Extract fakeViewState to prevent cross-test-file side effects

TileRequest.test.ts and Tolerance.test.ts imported fakeViewState from
TileIO.test.ts. When sharded across Electron processes, requiring either
file transitively loaded TileIO.test.ts and registered all its describe
blocks in the wrong shard. Both shards then ran mirukuru TileTree tests
concurrently against the same iModel, causing race-condition failures on
Windows CI.

Fix: move fakeViewState to a dedicated FakeViewState.ts utility file so
importing it no longer triggers TileIO.test.ts side effects.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: hl662

full-stack-tests/core/src/frontend/standalone/tile/FakeViewState.ts

@@ -0,0 +1,23 @@
+/*---------------------------------------------------------------------------------------------
+ * Copyright (c) Bentley Systems, Incorporated. All rights reserved.
+ * See LICENSE.md in the project root for license terms and full copyright notice.
+ *--------------------------------------------------------------------------------------------*/
+
+// Extracted from TileIO.test.ts so other test files can import fakeViewState
+// without transitively loading TileIO.test.ts's describe blocks.
+
+import { Id64String } from "@itwin/core-bentley";
+import { RenderMode, ViewFlags } from "@itwin/core-common";
+import { IModelConnection, ViewState } from "@itwin/core-frontend";
+
+export function fakeViewState(iModel: IModelConnection, options?: { visibleEdges?: boolean, renderMode?: RenderMode, is2d?: boolean, animationId?: Id64String }): ViewState {
+  return {
+    iModel,
+    is3d: () => true !== options?.is2d,
+    viewFlags: new ViewFlags({
+      renderMode: options?.renderMode ?? RenderMode.SmoothShade,
+      visibleEdges: options?.visibleEdges ?? false,
+    }),
+    displayStyle: {},
+  } as unknown as ViewState;
+}

full-stack-tests/core/src/frontend/standalone/tile/TileIO.test.ts

@@ -66,17 +66,9 @@ export class FakeREProps implements RelatedElementProps {
   public constructor() { this.id = Id64.invalid; }
 }
 
-export function fakeViewState(iModel: IModelConnection, options?: { visibleEdges?: boolean, renderMode?: RenderMode, is2d?: boolean, animationId?: Id64String }): ViewState {
-  return {
-    iModel,
-    is3d: () => true !== options?.is2d,
-    viewFlags: new ViewFlags({
-      renderMode: options?.renderMode ?? RenderMode.SmoothShade,
-      visibleEdges: options?.visibleEdges ?? false,
-    }),
-    displayStyle: {},
-  } as unknown as ViewState;
-}
+import { fakeViewState } from "./FakeViewState";
+// Re-export for any remaining consumers — other test files should import from "./FakeViewState" directly.
+export { fakeViewState } from "./FakeViewState";
 
 function delta(a: number, b: number): number {
   return Math.abs(a - b);

full-stack-tests/core/src/frontend/standalone/tile/TileRequest.test.ts

@@ -12,7 +12,7 @@ import {
 import type { FrontendStorage, TransferConfig } from "@itwin/object-storage-core/lib/frontend";
 import { TestUtility } from "../../TestUtility";
 import { TILE_DATA_2_0 } from "./data/TileIO.data.2.0";
-import { fakeViewState } from "./TileIO.test";
+import { fakeViewState } from "./FakeViewState";
 import { TestSnapshotConnection } from "../../TestSnapshotConnection";
 import { IModelTile, IModelTileContent, IModelTileTree, TileStorage } from "@itwin/core-frontend/lib/cjs/tile/internal";
 

full-stack-tests/core/src/frontend/standalone/tile/Tolerance.test.ts

@@ -14,7 +14,7 @@ import {
 } from "@itwin/core-frontend";
 import { Range3d, Range3dProps } from "@itwin/core-geometry";
 import { TestUtility } from "../../TestUtility";
-import { fakeViewState } from "./TileIO.test";
+import { fakeViewState } from "./FakeViewState";
 import { TestSnapshotConnection } from "../../TestSnapshotConnection";
 import { IModelTile, IModelTileTree } from "@itwin/core-frontend/lib/cjs/tile/internal";