feat(modelAvailabilityService): integrate model availability service into backend logic (#14470)

packages/core/src/services/modelConfigServiceTestUtils.ts

@@ -0,0 +1,23 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type { ResolvedModelConfig } from '../services/modelConfigService.js';
+
+/**
+ * Creates a ResolvedModelConfig with sensible defaults, allowing overrides.
+ */
+export const makeResolvedModelConfig = (
+  model: string,
+  overrides: Partial<ResolvedModelConfig['generateContentConfig']> = {},
+): ResolvedModelConfig =>
+  ({
+    model,
+    generateContentConfig: {
+      temperature: 0,
+      topP: 1,
+      ...overrides,
+    },
+  }) as ResolvedModelConfig;