public function testConcatStreams() { $streamA = new S\Stream($this->array); $streamB = new S\Stream($this->array); $newStream = S\Stream::concat($streamA, $streamB); $this->assertInstanceOf('Streams\\Base\\BaseStream', $newStream); $this->assertEquals($newStream->getElements(), $streamA->getElements() + $streamB->getElements()); }