Use PHP 7.4 featers and PHP 8 polyfills

tests/WP_Ultimo/Date_Functions_Test.php

@@ -3,7 +3,7 @@
 namespace WP_Ultimo;
 
 class Date_Functions_Test extends \WP_UnitTestCase {
-	public function test_wu_get_days_ago() {
+	public function test_wu_get_days_ago(): void {
 		$days = wu_get_days_ago('2024-01-01 00:00:00', '2024-01-31 00:00:00');
 
 		$this->assertEquals(-30, $days);

tests/WP_Ultimo/Models/Discount_Code_Test.php

@@ -10,7 +10,7 @@ class Discount_Code_Test extends WP_UnitTestCase {
 	/**
 	 * Tests that a valid discount code returns true.
 	 */
-	public function test_is_valid_active_discount_code() {
+	public function test_is_valid_active_discount_code(): void {
 		$discount_code = new Discount_Code();
 		$discount_code->set_active(true);
 
@@ -22,7 +22,7 @@ class Discount_Code_Test extends WP_UnitTestCase {
 	/**
 	 * Tests that an inactive discount code returns an error.
 	 */
-	public function test_is_valid_inactive_discount_code() {
+	public function test_is_valid_inactive_discount_code(): void {
 		$discount_code = new Discount_Code();
 		$discount_code->set_active(false);
 
@@ -36,7 +36,7 @@ class Discount_Code_Test extends WP_UnitTestCase {
 	/**
 	 * Tests that a discount code with max uses returns an error after being used maximum times.
 	 */
-	public function test_is_valid_max_uses_exceeded() {
+	public function test_is_valid_max_uses_exceeded(): void {
 		$discount_code = new Discount_Code();
 		$discount_code->set_active(true);
 		$discount_code->set_max_uses(5);
@@ -55,7 +55,7 @@ class Discount_Code_Test extends WP_UnitTestCase {
 	/**
 	 * Tests that a discount code before the start date is invalid.
 	 */
-	public function test_is_valid_before_start_date() {
+	public function test_is_valid_before_start_date(): void {
 		$discount_code = new Discount_Code();
 		$discount_code->set_active(true);
 		$discount_code->set_date_start(date('Y-m-d H:i:s', strtotime('+1 day')));
@@ -70,7 +70,7 @@ class Discount_Code_Test extends WP_UnitTestCase {
 	/**
 	 * Tests that a discount code after the expiration date is invalid.
 	 */
-	public function test_is_valid_after_expiration_date() {
+	public function test_is_valid_after_expiration_date(): void {
 		$discount_code = new Discount_Code();
 		$discount_code->set_active(true);
 		$discount_code->set_date_expiration(date('Y-m-d H:i:s', strtotime('-1 day')));
@@ -85,12 +85,12 @@ class Discount_Code_Test extends WP_UnitTestCase {
 	/**
 	 * Tests that a discount code limited to specific products returns true for allowed products.
 	 */
-	public function test_is_valid_for_allowed_product() {
+	public function test_is_valid_for_allowed_product(): void {
 		$product_id    = 123;
 		$discount_code = new Discount_Code();
 		$discount_code->set_active(true);
 		$discount_code->set_limit_products(true);
-		$discount_code->set_allowed_products(array($product_id));
+		$discount_code->set_allowed_products([$product_id]);
 
 		$result = $discount_code->is_valid($product_id);
 
@@ -100,13 +100,13 @@ class Discount_Code_Test extends WP_UnitTestCase {
 	/**
 	 * Tests that a discount code limited to specific products returns an error for disallowed products.
 	 */
-	public function test_is_valid_for_disallowed_product() {
+	public function test_is_valid_for_disallowed_product(): void {
 		$allowed_product_id    = 123;
 		$disallowed_product_id = 456;
 		$discount_code         = new Discount_Code();
 		$discount_code->set_active(true);
 		$discount_code->set_limit_products(true);
-		$discount_code->set_allowed_products(array($allowed_product_id));
+		$discount_code->set_allowed_products([$allowed_product_id]);
 
 		$result = $discount_code->is_valid($disallowed_product_id);
 
