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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 ArrayIterator;
use ArrayObject;
use EmptyIterator;
use Generator;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\Attributes\Small;
use PHPUnit\Framework\Exception;
use PHPUnit\Framework\ExpectationFailedException;
use PHPUnit\Framework\GeneratorNotSupportedException;
use PHPUnit\Framework\TestCase;
use PHPUnit\TestFixture\ExceptionThrowingIteratorAggregate;
use PHPUnit\TestFixture\TestIterator;
use PHPUnit\TestFixture\TestIterator2;
use PHPUnit\TestFixture\TestIteratorAggregate;
use PHPUnit\TestFixture\TestIteratorAggregate2;
#[CoversClass(Count::class)]
#[CoversClass(Constraint::class)]
#[Small]
final class CountTest extends TestCase
{
public static function provider(): array
{
return [
[
true,
'',
0,
[],
],
[
true,
'',
1,
['value'],
],
[
true,
'',
0,
new EmptyIterator,
],
[
true,
'',
5,
new ArrayObject([1, 2, 3, 4, 5]),
],
[
true,
'',
1,
new ArrayIterator(['value']),
],
[
true,
'',
2,
new TestIterator(['value', 'value']),
],
[
true,
'',
2,
new TestIteratorAggregate(new TestIterator(['value', 'value'])),
],
[
true,
'',
2,
new TestIteratorAggregate2(new TestIteratorAggregate(new TestIterator(['value', 'value']))),
],
[
false,
'Failed asserting that actual size 0 matches expected size 1.',
1,
1,
],
];
}
#[DataProvider('provider')]
public function testCanBeEvaluated(bool $result, string $failureDescription, int $expected, mixed $actual): void
{
$constraint = new Count($expected);
$this->assertSame($result, $constraint->evaluate($actual, returnResult: true));
if ($result) {
return;
}
$this->expectException(ExpectationFailedException::class);
$this->expectExceptionMessage($failureDescription);
$constraint->evaluate($actual);
}
public function testCanBeRepresentedAsString(): void
{
$this->assertSame('count matches 1', (new Count(1))->toString());
}
public function testIsCountable(): void
{
$this->assertCount(1, (new Count(1)));
}
public function testCountDoesNotChangeIteratorKey(): void
{
$countConstraint = new Count(2);
// test with 1st implementation of Iterator
$it = new TestIterator([1, 2]);
$countConstraint->evaluate($it, returnResult: true);
$this->assertSame(1, $it->current());
$it->next();
$countConstraint->evaluate($it, returnResult: true);
$this->assertSame(2, $it->current());
$it->next();
$countConstraint->evaluate($it, returnResult: true);
$this->assertFalse($it->valid());
// test with 2nd implementation of Iterator
$it = new TestIterator2([1, 2]);
$countConstraint = new Count(2);
$countConstraint->evaluate($it, returnResult: true);
$this->assertSame(1, $it->current());
$it->next();
$countConstraint->evaluate($it, returnResult: true);
$this->assertSame(2, $it->current());
$it->next();
$countConstraint->evaluate($it, returnResult: true);
$this->assertFalse($it->valid());
// test with IteratorAggregate
$it = new TestIterator([1, 2]);
$ia = new TestIteratorAggregate($it);
$countConstraint = new Count(2);
$countConstraint->evaluate($ia, returnResult: true);
$this->assertSame(1, $it->current());
$it->next();
$countConstraint->evaluate($ia, returnResult: true);
$this->assertSame(2, $it->current());
$it->next();
$countConstraint->evaluate($ia, returnResult: 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, returnResult: true);
$this->assertSame(1, $it->current());
$it->next();
$countConstraint->evaluate($ia2, returnResult: true);
$this->assertSame(2, $it->current());
$it->next();
$countConstraint->evaluate($ia2, returnResult: true);
$this->assertFalse($it->valid());
}
public function testDoesNotAcceptGenerators(): void
{
$constraint = new Count(0);
$this->expectException(GeneratorNotSupportedException::class);
$constraint->evaluate($this->generator());
}
public function testWrapsExceptionFromIteratorAggregate(): void
{
$constraint = new Count(0);
$this->expectException(Exception::class);
$constraint->evaluate(new ExceptionThrowingIteratorAggregate);
}
private function generator(): Generator
{
yield 1;
}
}
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