	];
	}

	/**
	* @dataProvider limits
	*/
	public function testCoversAUniformSubsetWhenLimitedToTheNumberOfIterations($limit)
	{
	$size = Size::withTriangleGrowth(1000)
	->limit($limit);
	$this->assertEquals($limit, count($size));
	$this->assertEquals(0, $size->at(0));
	$this->assertEquals(990, $size->at($limit - 1));
	$this->assertEquals(0, $size->at($limit));
	}
	}