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<?php
namespace GuzzleHttp\Tests\Psr7;
use GuzzleHttp\Psr7;
use GuzzleHttp\Psr7\CachingStream;
/**
* @covers GuzzleHttp\Psr7\CachingStream
*/
class CachingStreamTest extends \PHPUnit_Framework_TestCase
{
/** @var CachingStream */
protected $body;
protected $decorated;
public function setUp()
{
$this->decorated = Psr7\stream_for('testing');
$this->body = new CachingStream($this->decorated);
}
public function tearDown()
{
$this->decorated->close();
$this->body->close();
}
public function testUsesRemoteSizeIfPossible()
{
$body = Psr7\stream_for('test');
$caching = new CachingStream($body);
$this->assertEquals(4, $caching->getSize());
}
public function testReadsUntilCachedToByte()
{
$this->body->seek(5);
$this->assertEquals('n', $this->body->read(1));
$this->body->seek(0);
$this->assertEquals('t', $this->body->read(1));
}
public function testCanSeekNearEndWithSeekEnd()
{
$baseStream = Psr7\stream_for(implode('', range('a', 'z')));
$cached = new CachingStream($baseStream);
$cached->seek(-1, SEEK_END);
$this->assertEquals(25, $baseStream->tell());
$this->assertEquals('z', $cached->read(1));
$this->assertEquals(26, $cached->getSize());
}
public function testCanSeekToEndWithSeekEnd()
{
$baseStream = Psr7\stream_for(implode('', range('a', 'z')));
$cached = new CachingStream($baseStream);
$cached->seek(0, SEEK_END);
$this->assertEquals(26, $baseStream->tell());
$this->assertEquals('', $cached->read(1));
$this->assertEquals(26, $cached->getSize());
}
public function testCanUseSeekEndWithUnknownSize()
{
$baseStream = Psr7\stream_for('testing');
$decorated = Psr7\FnStream::decorate($baseStream, [
'getSize' => function () { return null; }
]);
$cached = new CachingStream($decorated);
$cached->seek(-1, SEEK_END);
$this->assertEquals('g', $cached->read(1));
}
public function testRewindUsesSeek()
{
$a = Psr7\stream_for('foo');
$d = $this->getMockBuilder('GuzzleHttp\Psr7\CachingStream')
->setMethods(array('seek'))
->setConstructorArgs(array($a))
->getMock();
$d->expects($this->once())
->method('seek')
->with(0)
->will($this->returnValue(true));
$d->seek(0);
}
public function testCanSeekToReadBytes()
{
$this->assertEquals('te', $this->body->read(2));
$this->body->seek(0);
$this->assertEquals('test', $this->body->read(4));
$this->assertEquals(4, $this->body->tell());
$this->body->seek(2);
$this->assertEquals(2, $this->body->tell());
$this->body->seek(2, SEEK_CUR);
$this->assertEquals(4, $this->body->tell());
$this->assertEquals('ing', $this->body->read(3));
}
public function testCanSeekToReadBytesWithPartialBodyReturned()
{
$stream = fopen('php://temp', 'r+');
fwrite($stream, 'testing');
fseek($stream, 0);
$this->decorated = $this->getMockBuilder('\GuzzleHttp\Psr7\Stream')
->setConstructorArgs([$stream])
->setMethods(['read'])
->getMock();
$this->decorated->expects($this->exactly(2))
->method('read')
->willReturnCallback(function($length) use ($stream){
return fread($stream, 2);
});
$this->body = new CachingStream($this->decorated);
$this->assertEquals(0, $this->body->tell());
$this->body->seek(4, SEEK_SET);
$this->assertEquals(4, $this->body->tell());
$this->body->seek(0);
$this->assertEquals('test', $this->body->read(4));
}
public function testWritesToBufferStream()
{
$this->body->read(2);
$this->body->write('hi');
$this->body->seek(0);
$this->assertEquals('tehiing', (string) $this->body);
}
public function testSkipsOverwrittenBytes()
{
$decorated = Psr7\stream_for(
implode("\n", array_map(function ($n) {
return str_pad($n, 4, '0', STR_PAD_LEFT);
}, range(0, 25)))
);
$body = new CachingStream($decorated);
$this->assertEquals("0000\n", Psr7\readline($body));
$this->assertEquals("0001\n", Psr7\readline($body));
// Write over part of the body yet to be read, so skip some bytes
$this->assertEquals(5, $body->write("TEST\n"));
$this->assertEquals(5, $this->readAttribute($body, 'skipReadBytes'));
// Read, which skips bytes, then reads
$this->assertEquals("0003\n", Psr7\readline($body));
$this->assertEquals(0, $this->readAttribute($body, 'skipReadBytes'));
$this->assertEquals("0004\n", Psr7\readline($body));
$this->assertEquals("0005\n", Psr7\readline($body));
// Overwrite part of the cached body (so don't skip any bytes)
$body->seek(5);
$this->assertEquals(5, $body->write("ABCD\n"));
$this->assertEquals(0, $this->readAttribute($body, 'skipReadBytes'));
$this->assertEquals("TEST\n", Psr7\readline($body));
$this->assertEquals("0003\n", Psr7\readline($body));
$this->assertEquals("0004\n", Psr7\readline($body));
$this->assertEquals("0005\n", Psr7\readline($body));
$this->assertEquals("0006\n", Psr7\readline($body));
$this->assertEquals(5, $body->write("1234\n"));
$this->assertEquals(5, $this->readAttribute($body, 'skipReadBytes'));
// Seek to 0 and ensure the overwritten bit is replaced
$body->seek(0);
$this->assertEquals("0000\nABCD\nTEST\n0003\n0004\n0005\n0006\n1234\n0008\n0009\n", $body->read(50));
// Ensure that casting it to a string does not include the bit that was overwritten
$this->assertContains("0000\nABCD\nTEST\n0003\n0004\n0005\n0006\n1234\n0008\n0009\n", (string) $body);
}
public function testClosesBothStreams()
{
$s = fopen('php://temp', 'r');
$a = Psr7\stream_for($s);
$d = new CachingStream($a);
$d->close();
$this->assertFalse(is_resource($s));
}
/**
* @expectedException \InvalidArgumentException
*/
public function testEnsuresValidWhence()
{
$this->body->seek(10, -123456);
}
}
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