feat: applied coupon description field added (#572)

Author: kidunot89

includes/type/object/class-cart-type.php

@@ -618,6 +618,14 @@ public static function register_applied_coupon() {
 							return \wc_graphql_price( $tax );
 						},
 					),
+					'description'    => array(
+						'type'        => 'String',
+						'description' => __( 'Description of applied coupon', 'wp-graphql-woocommerce' ),
+						'resolve'     => function( $source, array $args ) {
+							$coupon = new \WC_Coupon( $source );
+							return $coupon->get_description();
+						},
+					),
 				),
 			)
 		);

tests/wpunit/CartMutationsTest.php

@@ -427,7 +427,8 @@ public function testApplyCouponMutation() {
 			$this->factory->coupon->create(
                 array(
                     'amount'      => 0.5,
-                    'product_ids' => array( $product_id )
+                    'product_ids' => array( $product_id ),
+					'description' => 'lorem ipsum dolor',
                 )
             )
         );
@@ -445,6 +446,7 @@ public function testApplyCouponMutation() {
                     cart {
                         appliedCoupons {
 							code
+							description
                         }
                         contents {
                             nodes {
@@ -484,7 +486,8 @@ public function testApplyCouponMutation() {
 				$this->expectedNode(
 					'applyCoupon.cart.appliedCoupons',
 					array(
-						'code' => $coupon_code,
+						'code'        => $coupon_code,
+						'description' => 'lorem ipsum dolor',
 					)
 				),
 				$this->expectedNode(