fix: wrong taxonomy label case in product attributes

includes/type/interface/class-product-attribute.php

@@ -65,7 +65,7 @@ public static function get_fields() {
 				'type'        => 'String',
 				'description' => __( 'Attribute label', 'wp-graphql-woocommerce' ),
 				'resolve'     => static function ( $attribute ) {
-					return ! empty( $attribute->get_name() ) ? ucwords( preg_replace( '/(-|_)/', ' ', $attribute->get_name() ) ) : null;
+					return ! empty( $attribute->get_name() ) ? $attribute->get_name() : null;
 				},
 			],
 			'options'     => [

includes/type/object/class-product-attribute-types.php

@@ -71,7 +71,7 @@ public static function register() {
 						'description' => __( 'Attribute label', 'wp-graphql-woocommerce' ),
 						'resolve'     => static function ( $attribute ) {
 							$taxonomy = get_taxonomy( $attribute->get_name() );
-							return $taxonomy ? ucwords( $taxonomy->labels->singular_name ) : null;
+							return $taxonomy ? $taxonomy->labels->singular_name : null;
 						},
 					],
 					'name'  => [

includes/type/object/class-variation-attribute-type.php

@@ -48,9 +48,7 @@ public static function register() {
 								return null;
 							}
 
-							$slug  = \wc_attribute_taxonomy_slug( $source['name'] );
-							$label = preg_replace( '/(-|_)/', ' ', $slug );
-							return ! empty( $label ) ? ucwords( $label ) : null;
+							return \wc_attribute_taxonomy_slug( $source['name'] );
 						},
 					],
 					'name'        => [

tests/wpunit/ProductAttributeQueriesTest.php

@@ -17,8 +17,8 @@ public function expectedProductAttributeData( $product_id, $path ) {
 					$this->expectedField(
 						'label',
 						$attribute->is_taxonomy()
-							? ucwords( get_taxonomy( $attribute->get_name() )->labels->singular_name )
-							: ucwords( preg_replace( '/(-|_)/', ' ', $attribute->get_name() ) )
+							? get_taxonomy( $attribute->get_name() )->labels->singular_name
+							: $attribute->get_name()
 					),
 					$this->expectedField( 'options', $attribute->get_slugs() ),
 					$this->expectedField( 'position', $attribute->get_position() ),
@@ -170,4 +170,67 @@ static function ( $attribute ) {
 
 		$this->assertQuerySuccessful( $response, $expected );
 	}
+
+	public function testProductAttributeMatchesVariationAttributeCounterpart() {
+		$product_id    = $this->factory->product->createVariable();
+		$variation_ids = $this->factory->product_variation->createSome( $product_id )['variations'];
+
+		$query = '
+            query attributeQuery( $id: ID! ) {
+                product( id: $id ) {
+					id
+					attributes {
+						nodes {
+							name
+							label
+							options
+						}
+					}
+					... on ProductWithVariations {
+						variations {
+							nodes {
+								id
+								attributes {
+									nodes {
+										name
+										label
+										value
+									}
+								}
+							}
+						}
+					}
+                }
+            }
+        ';
+
+		$variables = [ 'id' => $this->toRelayId( 'post', $product_id ) ];
+		$response  = $this->graphql( compact( 'query', 'variables' ) );
+
+		/**
+		 * Assert that the product attributes match the variation attributes
+		 * without modification to confirm variations can be identified by product attribute.
+		 */
+		$attributes = $this->lodashGet( $response, 'data.product.attributes.nodes', [] );
+		$variations = $this->lodashGet( $response, 'data.product.variations.nodes', [] );
+
+		foreach( $variations as $variation ) {
+			$variation_attributes = $this->lodashGet( $variation, 'attributes.nodes', [] );
+			foreach( $variation_attributes as $variation_attribute ) {
+				$attribute_name = $variation_attribute['name'];
+				$attribute = array_search( $attribute_name, array_column( $attributes, 'name' ) );
+				$this->assertNotFalse( $attribute, sprintf( 'Variation attribute not found in product attributes for %s', $attribute_name ) );
+				if ( "" === $variation_attribute['value'] ) {
+					continue;
+				}
+
+				$this->assertContains( $variation_attribute['value'], $attributes[ $attribute ]['options'] );
+			}
+		}
+
+		$this->assertQuerySuccessful(
+			$response,
+			[ $this->expectedField( 'product.id', $this->toRelayId( 'post', $product_id ) ) ]
+		);
+	}
 }