/**
* @expectedExceptionMessage Cannot write to an AppendStream
* @expectedException \RuntimeException
*/
public function testIsNotWritable()
{
$a = new AppendStream(array(Psr7\stream_for('foo')));
$this->assertFalse($a->isWritable());
$this->assertTrue($a->isSeekable());
$this->assertTrue($a->isReadable());
$a->write('foo');
}
