php-uuid/tests/Provider/Node/FallbackNodeProviderTest.php

<?php

declare(strict_types=1);

namespace Ramsey\Uuid\Test\Provider\Node;

use Ramsey\Uuid\Provider\Node\FallbackNodeProvider;
use Ramsey\Uuid\Provider\Node\NodeProviderCollection;
use Ramsey\Uuid\Provider\NodeProviderInterface;
use Ramsey\Uuid\Test\TestCase;

class FallbackNodeProviderTest extends TestCase
{
    public function testGetNodeCallsGetNodeOnEachProviderUntilNodeFound(): void
    {
        $providerWithNode = $this->getMockBuilder(NodeProviderInterface::class)->getMock();
        $providerWithNode->expects($this->once())
            ->method('getNode')
            ->willReturn('57764a07f756');
        $providerWithoutNode = $this->getMockBuilder(NodeProviderInterface::class)->getMock();
        $providerWithoutNode->expects($this->once())
            ->method('getNode')
            ->willReturn(null);

        $provider = new FallbackNodeProvider(new NodeProviderCollection([$providerWithoutNode, $providerWithNode]));
        $provider->getNode();
    }

    public function testGetNodeReturnsNodeFromFirstProviderWithNode(): void
    {
        $providerWithoutNode = $this->getMockBuilder(NodeProviderInterface::class)->getMock();
        $providerWithoutNode->expects($this->once())
            ->method('getNode')
            ->willReturn(null);
        $providerWithNode = $this->getMockBuilder(NodeProviderInterface::class)->getMock();
        $providerWithNode->expects($this->once())
            ->method('getNode')
            ->willReturn('57764a07f756');
        $anotherProviderWithoutNode = $this->getMockBuilder(NodeProviderInterface::class)->getMock();
        $anotherProviderWithoutNode->expects($this->never())
            ->method('getNode');

        $provider = new FallbackNodeProvider(new NodeProviderCollection(
            [$providerWithoutNode, $providerWithNode, $anotherProviderWithoutNode]
        ));
        $node = $provider->getNode();

        $this->assertEquals('57764a07f756', $node);
    }

    public function testGetNodeReturnsNullWhenNoNodesFound(): void
    {
        $providerWithoutNode = $this->getMockBuilder(NodeProviderInterface::class)->getMock();
        $providerWithoutNode->method('getNode')
            ->willReturn(null);

        $provider = new FallbackNodeProvider(new NodeProviderCollection([$providerWithoutNode]));
        $node = $provider->getNode();

        $this->assertNull($node);
    }
}