Saya mempunyai kaedah foo() ini dan saya perlu menambah kes ujian unit untuk kaedah ini testFoo() dalam Magento. Tetapi Mage::getSingleton('checkout/cart') tidak boleh disimulasikan.

Kaedah sumber

public function foo()
{
    return Mage::getSingleton('checkout/cart')->getQuote()->getFunctionName();
}

Fungsi ujian

public function testFoo(): void
{
    //$this->className :: Project_Catalog_Helper_Test
    $expected = 'string';
    $this->className->method('getSingleton')->willReturn($this->cart);
    $this->cart->method('getQuote')->willReturn($this->cart);
    $this->cart->method('getFunctionName')->willReturn('string');
    $this->assertEquals(
        $this->className->foo(),
        $expected
    );
}

Apabila saya menjalankan php-unit saya mendapat log ralat ini.

MacBook-Pro % ./vendor/bin/phpunit tests/src/app/code/local/project/Catalog/Helper/OrderTest.php
PHPUnit 6.5.14 by Sebastian Bergmann and contributors.

Runtime:       PHP 7.3.11
Configuration: /project_path/phpunit.xml.dist

E                                                                   1 / 1 (100%)

Time: 150 ms, Memory: 8.00MB

There was 1 error:

1) Project_Catalog_Helper_Test::testFoo
Error: Call to a member function getCode() on bool

/project_path/app/code/core/Mage/Customer/Model/Session.php:103
/project_path/app/code/core/Mage/Core/Model/Config.php:1394
/project_path/app/Mage.php:517
/project_path/app/Mage.php:531
/project_path/app/code/community/Checkout/Model/Cart.php:20
/project_path/app/code/local/project/Catalog/Helper/Order.php:21
/project_path/tests/src/app/code/local/project/Catalog/Helper/OrderTest.php:100
/project_path/vendor/phpunit/phpunit/phpunit:53

Perlukan beberapa penyelesaian, cara mensimulasikan Mage::getSingleton('checkout/cart').

Nota: Saya tidak boleh menukar kaedah utama kerana ia adalah kod warisan. Hanya tambah kes ujian unit.