feat(resolve-check-config): add ability to use a config file to adjust jobs (#255)

resolve-check-config/src/tier-map.spec.ts

@@ -0,0 +1,46 @@
+import { isTier, servicesForTiers, TIER_TO_SERVICES } from './tier-map';
+
+describe('isTier', () => {
+  it('accepts every key in TIER_TO_SERVICES', () => {
+    for (const tier of Object.keys(TIER_TO_SERVICES)) {
+      expect(isTier(tier)).toBe(true);
+    }
+  });
+
+  it('rejects unknown strings', () => {
+    expect(isTier('llm')).toBe(false);
+    expect(isTier('')).toBe(false);
+  });
+
+  it('rejects non-strings', () => {
+    expect(isTier(42)).toBe(false);
+    expect(isTier(null)).toBe(false);
+    expect(isTier(undefined)).toBe(false);
+  });
+});
+
+describe('servicesForTiers', () => {
+  it('returns an empty set for an empty tier list', () => {
+    expect([...servicesForTiers([])]).toEqual([]);
+  });
+
+  it('expands a single tier to its concrete service names', () => {
+    expect([...servicesForTiers(['queue'])]).toEqual(['rabbitmq']);
+  });
+
+  it('expands the search tier to both implementations', () => {
+    expect([...servicesForTiers(['search'])].sort()).toEqual(['elasticsearch', 'opensearch']);
+  });
+
+  it('expands the web tier to nginx + php-fpm', () => {
+    expect([...servicesForTiers(['web'])].sort()).toEqual(['nginx', 'php-fpm']);
+  });
+
+  it('unions across multiple tiers', () => {
+    expect([...servicesForTiers(['cache', 'queue'])].sort()).toEqual(['rabbitmq', 'redis', 'valkey']);
+  });
+
+  it('deduplicates if the same tier appears twice', () => {
+    expect([...servicesForTiers(['queue', 'queue'])]).toEqual(['rabbitmq']);
+  });
+});