VectorTest.php
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	<?php
	declare(strict_types=1);

	namespace Keruald\OmniTools\Tests\Collections;

	use Keruald\OmniTools\Collections\Vector;

	use PHPUnit\Framework\TestCase;

	use InvalidArgumentException;
	use IteratorAggregate;
	use Traversable;

	class VectorTest extends TestCase {

	private Vector $vector;

	protected function setUp () : void {
	$this->vector = new Vector([1, 2, 3, 4, 5]);
	}

	public function testConstructorWithIterable () : void {
	$iterable = new class implements IteratorAggregate {
	public function getIterator () : Traversable {
	yield 42;
	yield 100;
	}
	};

	$vector = new Vector($iterable);
	$this->assertEquals([42, 100], $vector->toArray());
	}

	public function testFrom () : void {
	$this->assertEquals([42, 100], Vector::from([42, 100])->toArray());
	}

	public function testGet () : void {
	$vector = new Vector(["a", "b", "c"]);

	$this->assertEquals("b", $vector->get(1));
	}

	public function testGetOverflow () : void {
	$this->expectException(InvalidArgumentException::class);

	$this->vector->get(800);
	}

	public function testGetOr () : void {
	$vector = new Vector(["a", "b", "c"]);

	$this->assertEquals("X", $vector->getOr(800, "X"));
	}

	public function testSet () : void {
	$vector = new Vector(["a", "b", "c"]);
	$vector->set(1, "x"); // should replace "b"

	$this->assertEquals(["a", "x", "c"], $vector->toArray());
	}

	public function testContains () : void {
	$this->assertTrue($this->vector->contains(2));
	$this->assertFalse($this->vector->contains(666));
	}

	public function testCount () : void {
	$this->assertEquals(5, $this->vector->count());
	$this->assertEquals(0, (new Vector)->count());
	}

	public function testClear () : void {
	$this->vector->clear();

	$this->assertEquals(0, $this->vector->count());
	}

	public function testAppend () : void {
	$this->vector->append([6, 7, 8]);

	$this->assertEquals([1, 2, 3, 4, 5, 6, 7 ,8], $this->vector->toArray());
	}

	public function testUpdate () : void {
	$this->vector->update([5, 5, 5, 6, 7, 8]); // 5 already exists

	$this->assertEquals([1, 2, 3, 4, 5, 6, 7 ,8], $this->vector->toArray());
	}


	public function testMap () : void {
	$actual = $this->vector
	->map(function ($x) { return $x * $x; })
	->toArray();

	$this->assertEquals([1, 4, 9, 16, 25], $actual);
	}

	public function testMapKeys () : void {
	$vector = new Vector(["foo", "bar", "quux", "xizzy"]);

	$filter = function ($key) {
	return 0; // Let's collapse our array
	};

	$actual = $vector->mapKeys($filter)->toArray();
	$this->assertEquals(["xizzy"], $actual);

	}

	public function testFilter () : void {
	$vector = new Vector(["foo", "bar", "quux", "xizzy"]);

	$filter = function ($item) {
	return strlen($item) === 3; // Let's keep 3-letters words
	};

	$actual = $vector->filter($filter)->toArray();
	$this->assertEquals(["foo", "bar"], $actual);
	}

	public function testFilterWithBadCallback () : void {
	$this->expectException(InvalidArgumentException::class);

	$badFilter = function () {};

	$this->vector->filter($badFilter);
	}

	public function testFilterKeys () : void {
	$filter = function ($key) {
	return $key % 2 === 0; // Let's keep even indices
	};

	$actual = $this->vector
	->filterKeys($filter)
	->toArray();

	$this->assertEquals([0, 2, 4], array_keys($actual));
	}

	public function testImplode() : void {
	$actual = (new Vector(["a", "b", "c"]))
	->implode(".")
	->__toString();

	$this->assertEquals("a.b.c", $actual);
	}

	public function testImplodeWithoutDelimiter() : void {
	$actual = (new Vector(["a", "b", "c"]))
	->implode("")
	->__toString();

	$this->assertEquals("abc", $actual);
	}

	public function testExplode() : void {
	$actual = Vector::explode(".", "a.b.c");

	$this->assertEquals(["a", "b", "c"], $actual->toArray());
	}

	public function testExplodeWithoutDelimiter() : void {
	$actual = Vector::explode("", "a.b.c");

	$this->assertEquals(["a.b.c"], $actual->toArray());
	}

	}

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