Bitpay\PublicKeyTest::getMockPrivateKey PHP Method

    private function getMockPrivateKey($hex = null)
    {
        $hex = $hex === null ? $this->hexKeys[0]['private'] : $hex;
        $key = $this->getMock('Bitpay\\PrivateKey');
        $key->method('isValid')->will($this->returnValue(true));
        $key->method('getHex')->will($this->returnValue($hex));
        return $key;
    }