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<?php
namespace MongoDB\Tests\GridFS;
use MongoDB\BSON\Binary;
use MongoDB\GridFS\CollectionWrapper;
use MongoDB\GridFS\ReadableStream;
use MongoDB\Tests\CommandObserver;
use stdClass;
/**
* Functional tests for the internal ReadableStream class.
*/
class ReadableStreamFunctionalTest extends FunctionalTestCase
{
private $collectionWrapper;
public function setUp()
{
parent::setUp();
$this->collectionWrapper = new CollectionWrapper($this->manager, $this->getDatabaseName(), 'fs');
$this->filesCollection->insertMany([
['_id' => 'length-0', 'length' => 0, 'chunkSize' => 4],
['_id' => 'length-0-with-empty-chunk', 'length' => 0, 'chunkSize' => 4],
['_id' => 'length-2', 'length' => 2, 'chunkSize' => 4],
['_id' => 'length-8', 'length' => 8, 'chunkSize' => 4],
['_id' => 'length-10', 'length' => 10, 'chunkSize' => 4],
]);
$this->chunksCollection->insertMany([
['_id' => 1, 'files_id' => 'length-0-with-empty-chunk', 'n' => 0, 'data' => new Binary('', Binary::TYPE_GENERIC)],
['_id' => 2, 'files_id' => 'length-2', 'n' => 0, 'data' => new Binary('ab', Binary::TYPE_GENERIC)],
['_id' => 3, 'files_id' => 'length-8', 'n' => 0, 'data' => new Binary('abcd', Binary::TYPE_GENERIC)],
['_id' => 4, 'files_id' => 'length-8', 'n' => 1, 'data' => new Binary('efgh', Binary::TYPE_GENERIC)],
['_id' => 5, 'files_id' => 'length-10', 'n' => 0, 'data' => new Binary('abcd', Binary::TYPE_GENERIC)],
['_id' => 6, 'files_id' => 'length-10', 'n' => 1, 'data' => new Binary('efgh', Binary::TYPE_GENERIC)],
['_id' => 7, 'files_id' => 'length-10', 'n' => 2, 'data' => new Binary('ij', Binary::TYPE_GENERIC)],
]);
}
public function testGetFile()
{
$fileDocument = (object) ['_id' => null, 'chunkSize' => 1, 'length' => 0];
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
$this->assertSame($fileDocument, $stream->getFile());
}
/**
* @expectedException MongoDB\GridFS\Exception\CorruptFileException
* @dataProvider provideInvalidConstructorFileDocuments
*/
public function testConstructorFileDocumentChecks($file)
{
new ReadableStream($this->collectionWrapper, $file);
}
public function provideInvalidConstructorFileDocuments()
{
$options = [];
foreach ($this->getInvalidIntegerValues() as $value) {
$options[][] = (object) ['_id' => 1, 'chunkSize' => $value, 'length' => 0];
}
foreach ($this->getInvalidIntegerValues() as $value) {
$options[][] = (object) ['_id' => 1, 'chunkSize' => 1, 'length' => $value];
}
$options[][] = (object) ['_id' => 1, 'chunkSize' => 0, 'length' => 0];
$options[][] = (object) ['_id' => 1, 'chunkSize' => 1, 'length' => -1];
$options[][] = (object) ['chunkSize' => 1, 'length' => 0];
return $options;
}
/**
* @dataProvider provideFileIdAndExpectedBytes
*/
public function testReadBytes($fileId, $length, $expectedBytes)
{
$fileDocument = $this->collectionWrapper->findFileById($fileId);
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
$this->assertSame($expectedBytes, $stream->readBytes($length));
}
public function provideFileIdAndExpectedBytes()
{
return [
['length-0', 0, ''],
['length-0', 2, ''],
['length-0-with-empty-chunk', 0, ''],
['length-0-with-empty-chunk', 2, ''],
['length-2', 0, ''],
['length-2', 2, 'ab'],
['length-2', 4, 'ab'],
['length-8', 0, ''],
['length-8', 2, 'ab'],
['length-8', 4, 'abcd'],
['length-8', 6, 'abcdef'],
['length-8', 8, 'abcdefgh'],
['length-8', 10, 'abcdefgh'],
['length-10', 0, ''],
['length-10', 2, 'ab'],
['length-10', 4, 'abcd'],
['length-10', 6, 'abcdef'],
['length-10', 8, 'abcdefgh'],
['length-10', 10, 'abcdefghij'],
['length-10', 12, 'abcdefghij'],
];
}
public function provideFilteredFileIdAndExpectedBytes()
{
return array_filter($this->provideFileIdAndExpectedBytes(),
function(array $args) {
return $args[1] > 0;
}
);
}
/**
* @dataProvider provideFilteredFileIdAndExpectedBytes
*/
public function testReadBytesCalledMultipleTimes($fileId, $length, $expectedBytes)
{
$fileDocument = $this->collectionWrapper->findFileById($fileId);
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
for ($i = 0; $i < $length; $i++) {
$expectedByte = isset($expectedBytes[$i]) ? $expectedBytes[$i] : '';
$this->assertSame($expectedByte, $stream->readBytes(1));
}
}
/**
* @expectedException MongoDB\GridFS\Exception\CorruptFileException
* @expectedExceptionMessage Chunk not found for index "2"
*/
public function testReadBytesWithMissingChunk()
{
$this->chunksCollection->deleteOne(['files_id' => 'length-10', 'n' => 2]);
