CouponTest.php

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<?php
namespace Magento\SalesRule\Test\Unit\Helper;

class CouponTest extends \PHPUnit\Framework\TestCase
{
    protected $helper;

    protected $scopeConfig;

    protected $context;

    protected $couponParameters;

    protected $separator = '|';

    protected function setUp()
    {
        $this->couponParameters = [
            'separator' => $this->separator,
            'charset' => [
                'format' => 'abc',
            ],
        ];
        $objectManager = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
        $className = \Magento\SalesRule\Helper\Coupon::class;
        $arguments = $objectManager->getConstructArguments(
            $className,
            ['couponParameters' => $this->couponParameters]
        );
        $context = $arguments['context'];
        $this->scopeConfig = $context->getScopeConfig();
        $this->helper = $objectManager->getObject(\Magento\SalesRule\Helper\Coupon::class, $arguments);
    }

    public function testGetFormatsList()
    {
        $helper = $this->helper;
        $this->assertArrayHasKey(
            $helper::COUPON_FORMAT_ALPHABETICAL,
            $helper->getFormatsList(),
            'The returned list should contain COUPON_FORMAT_ALPHABETICAL constant value as a key'
        );
        $this->assertArrayHasKey(
            $helper::COUPON_FORMAT_ALPHANUMERIC,
            $helper->getFormatsList(),
            'The returned list should contain COUPON_FORMAT_ALPHANUMERIC constant value as a key'
        );
        $this->assertArrayHasKey(
            $helper::COUPON_FORMAT_NUMERIC,
            $helper->getFormatsList(),
            'The returned list should contain COUPON_FORMAT_NUMERIC constant value as a key'
        );
    }

    public function testGetDefaultLength()
    {
        $helper = $this->helper;
        $defaultLength = 100;
        $this->scopeConfig->expects($this->once())
            ->method('getValue')
            ->with($helper::XML_PATH_SALES_RULE_COUPON_LENGTH, \Magento\Store\Model\ScopeInterface::SCOPE_STORE)
            ->will($this->returnValue($defaultLength));

        $this->assertEquals($defaultLength, $helper->getDefaultLength());
    }

    public function testGetDefaultFormat()
    {
        $helper = $this->helper;
        $defaultFormat = 'format';
        $this->scopeConfig->expects($this->once())
            ->method('getValue')
            ->with($helper::XML_PATH_SALES_RULE_COUPON_FORMAT, \Magento\Store\Model\ScopeInterface::SCOPE_STORE)
            ->will($this->returnValue($defaultFormat));

        $this->assertEquals($defaultFormat, $helper->getDefaultFormat());
    }

    public function testGetDefaultPrefix()
    {
        $helper = $this->helper;
        $defaultPrefix = 'prefix';
        $this->scopeConfig->expects($this->once())
            ->method('getValue')
            ->with($helper::XML_PATH_SALES_RULE_COUPON_PREFIX, \Magento\Store\Model\ScopeInterface::SCOPE_STORE)
            ->will($this->returnValue($defaultPrefix));

        $this->assertEquals($defaultPrefix, $helper->getDefaultPrefix());
    }

    public function testGetDefaultSuffix()
    {
        $helper = $this->helper;
        $defaultSuffix = 'suffix';
        $this->scopeConfig->expects($this->once())
            ->method('getValue')
            ->with($helper::XML_PATH_SALES_RULE_COUPON_SUFFIX, \Magento\Store\Model\ScopeInterface::SCOPE_STORE)
            ->will($this->returnValue($defaultSuffix));

        $this->assertEquals($defaultSuffix, $helper->getDefaultSuffix());
    }

    public function testGetDefaultDashInterval()
    {
        $helper = $this->helper;
        $defaultDashInterval = 4;
        $this->scopeConfig->expects($this->once())
            ->method('getValue')
            ->with($helper::XML_PATH_SALES_RULE_COUPON_DASH_INTERVAL, \Magento\Store\Model\ScopeInterface::SCOPE_STORE)
            ->will($this->returnValue($defaultDashInterval));

        $this->assertEquals($defaultDashInterval, $helper->getDefaultDashInterval());
    }

    public function testGetCharset()
    {
        $format = 'format';
        $expected = ['a', 'b', 'c'];

        $this->assertEquals($expected, $this->helper->getCharset($format));
    }

    public function testGetSeparator()
    {
        $this->assertEquals($this->separator, $this->helper->getCodeSeparator());
    }
}