public function testDecomposeReturnsDecomposition()
 {
     $mock = $this->getMock('Chippyash\\Math\\Matrix\\Interfaces\\DecompositionInterface');
     $mock->expects($this->once())->method('decompose')->will($this->returnValue($mock));
     $mA = new NumericMatrix([]);
     $this->assertEquals($mock, $mA->decompose($mock));
 }