fix: use getBaseURL in acc_test.go to match provider URL parsing

acc_test.go was parsing GITHUB_BASE_URL with url.Parse() directly,
bypassing the normalization done by getBaseURL() in the provider. This
caused the test base URL to differ from what the provider produces
(e.g. missing trailing slash, no github.com → api.github.com rewrite,
no ghe.com API host prefix). Additionally, IsGHES was never set on the
test Config, so GHES-specific behavior was not exercised in tests.

Author: amreshh

github/acc_test.go

@@ -35,6 +35,7 @@ var (
 type testAccConfig struct {
 	// Target configuration
 	baseURL *url.URL
+	isGHES  bool
 
 	// Auth configuration
 	authMode testMode
@@ -100,19 +101,15 @@ func TestMain(m *testing.M) {
 		authMode = anonymous
 	}
 
-	u, ok := os.LookupEnv("GITHUB_BASE_URL")
-	if !ok {
-		u = DotComAPIURL
-	}
-
-	baseURL, err := url.Parse(u)
+	baseURL, isGHES, err := getBaseURL(os.Getenv("GITHUB_BASE_URL"))
 	if err != nil {
 		fmt.Printf("Error parsing base URL: %s\n", err)
 		os.Exit(1)
 	}
 
 	config := testAccConfig{
 		baseURL:                   baseURL,
+		isGHES:                    isGHES,
 		authMode:                  authMode,
 		testPublicRepository:      "terraform-provider-github",
 		testPublicRepositoryOwner: "integrations",
@@ -194,6 +191,7 @@ func getTestMeta() (*Owner, error) {
 		Token:   testAccConf.token,
 		Owner:   testAccConf.owner,
 		BaseURL: testAccConf.baseURL,
+		IsGHES:  testAccConf.isGHES,
 	}
 
 	meta, err := config.Meta()