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<?php declare(strict_types=1);
/*
* This file is part of PHPUnit.
*
* (c) Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace PHPUnit\Framework\Constraint;
use DatePeriod;
use EmptyIterator;
use Iterator;
use IteratorAggregate;
use PHPUnit\Framework\ExpectationFailedException;
use PHPUnit\Framework\TestFailure;
use PHPUnit\TestFixture\TestGeneratorMaker;
use PHPUnit\TestFixture\TestIterator;
use PHPUnit\TestFixture\TestIterator2;
use PHPUnit\TestFixture\TestIteratorAggregate;
use PHPUnit\TestFixture\TestIteratorAggregate2;
use Traversable;
/**
* @small
*/
final class CountTest extends ConstraintTestCase
{
public function testCount(): void
{
$countConstraint = new Count(3);
$this->assertTrue($countConstraint->evaluate([1, 2, 3], '', true));
$countConstraint = new Count(0);
$this->assertTrue($countConstraint->evaluate([], '', true));
$countConstraint = new Count(2);
$it = new TestIterator([1, 2]);
$ia = new TestIteratorAggregate($it);
$ia2 = new TestIteratorAggregate2($ia);
$this->assertTrue($countConstraint->evaluate($it, '', true));
$this->assertTrue($countConstraint->evaluate($ia, '', true));
$this->assertTrue($countConstraint->evaluate($ia2, '', true));
}
public function testCountDoesNotChangeIteratorKey(): void
{
$countConstraint = new Count(2);
// test with 1st implementation of Iterator
$it = new TestIterator([1, 2]);
$countConstraint->evaluate($it, '', true);
$this->assertEquals(1, $it->current());
$it->next();
$countConstraint->evaluate($it, '', true);
$this->assertEquals(2, $it->current());
$it->next();
$countConstraint->evaluate($it, '', true);
$this->assertFalse($it->valid());
// test with 2nd implementation of Iterator
$it = new TestIterator2([1, 2]);
$countConstraint = new Count(2);
$countConstraint->evaluate($it, '', true);
$this->assertEquals(1, $it->current());
$it->next();
$countConstraint->evaluate($it, '', true);
$this->assertEquals(2, $it->current());
$it->next();
$countConstraint->evaluate($it, '', true);
$this->assertFalse($it->valid());
// test with IteratorAggregate
$it = new TestIterator([1, 2]);
$ia = new TestIteratorAggregate($it);
$countConstraint = new Count(2);
$countConstraint->evaluate($ia, '', true);
$this->assertEquals(1, $it->current());
$it->next();
$countConstraint->evaluate($ia, '', true);
$this->assertEquals(2, $it->current());
$it->next();
$countConstraint->evaluate($ia, '', true);
$this->assertFalse($it->valid());
// test with nested IteratorAggregate
$it = new TestIterator([1, 2]);
$ia = new TestIteratorAggregate($it);
$ia2 = new TestIteratorAggregate2($ia);
$countConstraint = new Count(2);
$countConstraint->evaluate($ia2, '', true);
$this->assertEquals(1, $it->current());
$it->next();
$countConstraint->evaluate($ia2, '', true);
$this->assertEquals(2, $it->current());
$it->next();
$countConstraint->evaluate($ia2, '', true);
$this->assertFalse($it->valid());
}
public function testCountGeneratorsDoNotRewind(): void
{
$generatorMaker = new TestGeneratorMaker;
$countConstraint = new Count(3);
$generator = $generatorMaker->create([1, 2, 3]);
$this->assertEquals(1, $generator->current());
$countConstraint->evaluate($generator, '', true);
$this->assertEquals(null, $generator->current());
$countConstraint = new Count(2);
$generator = $generatorMaker->create([1, 2, 3]);
$this->assertEquals(1, $generator->current());
$generator->next();
$this->assertEquals(2, $generator->current());
$countConstraint->evaluate($generator, '', true);
$this->assertEquals(null, $generator->current());
$countConstraint = new Count(1);
$generator = $generatorMaker->create([1, 2, 3]);
$this->assertEquals(1, $generator->current());
$generator->next();
$this->assertEquals(2, $generator->current());
$generator->next();
$this->assertEquals(3, $generator->current());
$countConstraint->evaluate($generator, '', true);
$this->assertEquals(null, $generator->current());
}
/**
* Since PHP8, Traversable cannot be implemented directly.
*
* @requires PHP < 8.0
*/
public function testCountTraversable(): void
{
$countConstraint = new Count(5);
// DatePeriod is used as an object that is Traversable but does not
// implement Iterator or IteratorAggregate. The following ISO 8601
// recurring time interval will yield five total DateTime objects.
$datePeriod = new DatePeriod('R4/2017-05-01T00:00:00Z/P1D');
$this->assertInstanceOf(Traversable::class, $datePeriod);
$this->assertNotInstanceOf(Iterator::class, $datePeriod);
$this->assertNotInstanceOf(IteratorAggregate::class, $datePeriod);
$this->assertTrue($countConstraint->evaluate($datePeriod, '', true));
}
public function testCountCanBeExportedToString(): void
{
$countConstraint = new Count(1);
$this->assertEquals('count matches 1', $countConstraint->toString());
}
public function testCountEvaluateReturnsNullWithNonCountableAndNonTraversableOther(): void
{
$countConstraint = new Count(1);
try {
$this->assertNull($countConstraint->evaluate(1));
} catch (ExpectationFailedException $e) {
$this->assertEquals(
<<<'EOF'
Failed asserting that actual size 0 matches expected size 1.
EOF
,
TestFailure::exceptionToString($e)
);
}
}
/**
* @ticket https://github.com/sebastianbergmann/phpunit/issues/3743
*/
public function test_EmptyIterator_is_handled_correctly(): void
{
$constraint = new Count(0);
$this->assertTrue($constraint->evaluate(new EmptyIterator, '', true));
}
}
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