Test contextual location and add first integration test

browse.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"net/http"
+	"net/url"
 )
 
 // BrowseService handles communication with the Browse API
@@ -11,24 +12,29 @@ import (
 // eBay API docs: https://developer.ebay.com/api-docs/buy/browse/overview.html
 type BrowseService service
 
-// OptContextualLocation adds the header containing contextualLocation.
+// OptBrowseContextualLocation adds the header containing contextualLocation.
 // It is strongly recommended that you use it when submitting Browse API methods.
 //
 // eBay API docs: https://developer.ebay.com/api-docs/buy/static/api-browse.html#Headers
-func OptContextualLocation(country, zip string) func(*http.Request) {
+func OptBrowseContextualLocation(country, zip string) func(*http.Request) {
 	return func(req *http.Request) {
-		// X-EBAY-C-ENDUSERCTX: contextualLocation=country=US,zip=19406
+		v := req.Header.Get(headerEndUserCtx)
+		if len(v) > 0 {
+			v += ","
+		}
+		v += "contextualLocation=" + url.QueryEscape(fmt.Sprintf("country=%s,zip=%s", country, zip))
+		req.Header.Set(headerEndUserCtx, v)
 	}
 }
 
-// Item represents a eBay item.
+// Item represents an eBay item.
 type Item struct{}
 
 // GetItem retrieves the details of a specific item.
 //
 // eBay API docs: https://developer.ebay.com/api-docs/buy/browse/resources/item/methods/getItem
 func (s *BrowseService) GetItem(ctx context.Context, itemID string, opts ...Opt) (Item, error) {
-	u := fmt.Sprintf("item/%s", itemID)
+	u := fmt.Sprintf("buy/browse/v1/item/%s", itemID)
 	req, err := s.client.NewRequest(http.MethodGet, u, opts...)
 	if err != nil {
 		return Item{}, err