NumPHPTest\Core\NumArray\Reduce\SumTest::testSumMatrixAxis0 PHP Method

    public function testSumMatrixAxis0()
    {
        $numArray = NumPHP::arange(1, 12)->reshape(3, 4);
        $expectedNumArray = NumPHP::arange(15, 24, 3);
        $this->assertNumArrayEquals($expectedNumArray, $numArray->sum(0));
    }