1 files changed, 39 insertions, 0 deletions
diff --git a/remote/test/puppeteer/src/common/TaskQueue.ts b/remote/test/puppeteer/src/common/TaskQueue.ts
new file mode 100644
index 0000000000..97cfe7c769
--- /dev/null
+++ b/remote/test/puppeteer/src/common/TaskQueue.ts
@@ -0,0 +1,39 @@
+/**
+ * Copyright 2020 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @internal
+ */
+export class TaskQueue {
+  #chain: Promise<void>;
+
+  constructor() {
+    this.#chain = Promise.resolve();
+  }
+
+  postTask<T>(task: () => Promise<T>): Promise<T> {
+    const result = this.#chain.then(task);
+    this.#chain = result.then(
+      () => {
+        return undefined;
+      },
+      () => {
+        return undefined;
+      }
+    );
+    return result;
+  }
+}