public function testExceedingHighwaterMarkReturnsFalseButStillBuffers()
{
$b = new BufferStream(5);
$this->assertEquals(3, $b->write('hi '));
$this->assertFalse($b->write('hello'));
$this->assertEquals('hi hello', (string) $b);
$this->assertEquals(4, $b->write('test'));
}
public function testBeginsDroppingWhenSizeExceeded()
{
$stream = new BufferStream();
$drop = new DroppingStream($stream, 5);
$this->assertEquals(3, $drop->write('hel'));
$this->assertEquals(2, $drop->write('lo'));
$this->assertEquals(5, $drop->getSize());
$this->assertEquals('hello', $drop->read(5));
$this->assertEquals(0, $drop->getSize());
$drop->write('12345678910');
$this->assertEquals(5, $stream->getSize());
$this->assertEquals(5, $drop->getSize());
$this->assertEquals('12345', (string) $drop);
$this->assertEquals(0, $drop->getSize());
$drop->write('hello');
$this->assertSame(0, $drop->write('test'));
}
private function pump($length)
{
if ($this->source) {
do {
$data = call_user_func($this->source, $length);
if ($data === false || $data === null) {
$this->source = null;
return;
}
$this->buffer->write($data);
$length -= strlen($data);
} while ($length > 0);
}
}