[NTP][Quests] Cleanup quests tests

Cleanup the tests for quests:
* Split the testing of elements into separate files to make it simpler
  when image tests are added and to simplify tests that do not need the
  entire module.
* Add an initializeModule function to hold the code that creates the
  element, sets its data, and adds it to the DOM so it doesn't have to
  be repeated in every test.
* Let layoutType and num of related searches be passed into the function
  for creating a sample cluster since it was having to be added to
  overrides in basically every test. Otherwise, we were creating the
  URLVisits twice.

Bug: 1424951
Change-Id: I023448ad57e81e640196aacb8620694aa9795395
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4342604
Reviewed-by: Marlon Facey <mfacey@google.com>
Reviewed-by: Roman Arora <romanarora@chromium.org>
Commit-Queue: Riley Tatum <rtatum@google.com>
Cr-Commit-Position: refs/heads/main@{#1118414}

chrome/browser/resources/new_tab_page/lazy_load.ts

@@ -39,6 +39,8 @@ export {FeedProxy} from './modules/feed/feed_module_proxy.js';
 export {feedDescriptor, FeedModuleElement, feedV2Descriptor} from './modules/feed/module.js';
 export {HistoryClustersProxy, HistoryClustersProxyImpl} from './modules/history_clusters/history_clusters_proxy.js';
 export {HistoryClusterLayoutType, historyClustersDescriptor, HistoryClustersModuleElement, LAYOUT_1_MIN_IMAGE_VISITS, LAYOUT_1_MIN_VISITS, LAYOUT_2_MIN_IMAGE_VISITS, LAYOUT_2_MIN_VISITS, LAYOUT_3_MIN_IMAGE_VISITS, LAYOUT_3_MIN_VISITS, MIN_RELATED_SEARCHES} from './modules/history_clusters/module.js';
+export {SuggestTileModuleElement} from './modules/history_clusters/suggest_tile.js';
+export {TileModuleElement} from './modules/history_clusters/tile.js';
 export {InfoDialogElement} from './modules/info_dialog.js';
 export {InitializeModuleCallback, Module, ModuleDescriptor, ModuleDescriptorV2, ModuleHeight} from './modules/module_descriptor.js';
 export {counterfactualLoad} from './modules/module_descriptors.js';

chrome/test/data/webui/new_tab_page/modules/history_clusters/history_clusters.gni

@@ -2,4 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-history_clusters_test_files = [ "modules/history_clusters/module_test.ts" ]
+history_clusters_test_files = [
+  "modules/history_clusters/module_test.ts",
+  "modules/history_clusters/suggest_tile_test.ts",
+  "modules/history_clusters/test_support.ts",
+  "modules/history_clusters/tile_test.ts",
+]