Added non-built-in shipping provider update test.

tests/unit-tests/util/install.php

@@ -89,6 +89,11 @@ public function test_install() {
 	 * Test - install.
 	 */
 	public function test_install_non_built_in_providers() {
+		// Make sure the DHL Package loads - Base country should equal DE.
+		tests_add_filter( 'woocommerce_gzd_dhl_base_country', function () {
+			return 'AT';
+		} );
+
 		// clean existing installation first
 		if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
 			define( 'WP_UNINSTALL_PLUGIN', true );
@@ -99,10 +104,6 @@ public function test_install_non_built_in_providers() {
 
 		remove_all_filters( 'woocommerce_gzd_shipping_provider_class_names' );
 
-		update_option( 'woocommerce_gzd_shipments_shipper_address_country', 'AT' );
-		update_option( 'woocommerce_gzd_dhl_version', '1.0' );
-		update_option( 'woocommerce_default_country', 'AT' );
-
 		var_dump( \Vendidero\Germanized\Shipments\Package::get_base_country() );
 		var_dump( \Vendidero\Germanized\DHL\Package::has_dependencies() );