public function testScalarMultiply()
 {
     $matrix = new LL_Matrix(array(array(1, 1, 1), array(1, 1, 1), array(1, 1, 1)));
     $result = $matrix->scalarMultiply(2);
     $this->checkAllValues($result, 2);
     $result = $result->scalarMultiply(1 / 2);
     $this->checkAllValues($result, 1);
     $result = $result->scalarMultiply(0);
     $this->checkAllValues($result, 0);
     $result = $this->getIdentityMatrix()->scalarMultiply(0);
     $this->checkAllValues($result, 0);
     $matrix = $this->getIdentityMatrix(4);
     $result = $matrix->scalarMultiply(5);
     for ($i = 0; $i < 4; $i++) {
         $this->assertEquals($result->get($i, $i), 5);
     }
 }