@@ -118,7 +118,7 @@ class Discount_Code_Test extends WP_UnitTestCase {
 	/**
 	 * Tests that a discount code with no product limits returns true.
 	 */
-	public function test_is_valid_no_product_limits() {
+	public function test_is_valid_no_product_limits(): void {
 		$discount_code = new Discount_Code();
 		$discount_code->set_active(true);
 		$discount_code->set_limit_products(false);

tests/WP_Ultimo/Models/Domain_Test.php

@@ -9,7 +9,7 @@ class Domain_Test extends WP_UnitTestCase {
 	/**
 	 * Test that has_valid_ssl_certificate returns true for valid SSL certificates.
 	 */
-	public function test_has_valid_ssl_certificate_with_valid_certificate() {
+	public function test_has_valid_ssl_certificate_with_valid_certificate(): void {
 		// Mocking a domain with a valid SSL certificate.
 		$domain = new Domain();
 		$domain->set_domain('dogs.4thelols.uk');
@@ -21,7 +21,7 @@ class Domain_Test extends WP_UnitTestCase {
 	/**
 	 * Test that has_valid_ssl_certificate returns false when the SSL certificate is invalid.
 	 */
-	public function test_has_valid_ssl_certificate_with_invalid_certificate() {
+	public function test_has_valid_ssl_certificate_with_invalid_certificate(): void {
 		// Mocking a domain with an invalid SSL certificate.
 		$domain = new Domain();
 		$domain->set_domain('eeeeeeeeeeeeeeeeauauexample.com');
@@ -33,7 +33,7 @@ class Domain_Test extends WP_UnitTestCase {
 	/**
 	 * Test that has_valid_ssl_certificate handles empty domain.
 	 */
-	public function test_has_valid_ssl_certificate_with_empty_domain() {
+	public function test_has_valid_ssl_certificate_with_empty_domain(): void {
 		// Mocking a domain with an empty value.
 		$domain = new Domain();
 		$domain->set_domain('');

tests/WP_Ultimo/Models/Membership_Test.php

@@ -32,9 +32,9 @@ class Membership_Test extends \WP_UnitTestCase {
 	/**
 	 * Test if the customer is allowed access to the membership.
 	 */
-	public function test_is_customer_allowed() {
+	public function test_is_customer_allowed(): void {
 		// Admins with 'manage_network' capability should always return true.
-		$admin_user_id = $this->factory()->user->create(array('role' => 'administrator'));
+		$admin_user_id = $this->factory()->user->create(['role' => 'administrator']);
 		grant_super_admin($admin_user_id);
 		wp_set_current_user($admin_user_id);
 		$this->assertTrue($this->membership->is_customer_allowed(), 'Failed asserting that admin is allowed.');
@@ -58,7 +58,7 @@ class Membership_Test extends \WP_UnitTestCase {
 	/**
 	 * Test adding a product to the membership.
 	 */
-	public function test_add_product() {
+	public function test_add_product(): void {
 		// Add a product with a specific ID and quantity.
 		$quantity = 2;
 		$faker    = new Faker();
@@ -92,7 +92,7 @@ class Membership_Test extends \WP_UnitTestCase {
 	/**
 	 * Test removing a product from the membership.
 	 */
-	public function test_remove_product() {
+	public function test_remove_product(): void {
 		// Add a product with a specific quantity.
 		$quantity = 5;
 		$faker    = new Faker();
@@ -123,7 +123,7 @@ class Membership_Test extends \WP_UnitTestCase {
 	/**
 	 * Test get_remaining_days_in_cycle() method.
 	 */
-	public function test_get_remaining_days_in_cycle() {
+	public function test_get_remaining_days_in_cycle(): void {
 		$this->membership->set_amount(12.99);
 		// Case 1: Non-recurring membership should return 10000.
 		$this->membership->set_recurring(false);

tests/WP_Ultimo/Tax/Dashboard_Taxes_Tab_Test.php

@@ -9,11 +9,11 @@ class Dashboard_Taxes_Tab_Test extends WP_UnitTestCase {
 	/**
 	 * Test that register_scripts method registers the correct scripts.
 	 */
-	public function test_register_scripts_registers_scripts() {
+	public function test_register_scripts_registers_scripts(): void {
 		// Create a mock instance of Dashboard_Admin_Page and call the register_scripts method.
 		$dashboard_admin_page = $this->getMockBuilder(Dashboard_Taxes_Tab::class)
 									->disableOriginalConstructor()
-									->setMethods(array('output'))
+									->setMethods(['output'])
 									->getMock();
 
 		// Execute register_scripts method.