public function testIsReadableReturnsFalseWhenStreamIsDetached() { $this->tmpnam = tempnam(sys_get_temp_dir(), 'diac'); file_put_contents($this->tmpnam, 'FOO BAR'); $resource = fopen($this->tmpnam, 'wb+'); $stream = new Stream($resource); $stream->detach(); $this->assertFalse($stream->isReadable()); }