$fileDocument = $this->collectionWrapper->findFileById('length-10');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
$stream->readBytes(10);
}
/**
* @expectedException MongoDB\GridFS\Exception\CorruptFileException
* @expectedExceptionMessage Expected chunk to have index "1" but found "2"
*/
public function testReadBytesWithUnexpectedChunkIndex()
{
$this->chunksCollection->deleteOne(['files_id' => 'length-10', 'n' => 1]);
$fileDocument = $this->collectionWrapper->findFileById('length-10');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
$stream->readBytes(10);
}
/**
* @expectedException MongoDB\GridFS\Exception\CorruptFileException
* @expectedExceptionMessage Expected chunk to have size "2" but found "1"
*/
public function testReadBytesWithUnexpectedChunkSize()
{
$this->chunksCollection->updateOne(
['files_id' => 'length-10', 'n' => 2],
['$set' => ['data' => new Binary('i', Binary::TYPE_GENERIC)]]
);
$fileDocument = $this->collectionWrapper->findFileById('length-10');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
$stream->readBytes(10);
}
/**
* @expectedException MongoDB\Exception\InvalidArgumentException
*/
public function testReadBytesWithNegativeLength()
{
$fileDocument = $this->collectionWrapper->findFileById('length-0');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
$stream->readBytes(-1);
}
public function testSeekBeforeReading()
{
$fileDocument = $this->collectionWrapper->findFileById('length-10');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
$stream->seek(8);
$this->assertSame('ij', $stream->readBytes(2));
}
/**
* @expectedException MongoDB\Exception\InvalidArgumentException
* @expectedExceptionMessage $offset must be >= 0 and <= 10; given: 11
*/
public function testSeekOutOfRange()
{
$fileDocument = $this->collectionWrapper->findFileById('length-10');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
$stream->seek(11);
}
/**
* @dataProvider providePreviousChunkSeekOffsetAndBytes
*/
public function testSeekPreviousChunk($offset, $length, $expectedBytes)
{
$fileDocument = $this->collectionWrapper->findFileById('length-10');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
// Read to initialize and advance the chunk iterator to the last chunk
$this->assertSame('abcdefghij', $stream->readBytes(10));
$commands = [];
(new CommandObserver)->observe(
function() use ($stream, $offset, $length, $expectedBytes) {
$stream->seek($offset);
$this->assertSame($expectedBytes, $stream->readBytes($length));
},
function(stdClass $command) use (&$commands) {
$commands[] = key((array) $command);
}
);
$this->assertSame(['find'], $commands);
}
public function providePreviousChunkSeekOffsetAndBytes()
{
return [
[0, 4, 'abcd'],
[2, 4, 'cdef'],
[4, 4, 'efgh'],
[6, 4, 'ghij'],
];
}
/**
* @dataProvider provideSameChunkSeekOffsetAndBytes
*/
public function testSeekSameChunk($offset, $length, $expectedBytes)
{
$fileDocument = $this->collectionWrapper->findFileById('length-10');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
// Read to initialize and advance the chunk iterator to the middle chunk
$this->assertSame('abcdef', $stream->readBytes(6));
$commands = [];
(new CommandObserver)->observe(
function() use ($stream, $offset, $length, $expectedBytes) {
$stream->seek($offset);
$this->assertSame($expectedBytes, $stream->readBytes($length));
},
function(stdClass $command) use (&$commands) {
$commands[] = key((array) $command);
}
);
$this->assertSame([], $commands);
}
public function provideSameChunkSeekOffsetAndBytes()
{
return [
[4, 4, 'efgh'],
[6, 4, 'ghij'],
];
}
/**
* @dataProvider provideSubsequentChunkSeekOffsetAndBytes
*/
public function testSeekSubsequentChunk($offset, $length, $expectedBytes)
{
$fileDocument = $this->collectionWrapper->findFileById('length-10');
$stream = new ReadableStream($this->collectionWrapper, $fileDocument);
// Read to initialize the chunk iterator to the first chunk
$this->assertSame('a', $stream->readBytes(1));
$commands = [];
(new CommandObserver)->observe(
function() use ($stream, $offset, $length, $expectedBytes) {
$stream->seek($offset);
$this->assertSame($expectedBytes, $stream->readBytes($length));
},
function(stdClass $command) use (&$commands) {
$commands[] = key((array) $command);
}
);
$this->assertSame([], $commands);
}
public function provideSubsequentChunkSeekOffsetAndBytes()
{
return [
[4, 4, 'efgh'],
[6, 4, 'ghij'],
[8, 2, 'ij'],
];
}
}