Setup code quality and tests

tests/Gateway_Functions_Test.php

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+<?php
+
+namespace WP_Ultimo\Tests;
+
+use WP_Ultimo\Gateways\Manual_Gateway;
+use WP_Ultimo\Managers\Gateway_Manager;
+
+class Gateway_Functions_Test extends \WP_UnitTestCase {
+
+	public function test_wu_get_gateway_returns_false_for_invalid_id() {
+	    $invalid_gateway_id = 'non_existent_gateway';
+
+	    $result = wu_get_gateway($invalid_gateway_id);
+
+	    $this->assertFalse($result);
+	}
+
+	public function test_wu_get_gateway_returns_instance_for_valid_id() {
+	    $valid_gateway_id = 'manual';
+
+	    $gateway = wu_get_gateway($valid_gateway_id);
+
+	    $this->assertInstanceOf(Manual_Gateway::class, $gateway);
+	}
+
+}

tests/WP_Ultimo_Test.php

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+<?php
+namespace WP_Ultimo;
+
+class WP_Ultimo_Test extends \WP_UnitTestCase {
+    /**
+     * Test if all helper functions are loaded correctly.
+     *
+     * This test case creates an instance of the WP_Ultimo class and calls the load_public_apis method.
+     * It then asserts that the helper functions wu_to_float, wu_replace_dashes, and wu_get_initials are
+     * correctly loaded. Additional assertions can be added for other helper functions.
+     *
+     * @return void
+     */
+    public function testLoadAllHelperFunctionsCorrectly() {
+        // Assert that all helper functions are loaded correctly.
+	    // This is all done in the bootstrap.
+        $this->assertTrue(function_exists('wu_to_float'));
+        $this->assertTrue(function_exists('wu_replace_dashes'));
+        $this->assertTrue(function_exists('wu_get_initials'));
+    }
+
+	public function testLoaded() {
+		$wpUltimo = \WP_Ultimo();
+		$this->assertTrue($wpUltimo->version === \WP_Ultimo::VERSION);
+		$this->assertTrue($wpUltimo->is_loaded());
+	}
+
+	public function testPublicProperties() {
+		$wpUltimo = \WP_Ultimo();
+        $this->assertTrue($wpUltimo->settings instanceof Settings);
+        $this->assertTrue($wpUltimo->helper instanceof Helper);
+		$this->assertTrue($wpUltimo->notices instanceof Admin_Notices);
+		$this->assertTrue($wpUltimo->scripts instanceof Scripts);
+		$this->assertTrue($wpUltimo->currents instanceof Current);
+	}
+}

tests/bootstrap.php

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+<?php
+/**
+ * PHPUnit bootstrap file.
+ *
+ * @package Wp_Multisite_Waas
+ */
+
+$_tests_dir = getenv( 'WP_TESTS_DIR' );
+require 'vendor/yoast/phpunit-polyfills/phpunitpolyfills-autoload.php';
+if ( ! $_tests_dir ) {
+	$_tests_dir = rtrim( sys_get_temp_dir(), '/\\' ) . '/wordpress-tests-lib';
+}
+
+// Forward custom PHPUnit Polyfills configuration to PHPUnit bootstrap file.
+$_phpunit_polyfills_path = getenv( 'WP_TESTS_PHPUNIT_POLYFILLS_PATH' );
+if ( false !== $_phpunit_polyfills_path ) {
+	define( 'WP_TESTS_PHPUNIT_POLYFILLS_PATH', $_phpunit_polyfills_path );
+}
+
+if ( ! file_exists( "{$_tests_dir}/includes/functions.php" ) ) {
+	echo "Could not find {$_tests_dir}/includes/functions.php, have you run bin/install-wp-tests.sh ?" . PHP_EOL; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
+	exit( 1 );
+}
+
+// Give access to tests_add_filter() function.
+require_once "{$_tests_dir}/includes/functions.php";
+
+/**
+ * Manually load the plugin being tested.
+ */
+function _manually_load_plugin() {
+	require dirname( dirname( __FILE__ ) ) . '/wp-multisite-waas.php';
+}
+
+tests_add_filter( 'muplugins_loaded', '_manually_load_plugin' );
+
+// Start up the WP testing environment.
+require "{$_tests_dir}/includes/bootstrap.php";