php-language-server/tests/Server/TextDocument/DidChangeTest.php

<?php
declare(strict_types=1);

namespace LanguageServer\Tests\Server\TextDocument;

use Amp\Loop;
use PHPUnit\Framework\TestCase;
use LanguageServer\Tests\MockProtocolStream;
use LanguageServer\{
    Server, LanguageClient, PhpDocumentLoader, DefinitionResolver
};
use LanguageServer\ContentRetriever\FileSystemContentRetriever;
use LanguageServer\Index\{Index, ProjectIndex, DependenciesIndex};
use LanguageServerProtocol\{
    VersionedTextDocumentIdentifier,
    TextDocumentContentChangeEvent,
    Range,
    Position
};

class DidChangeTest extends TestCase
{
    public function test()
    {
        Loop::run(function () {
            $projectIndex = new ProjectIndex(new Index, new DependenciesIndex);
            $client = new LanguageClient(new MockProtocolStream, new MockProtocolStream);
            $definitionResolver = new DefinitionResolver($projectIndex);
            $loader = new PhpDocumentLoader(new FileSystemContentRetriever, $projectIndex, $definitionResolver);
            $textDocument = new Server\TextDocument($loader, $definitionResolver, $client, $projectIndex);
            $phpDocument = $loader->open('whatever', "<?php\necho 'Hello, World'\n");

            $identifier = new VersionedTextDocumentIdentifier('whatever');
            $changeEvent = new TextDocumentContentChangeEvent();
            $changeEvent->range = new Range(new Position(0, 0), new Position(9999, 9999));
            $changeEvent->rangeLength = 9999;
            $changeEvent->text = "<?php\necho 'Goodbye, World'\n";

            yield $textDocument->didChange($identifier, [$changeEvent]);

            $this->assertEquals("<?php\necho 'Goodbye, World'\n", $phpDocument->getContent());
        });
    }
}