diff --git a/static_src/shared/test/constants-hotlists.js b/static_src/shared/test/constants-hotlists.js
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+++ b/static_src/shared/test/constants-hotlists.js
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+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import * as issueV0 from './constants-issueV0.js';
+import * as users from './constants-users.js';
+import 'shared/typedef.js';
+
+/** @type {string} */
+export const NAME = 'hotlists/1234';
+
+/** @type {Hotlist} */
+export const HOTLIST = Object.freeze({
+  name: NAME,
+  displayName: 'Hotlist-Name',
+  owner: users.NAME,
+  editors: [users.NAME_2],
+  summary: 'Summary',
+  description: 'Description',
+  defaultColumns: [{column: 'Rank'}, {column: 'ID'}, {column: 'Summary'}],
+  hotlistPrivacy: 'PUBLIC',
+});
+
+export const HOTLIST_ITEM_NAME = NAME + '/items/56';
+
+/** @type {HotlistItem} */
+export const HOTLIST_ITEM = Object.freeze({
+  name: HOTLIST_ITEM_NAME,
+  issue: issueV0.NAME,
+  // rank: The API excludes the rank field if it's 0.
+  adder: users.NAME,
+  createTime: '2020-01-01T12:00:00Z',
+});
+
+/** @type {HotlistIssue} */
+export const HOTLIST_ISSUE = Object.freeze({
+  ...issueV0.ISSUE, ...HOTLIST_ITEM, adder: users.USER,
+});
+
+/** @type {HotlistItem} */
+export const HOTLIST_ITEM_OTHER_PROJECT = Object.freeze({
+  name: NAME + '/items/78',
+  issue: issueV0.NAME_OTHER_PROJECT,
+  rank: 1,
+  adder: users.NAME,
+  createTime: '2020-01-01T12:00:00Z',
+});
+
+/** @type {HotlistIssue} */
+export const HOTLIST_ISSUE_OTHER_PROJECT = Object.freeze({
+  ...issueV0.ISSUE_OTHER_PROJECT,
+  ...HOTLIST_ITEM_OTHER_PROJECT,
+  adder: users.USER,
+});
+
+/** @type {HotlistItem} */
+export const HOTLIST_ITEM_CLOSED = Object.freeze({
+  name: NAME + '/items/90',
+  issue: issueV0.NAME_CLOSED,
+  rank: 2,
+  adder: users.NAME,
+  createTime: '2020-01-01T12:00:00Z',
+});
+
+/** @type {HotlistIssue} */
+export const HOTLIST_ISSUE_CLOSED = Object.freeze({
+  ...issueV0.ISSUE_CLOSED, ...HOTLIST_ITEM_CLOSED, adder: users.USER,
+});
+
+/** @type {Object<string, Hotlist>} */
+export const BY_NAME = Object.freeze({[NAME]: HOTLIST});
+
+/** @type {Object<string, Array<HotlistItem>>} */
+export const HOTLIST_ITEMS = Object.freeze({
+  [NAME]: [HOTLIST_ITEM],
+});