Unit test Payment_Gateway\External_Checkout\Google_Pay\Google_Pay::get_merchant_id method

Author: nmolham-godaddy

tests/unit/Payment_Gateway/External_Checkout/Google_Pay/GooglePayTest.php

@@ -0,0 +1,80 @@
+<?php
+
+namespace SkyVerge\WooCommerce\PluginFramework\v5_15_1\Tests\Unit\Payment_Gateway\External_Checkout\Google_Pay;
+
+use Generator;
+use Mockery;
+use ReflectionException;
+use SkyVerge\WooCommerce\PluginFramework\v5_15_3\Payment_Gateway\External_Checkout\Google_Pay\Google_Pay;
+use SkyVerge\WooCommerce\PluginFramework\v5_15_3\Tests\TestCase;
+use WP_Mock;
+
+/**
+ * @coversDefaultClass \SkyVerge\WooCommerce\PluginFramework\v5_15_3\Payment_Gateway\External_Checkout\Google_Pay\Google_Pay
+ */
+class GooglePayTest extends TestCase
+{
+	/** @var Mockery\MockInterface&Google_Pay */
+	private $testObject;
+
+	public function setUp() : void
+	{
+		parent::setUp();
+
+		$this->testObject = Mockery::mock(Google_Pay::class)
+			->shouldAllowMockingProtectedMethods()
+			->makePartial();
+	}
+
+	/**
+	 * @covers ::get_merchant_id()
+	 * @dataProvider providerCanGetMerchantId
+	 *
+	 * @throws ReflectionException
+	 */
+	public function testCanGetMerchantId($merchantId, string $expected) : void
+	{
+		$this->setInaccessiblePropertyValue($this->testObject, 'id', $id = 'TEST_ID');
+
+		WP_Mock::userFunction('get_option')
+			->once()
+			->with("sv_wc_{$id}_merchant_id")
+			->andReturn($merchantId);
+
+		$this->assertSame($expected, $this->testObject->get_merchant_id());
+	}
+
+	/** @see testCanGetMerchantId */
+	public function providerCanGetMerchantId() : Generator
+	{
+		yield 'valid value' => [
+			'merchantId' => 'TEST_MERCHANT_ID',
+			'expected'   => 'TEST_MERCHANT_ID',
+		];
+
+		yield 'empty string value' => [
+			'merchantId' => '',
+			'expected'   => '',
+		];
+
+		yield 'scalar value: bool' => [
+			'merchantId' => false,
+			'expected'   => '',
+		];
+
+		yield 'scalar value: int' => [
+			'merchantId' => 123,
+			'expected'   => '123',
+		];
+
+		yield 'scalar value: float' => [
+			'merchantId' => 45.6,
+			'expected'   => '45.6',
+		];
+
+		yield 'non-string value: array' => [
+			'merchantId' => ['test'],
+			'expected'   => '',
+		];
+	}
+}

woocommerce/payment-gateway/External_Checkout/Google_Pay/Google_Pay.php

@@ -713,7 +713,9 @@ public function get_supported_networks() {
 	 */
 	public function get_merchant_id() : string {
 
-		return get_option( "sv_wc_{$this->id}_merchant_id" ) ?? '';
+		$optionValue = get_option("sv_wc_{$this->id}_merchant_id");
+
+		return $optionValue && is_scalar($optionValue) ? (string) $optionValue : '';
 	}
 
 	/**