fixup! bucket test async functions introduction

callback handling

Author: benzekrimaha

tests/functional/raw-node/test/GCP/bucket/head.js

@@ -23,7 +23,10 @@ describe('GCP: HEAD Bucket', () => {
         it('should return 404', async function testFn() {
             const badBucketName = this.test.bucketName;
             try {
-                await gcpClient.headBucket({ Bucket: badBucketName });
+                await new Promise((resolve, reject) => {
+                    gcpClient.headBucket({ Bucket: badBucketName },
+                        (err, res) => (err ? reject(err) : resolve(res)));
+                });
                 assert.fail('Expected 404 error, but got success');
             } catch (err) {
                 assert(err);
@@ -56,11 +59,13 @@ describe('GCP: HEAD Bucket', () => {
         });
 
         it('should get bucket information', async function testFn() {
-            const res = await gcpClient.headBucket({
-                Bucket: this.test.bucketName,
+            const res = await new Promise((resolve, reject) => {
+                gcpClient.headBucket({
+                    Bucket: this.test.bucketName,
+                }, (err, data) => (err ? reject(err) : resolve(data)));
             });
             const { $metadata, ...data } = res;
-            assert.strictEqual($metadata.httpStatusCode, 200);
+            assert.strictEqual($metadata?.httpStatusCode, 200);
             // Ensure MetaVersionId is present and non-empty
             assert.ok(
                 typeof data.MetaVersionId === 'string'