fix: Preserve Marketplace.Stubbed during client copy (#4144)

Author: alexandear

github/github.go

@@ -467,7 +467,11 @@ func (c *Client) initialize() {
 	c.Issues = (*IssuesService)(&c.common)
 	c.Licenses = (*LicensesService)(&c.common)
 	c.Markdown = (*MarkdownService)(&c.common)
-	c.Marketplace = &MarketplaceService{client: c}
+	var marketplaceStubbed bool
+	if c.Marketplace != nil {
+		marketplaceStubbed = c.Marketplace.Stubbed
+	}
+	c.Marketplace = &MarketplaceService{client: c, Stubbed: marketplaceStubbed}
 	c.Meta = (*MetaService)(&c.common)
 	c.Migrations = (*MigrationService)(&c.common)
 	c.Organizations = (*OrganizationsService)(&c.common)
@@ -498,6 +502,9 @@ func (c *Client) copy() *Client {
 		RateLimitRedirectionalEndpoints: c.RateLimitRedirectionalEndpoints,
 		secondaryRateLimitReset:         c.secondaryRateLimitReset,
 	}
+	if c.Marketplace != nil {
+		clone.Marketplace = &MarketplaceService{Stubbed: c.Marketplace.Stubbed}
+	}
 	c.clientMu.Unlock()
 	if c.client != nil {
 		clone.client.Transport = c.client.Transport

github/github_test.go

@@ -508,6 +508,19 @@ func TestWithAuthToken(t *testing.T) {
 			t.Error("The header 'Authorization' must not be set")
 		}
 	})
+
+	t.Run("preserves Marketplace Stubbed field", func(t *testing.T) {
+		t.Parallel()
+
+		c := NewClient(nil)
+		c.Marketplace.Stubbed = true
+
+		c2 := c.WithAuthToken("token")
+
+		if !c2.Marketplace.Stubbed {
+			t.Fatal("WithAuthToken reset Marketplace.Stubbed; want true")
+		}
+	})
 }
 
 func TestWithEnterpriseURLs(t *testing.T) {