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当前路径：vendor/sebastian/type/tests/unit/IterableTypeTest.php
<?php declare(strict_types=1);
/*
 * This file is part of sebastian/type.
 *
 * (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 SebastianBergmann\Type;

use PHPUnit\Framework\TestCase;
use SebastianBergmann\Type\TestFixture\Iterator;

/**
 * @covers \SebastianBergmann\Type\IterableType
 *
 * @uses \SebastianBergmann\Type\Type
 * @uses \SebastianBergmann\Type\TypeName
 * @uses \SebastianBergmann\Type\ObjectType
 * @uses \SebastianBergmann\Type\SimpleType
 */
final class IterableTypeTest extends TestCase
{
    /**
     * @var IterableType
     */
    private $type;

    protected function setUp(): void
    {
        $this->type = new IterableType(false);
    }

    public function testMayDisallowNull(): void
    {
        $this->assertFalse($this->type->allowsNull());
    }

    public function testCanGenerateReturnTypeDeclaration(): void
    {
        $this->assertEquals(': iterable', $this->type->getReturnTypeDeclaration());
    }

    public function testMayAllowNull(): void
    {
        $type = new IterableType(true);

        $this->assertTrue($type->allowsNull());
    }

    public function testCanGenerateNullableReturnTypeDeclaration(): void
    {
        $type = new IterableType(true);

        $this->assertEquals(': ?iterable', $type->getReturnTypeDeclaration());
    }

    public function testNullCanBeAssignedToNullableIterable(): void
    {
        $type = new IterableType(true);

        $this->assertTrue($type->isAssignable(new NullType));
    }

    public function testIterableCanBeAssignedToIterable(): void
    {
        $this->assertTrue($this->type->isAssignable(new IterableType(false)));
    }

    public function testArrayCanBeAssignedToIterable(): void
    {
        $this->assertTrue(
            $this->type->isAssignable(
                Type::fromValue([], false)
            )
        );
    }

    public function testIteratorCanBeAssignedToIterable(): void
    {
        $this->assertTrue(
            $this->type->isAssignable(
                Type::fromValue(new Iterator, false)
            )
        );
    }

    public function testSomethingThatIsNotIterableCannotBeAssignedToIterable(): void
    {
        $this->assertFalse(
            $this->type->isAssignable(
                Type::fromValue(null, false)
            )
        );
    }
}

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