backend/remote-state/gcs: Move toBucketName to the tests.

backend/remote-state/gcs/backend.go

@@ -94,7 +94,7 @@ func (b *gcsBackend) configure(ctx context.Context) error {
 
 	data := schema.FromContextBackendConfig(b.storageContext)
 
-	b.bucketName = toBucketName(data.Get("bucket").(string))
+	b.bucketName = data.Get("bucket").(string)
 	b.prefix = strings.TrimLeft(data.Get("prefix").(string), "/")
 
 	b.defaultStateFile = strings.TrimLeft(data.Get("path").(string), "/")
@@ -144,39 +144,3 @@ func (b *gcsBackend) ensureBucketExists() error {
 
 	return b.storageClient.Bucket(b.bucketName).Create(b.storageContext, b.projectID, attrs)
 }
-
-// toBucketName returns a copy of in that is suitable for use as a bucket name.
-// All upper case characters are converted to lower case, other invalid
-// characters are replaced by '_'.
-func toBucketName(in string) string {
-	// Bucket names must contain only lowercase letters, numbers, dashes
-	// (-), and underscores (_).
-	isValid := func(r rune) bool {
-		switch {
-		case r >= 'a' && r <= 'z':
-			return true
-		case r >= '0' && r <= '9':
-			return true
-		case r == '-' || r == '_':
-			return true
-		default:
-			return false
-
-		}
-	}
-
-	out := make([]rune, 0, len(in))
-	for _, r := range strings.ToLower(in) {
-		if !isValid(r) {
-			r = '_'
-		}
-		out = append(out, r)
-	}
-
-	// Bucket names must contain 3 to 63 characters.
-	if len(out) > 63 {
-		out = out[:63]
-	}
-
-	return string(out)
-}

backend/remote-state/gcs/backend_test.go

@@ -3,6 +3,7 @@ package gcs
 import (
 	"fmt"
 	"os"
+	"strings"
 	"testing"
 
 	"github.com/hashicorp/terraform/backend"
@@ -117,7 +118,7 @@ func setupBackend(t *testing.T) backend.Backend {
 
 	config := map[string]interface{}{
 		"project": projectID,
-		"bucket":  projectID + "-" + t.Name(),
+		"bucket":  toBucketName(projectID + "-" + t.Name()),
 		"prefix":  "",
 	}
 
@@ -166,3 +167,39 @@ func teardownBackend(t *testing.T, be backend.Backend) {
 		t.Fatalf("deleting bucket failed: %v; manual cleanup may be required, though later test runs will happily reuse an existing bucket", err)
 	}
 }
+
+// toBucketName returns a copy of in that is suitable for use as a bucket name.
+// All upper case characters are converted to lower case, other invalid
+// characters are replaced by '_'.
+func toBucketName(in string) string {
+	// Bucket names must contain only lowercase letters, numbers, dashes
+	// (-), and underscores (_).
+	isValid := func(r rune) bool {
+		switch {
+		case r >= 'a' && r <= 'z':
+			return true
+		case r >= '0' && r <= '9':
+			return true
+		case r == '-' || r == '_':
+			return true
+		default:
+			return false
+
+		}
+	}
+
+	out := make([]rune, 0, len(in))
+	for _, r := range strings.ToLower(in) {
+		if !isValid(r) {
+			r = '_'
+		}
+		out = append(out, r)
+	}
+
+	// Bucket names must contain 3 to 63 characters.
+	if len(out) > 63 {
+		out = out[:63]
+	}
+
+	return string(out)
+}