fix(spanner): getTransaction type with options, cb (#8045)

* fix(spanner): getTransaction type with options, cb

* test(spanner): add test for getTransaction options cb

* test(spanner): add assert non error on get tx with cb

Co-authored-by: alkatrivedi <58396306+alkatrivedi@users.noreply.github.com>

---------

Co-authored-by: alkatrivedi <58396306+alkatrivedi@users.noreply.github.com>

Author: jvliwanag

handwritten/spanner/src/database.ts

@@ -2267,6 +2267,10 @@ class Database extends common.GrpcServiceObject {
     optionsOrCallback?: GetTransactionOptions,
   ): Promise<[Transaction]>;
   getTransaction(callback: GetTransactionCallback): void;
+  getTransaction(
+    options: GetTransactionOptions,
+    callback: GetTransactionCallback,
+  ): void;
   getTransaction(
     optionsOrCallback?: GetTransactionOptions | GetTransactionCallback,
     callback?: GetTransactionCallback,

handwritten/spanner/test/database.ts

@@ -173,6 +173,7 @@ class FakeTable {
 
 class FakeTransaction extends EventEmitter {
   calledWith_: IArguments;
+  runTransactionOptions: RunTransactionOptions | undefined;
   _options!: google.spanner.v1.ITransactionOptions;
   private _queuedMutations: google.spanner.v1.Mutation[];
   constructor(options) {
@@ -190,7 +191,9 @@ class FakeTransaction extends EventEmitter {
   setQueuedMutations(mutation) {
     this._queuedMutations = mutation;
   }
-  setReadWriteTransactionOptions(options: RunTransactionOptions) {}
+  setReadWriteTransactionOptions(options: RunTransactionOptions) {
+    this.runTransactionOptions = options;
+  }
   commit(
     options?: CommitOptions,
     callback?: CommitCallback,
@@ -2602,6 +2605,16 @@ describe('Database', () => {
       });
     });
 
+    it('should optionally accept runner `options`', done => {
+      const fakeOptions = {excludeTxnFromChangeStreams: true};
+
+      database.getTransaction(fakeOptions, (_err, transaction) => {
+        assert.ifError(_err);
+        assert.strictEqual(transaction.runTransactionOptions, fakeOptions);
+        done();
+      });
+    });
+
     it('should propagate an error', done => {
       const error = new Error('resource');
       (sandbox.stub(fakeSessionFactory, 'release') as sinon.SinonStub)