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<?php
namespace GuzzleHttp\Tests\Psr7;
use GuzzleHttp\Psr7;
use GuzzleHttp\Psr7\FnStream;
use GuzzleHttp\Psr7\Stream;
use GuzzleHttp\Psr7\LimitStream;
use GuzzleHttp\Psr7\NoSeekStream;
/**
* @covers GuzzleHttp\Psr7\LimitStream
*/
class LimitStreamTest extends \PHPUnit_Framework_TestCase
{
/** @var LimitStream */
protected $body;
/** @var Stream */
protected $decorated;
public function setUp()
{
$this->decorated = Psr7\stream_for(fopen(__FILE__, 'r'));
$this->body = new LimitStream($this->decorated, 10, 3);
}
public function testReturnsSubset()
{
$body = new LimitStream(Psr7\stream_for('foo'), -1, 1);
$this->assertEquals('oo', (string) $body);
$this->assertTrue($body->eof());
$body->seek(0);
$this->assertFalse($body->eof());
$this->assertEquals('oo', $body->read(100));
$this->assertSame('', $body->read(1));
$this->assertTrue($body->eof());
}
public function testReturnsSubsetWhenCastToString()
{
$body = Psr7\stream_for('foo_baz_bar');
$limited = new LimitStream($body, 3, 4);
$this->assertEquals('baz', (string) $limited);
}
/**
* @expectedException \RuntimeException
* @expectedExceptionMessage Unable to seek to stream position 10 with whence 0
*/
public function testEnsuresPositionCanBeekSeekedTo()
{
new LimitStream(Psr7\stream_for(''), 0, 10);
}
public function testReturnsSubsetOfEmptyBodyWhenCastToString()
{
$body = Psr7\stream_for('01234567891234');
$limited = new LimitStream($body, 0, 10);
$this->assertEquals('', (string) $limited);
}
public function testReturnsSpecificSubsetOBodyWhenCastToString()
{
$body = Psr7\stream_for('0123456789abcdef');
$limited = new LimitStream($body, 3, 10);
$this->assertEquals('abc', (string) $limited);
}
public function testSeeksWhenConstructed()
{
$this->assertEquals(0, $this->body->tell());
$this->assertEquals(3, $this->decorated->tell());
}
public function testAllowsBoundedSeek()
{
$this->body->seek(100);
$this->assertEquals(10, $this->body->tell());
$this->assertEquals(13, $this->decorated->tell());
$this->body->seek(0);
$this->assertEquals(0, $this->body->tell());
$this->assertEquals(3, $this->decorated->tell());
try {
$this->body->seek(-10);
$this->fail();
} catch (\RuntimeException $e) {}
$this->assertEquals(0, $this->body->tell());
$this->assertEquals(3, $this->decorated->tell());
$this->body->seek(5);
$this->assertEquals(5, $this->body->tell());
$this->assertEquals(8, $this->decorated->tell());
// Fail
try {
$this->body->seek(1000, SEEK_END);
$this->fail();
} catch (\RuntimeException $e) {}
}
public function testReadsOnlySubsetOfData()
{
$data = $this->body->read(100);
$this->assertEquals(10, strlen($data));
$this->assertSame('', $this->body->read(1000));
$this->body->setOffset(10);
$newData = $this->body->read(100);
$this->assertEquals(10, strlen($newData));
$this->assertNotSame($data, $newData);
}
/**
* @expectedException \RuntimeException
* @expectedExceptionMessage Could not seek to stream offset 2
*/
public function testThrowsWhenCurrentGreaterThanOffsetSeek()
{
$a = Psr7\stream_for('foo_bar');
$b = new NoSeekStream($a);
$c = new LimitStream($b);
$a->getContents();
$c->setOffset(2);
}
public function testCanGetContentsWithoutSeeking()
{
$a = Psr7\stream_for('foo_bar');
$b = new NoSeekStream($a);
$c = new LimitStream($b);
$this->assertEquals('foo_bar', $c->getContents());
}
public function testClaimsConsumedWhenReadLimitIsReached()
{
$this->assertFalse($this->body->eof());
$this->body->read(1000);
$this->assertTrue($this->body->eof());
}
public function testContentLengthIsBounded()
{
$this->assertEquals(10, $this->body->getSize());
}
public function testGetContentsIsBasedOnSubset()
{
$body = new LimitStream(Psr7\stream_for('foobazbar'), 3, 3);
$this->assertEquals('baz', $body->getContents());
}
public function testReturnsNullIfSizeCannotBeDetermined()
{
$a = new FnStream([
'getSize' => function () { return null; },
'tell' => function () { return 0; },
]);
$b = new LimitStream($a);
$this->assertNull($b->getSize());
}
public function testLengthLessOffsetWhenNoLimitSize()
{
$a = Psr7\stream_for('foo_bar');
$b = new LimitStream($a, -1, 4);
$this->assertEquals(3, $b->getSize());
}
}
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