graze / data-file

        static::assertInstanceOf(ReaderInterface::class, $reader);

    }

    public function testProvidingAParserFactoryWillUseTheFactory()

    {

        $stream = fopen('php://memory', 'r');

        $iterator = m::mock(Iterator::class);

        $parser = m::mock(ParserInterface::class);

        $parser->shouldReceive('parse')

               ->andReturn($iterator);

        $reader = $this->buildFactoryReader($stream, $parser);

        static::assertInstanceOf(ReaderInterface::class, $reader);

    }

    public function testFetch()

    {

class FileWriterTest extends TestCase

{

    public function testNodeStreamFileWillGetAStream()

    {

        $stream = $this->getStream();

        $file = m::mock(FileNodeInterface::class, NodeStreamInterface::class);

        $file->shouldReceive('getStream')

             ->with('c+b')

             ->andReturn($stream);

        $format = m::mock(CsvFormat::class)

                   ->makePartial();

        $writer = new FileWriter($file, $format);

        static::assertInstanceOf(WriterInterface::class, $writer);

    }

    public function testFileNodeWillThrowAnException()

    {