Bitpay\Math\BcEngineTest::testiInvertm PHP Method

    public function testiInvertm()
    {
        $math = new BcEngine();
        $a = 1234;
        $b = '1234123412341234123412341234123412412341234213412421341342342';
        $c = '0x1234123412341234123412341234123412412341234213412421341342342';
        $this->assertEquals(0, $math->invertm($a, $a));
        $this->assertEquals(0, $math->invertm($b, $b));
        $this->assertEquals(0, $math->invertm($c, $c));
        $this->assertEquals('1', $math->invertm(15, 14));
        $this->assertEquals(0, $math->invertm(-1, 1));
        $this->assertEquals(0, $math->invertm(1, 1));
        $o = '2';
        $p = '0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f';
        $this->assertEquals('57896044618658097711785492504343953926634992332820282019728792003954417335832', $math->invertm($o, $p));
        $o = '-207267379875244730201206352791949018434229233557197871725317424106240926035466';
        $p = '0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f';
        $this->assertEquals('93736451599995461267424215486556527005103980679329099329644578865571485201981', $math->invertm($o, $p));
    }