Changed Elements Test Fix (#1069)

* fix: test changed elements processing by starting at baseline since now we only support rolling forward.

* rush change

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

common/changes/@bentley/imodeljs-backend/changed-elements-test-fix_2021-03-30-13-19.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@bentley/imodeljs-backend",
+      "comment": "Fix tests for changed elements processing",
+      "type": "none"
+    }
+  ],
+  "packageName": "@bentley/imodeljs-backend",
+  "email": "4107657+diegopinate@users.noreply.github.com"
+}

core/backend/src/test/integration/ChangedElements.test.ts

@@ -3,15 +3,15 @@
 * See LICENSE.md in the project root for license terms and full copyright notice.
 *--------------------------------------------------------------------------------------------*/
 import { DbResult, GuidString } from "@bentley/bentleyjs-core";
-import { IModelError } from "@bentley/imodeljs-common";
+import { IModelError, IModelVersion } from "@bentley/imodeljs-common";
 import { TestUsers, TestUtility } from "@bentley/oidc-signin-tool";
 import { assert } from "chai";
 import { ChangedElementsManager } from "../../ChangedElementsManager";
 import { AuthorizedBackendRequestContext, BriefcaseManager, ChangedElementsDb, IModelHost, IModelJsFs, ProcessChangesetOptions } from "../../imodeljs-backend";
 import { IModelTestUtils } from "../IModelTestUtils";
 import { HubUtility } from "./HubUtility";
 
-describe.skip("ChangedElements (#integration)", () => {
+describe("ChangedElements (#integration)", () => {
   let requestContext: AuthorizedBackendRequestContext;
   let testContextId: GuidString;
   let testIModelId: GuidString;
@@ -34,7 +34,7 @@ describe.skip("ChangedElements (#integration)", () => {
     if (IModelJsFs.existsSync(cacheFilePath))
       IModelJsFs.removeSync(cacheFilePath);
 
-    const iModel = await IModelTestUtils.downloadAndOpenCheckpoint({ requestContext, contextId: testContextId, iModelId: testIModelId });
+    const iModel = await IModelTestUtils.downloadAndOpenCheckpoint({ requestContext, contextId: testContextId, iModelId: testIModelId, asOf: IModelVersion.first().toJSON() });
     const changeSets = await IModelHost.iModelClient.changeSets.get(requestContext, testIModelId);
     assert.exists(iModel);