Add unit tests

tests/PHPUnit/WcGateway/Gateway/PayUponInvoice/PayUponInvoiceGatewayTest.php

@@ -0,0 +1,122 @@
+<?php
+declare(strict_types=1);
+
+namespace WooCommerce\PayPalCommerce\WcGateway\Gateway\PayUponInvoice;
+
+use Mockery;
+use Psr\Log\LoggerInterface;
+use WC_Order;
+use WooCommerce\PayPalCommerce\ApiClient\Entity\Order;
+use WooCommerce\PayPalCommerce\ApiClient\Entity\PurchaseUnit;
+use WooCommerce\PayPalCommerce\ApiClient\Factory\PurchaseUnitFactory;
+use WooCommerce\PayPalCommerce\Onboarding\Environment;
+use WooCommerce\PayPalCommerce\TestCase;
+use function Brain\Monkey\Functions\when;
+
+class PayUponInvoiceGatewayTest extends TestCase
+{
+	private $order_endpoint;
+	private $purchase_unit_factory;
+	private $payment_source_factory;
+	private $environment;
+	private $logger;
+	private $testee;
+
+	public function setUp(): void
+	{
+		parent::setUp();
+
+		$this->order_endpoint = Mockery::mock(PayUponInvoiceOrderEndpoint::class);
+		$this->purchase_unit_factory = Mockery::mock(PurchaseUnitFactory::class);
+		$this->payment_source_factory = Mockery::mock(PaymentSourceFactory::class);
+		$this->environment = Mockery::mock(Environment::class);
+		$this->logger = Mockery::mock(LoggerInterface::class);
+
+		$this->setInitStubs();
+
+		$this->testee = new PayUponInvoiceGateway(
+			$this->order_endpoint,
+			$this->purchase_unit_factory,
+			$this->payment_source_factory,
+			$this->environment,
+			$this->logger
+		);
+	}
+
+	public function testProcessPayment()
+	{
+		list($order, $purchase_unit, $payment_source) = $this->setTestStubs();
+
+		$this->order_endpoint->shouldReceive('create')->with(
+			[$purchase_unit],
+			$payment_source,
+			''
+		)->andReturn($order);
+
+		$result = $this->testee->process_payment(1);
+		$this->assertEquals('success', $result['result']);
+	}
+
+	public function testProcessPaymentError()
+	{
+		list($order, $purchase_unit, $payment_source) = $this->setTestStubs();
+
+		$this->logger->shouldReceive('error');
+		when('wc_add_notice')->justReturn();
+		when('wc_get_checkout_url')->justReturn();
+
+		$this->order_endpoint->shouldReceive('create')->with(
+			[$purchase_unit],
+			$payment_source,
+			''
+		)->andThrows(\RuntimeException::class);
+
+		$result = $this->testee->process_payment(1);
+		$this->assertEquals('failure', $result['result']);
+	}
+
+	private function setInitStubs(): void
+	{
+		when('get_option')->justReturn([
+			'title' => 'foo',
+			'description' => 'bar',
+		]);
+		when('get_bloginfo')->justReturn('Foo');
+
+		$woocommerce = Mockery::mock(\WooCommerce::class);
+		$cart = Mockery::mock(\WC_Cart::class);
+		when('WC')->justReturn($woocommerce);
+		$woocommerce->cart = $cart;
+		$cart->shouldReceive('empty_cart');
+	}
+
+	/**
+	 * @return array
+	 */
+	private function setTestStubs(): array
+	{
+		$wcOrder = Mockery::mock(WC_Order::class);
+		$wcOrder->shouldReceive('update_meta_data');
+		$wcOrder->shouldReceive('update_status');
+		when('wc_get_order')->justReturn($wcOrder);
+
+		$order = Mockery::mock(Order::class);
+		$order->shouldReceive('id')->andReturn('1');
+		$order->shouldReceive('intent')->andReturn('CAPTURE');
+
+		$purchase_unit = Mockery::mock(PurchaseUnit::class);
+		$payment_source = Mockery::mock(PaymentSource::class);
+
+		$this->payment_source_factory->shouldReceive('from_wc_order')
+			->with($wcOrder, '')
+			->andReturn($payment_source);
+
+		$this->purchase_unit_factory->shouldReceive('from_wc_order')
+			->with($wcOrder)
+			->andReturn($purchase_unit);
+
+		$this->environment->shouldReceive('current_environment_is')->andReturn(true);
+
+		return array($order, $purchase_unit, $payment_source);
+	}
+}