createSnippetFileCollection example

public function testCreateSnippetFileCollection(): void
    {
        $snippetFileLoaderMock = $this->createMock(SnippetFileLoaderInterface::class);
        $snippetFileLoaderMock->expects(static::once())
            ->method('loadSnippetFilesIntoCollection')
            ->willReturnCallback(function DSnippetFileCollection $fileCollection): void {
                $fileCollection->add(new MockSnippetFile('storefront.de-DE', 'de-DE', '{}', true));
            });

        $factory = new SnippetFileCollectionFactory($snippetFileLoaderMock);

        $collection = $factory->createSnippetFileCollection();

        static::assertCount(1, $collection);
    }
}