fix: support uint8array in file.save

src/file.ts

@@ -93,7 +93,11 @@ export interface PolicyDocument {
   signature: string;
 }
 
-export type SaveData = string | Buffer | PipelineSource<string | Buffer>;
+export type SaveData =
+  | string
+  | Buffer
+  | Uint8Array
+  | PipelineSource<string | Buffer | Uint8Array>;
 
 export type GenerateSignedPostPolicyV2Response = [PolicyDocument];
 
@@ -3916,7 +3920,11 @@ class File extends ServiceObject<File, FileMetadata> {
             return bail(err);
           };
 
-          if (typeof data === 'string' || Buffer.isBuffer(data)) {
+          if (
+            typeof data === 'string' ||
+            Buffer.isBuffer(data) ||
+            data instanceof Uint8Array
+          ) {
             writable
               .on('error', handleError)
               .on('finish', () => resolve())

test/file.ts

@@ -4281,6 +4281,9 @@ describe('File', () => {
   describe('save', () => {
     const DATA = 'Data!';
     const BUFFER_DATA = Buffer.from(DATA, 'utf8');
+    const UINT8_ARRAY_DATA = Uint8Array.from(
+      Array.from(DATA).map(l => l.charCodeAt(0))
+    );
 
     class DelayedStreamNoError extends Transform {
       _transform(chunk: string | Buffer, _encoding: string, done: Function) {
@@ -4318,6 +4321,22 @@ describe('File', () => {
         await file.save(DATA, options, assert.ifError);
       });
 
+      it('should save a buffer with no errors', async () => {
+        const options = {resumable: false};
+        file.createWriteStream = () => {
+          return new DelayedStreamNoError();
+        };
+        await file.save(BUFFER_DATA, options, assert.ifError);
+      });
+
+      it('should save a Uint8Array with no errors', async () => {
+        const options = {resumable: false};
+        file.createWriteStream = () => {
+          return new DelayedStreamNoError();
+        };
+        await file.save(UINT8_ARRAY_DATA, options, assert.ifError);
+      });
+
       it('string upload should retry on first failure', async () => {
         const options = {
           resumable: false,
@@ -4363,15 +4382,28 @@ describe('File', () => {
         }
       });
 
-      it('should save a buffer with no errors', async () => {
+      it('should save a Readable with no errors (String)', done => {
         const options = {resumable: false};
         file.createWriteStream = () => {
-          return new DelayedStreamNoError();
+          const writeStream = new PassThrough();
+          writeStream.on('data', data => {
+            assert.strictEqual(data.toString(), DATA);
+          });
+          writeStream.once('finish', done);
+          return writeStream;
         };
-        await file.save(DATA, options, assert.ifError);
+
+        const readable = new Readable({
+          read() {
+            this.push(DATA);
+            this.push(null);
+          },
+        });
+
+        void file.save(readable, options);
       });
 
-      it('should save a Readable with no errors', done => {
+      it('should save a Readable with no errors (Buffer)', done => {
         const options = {resumable: false};
         file.createWriteStream = () => {
           const writeStream = new PassThrough();
@@ -4384,7 +4416,28 @@ describe('File', () => {
 
         const readable = new Readable({
           read() {
-            this.push(DATA);
+            this.push(BUFFER_DATA);
+            this.push(null);
+          },
+        });
+
+        void file.save(readable, options);
+      });
+
+      it('should save a Readable with no errors (Uint8Array)', done => {
+        const options = {resumable: false};
+        file.createWriteStream = () => {
+          const writeStream = new PassThrough();
+          writeStream.on('data', data => {
+            assert.strictEqual(data.toString(), DATA);
+          });
+          writeStream.once('finish', done);
+          return writeStream;
+        };
+
+        const readable = new Readable({
+          read() {
+            this.push(UINT8_ARRAY_DATA);
             this.push(null);
           },
         });