feat: hostRules findAll function

lib/util/host-rules.ts

@@ -164,6 +164,10 @@ export function hosts({ hostType }: { hostType: string }): string[] {
     .filter(Boolean);
 }
 
+export function findAll({ hostType }: { hostType: string }): HostRule[] {
+  return hostRules.filter(rule => rule.hostType === hostType);
+}
+
 export function clear(): void {
   hostRules = [];
   sanitize.clear();

test/util/host-rules.spec.ts

-import { add, find, clear, hosts } from '../../lib/util/host-rules';
+import { add, find, findAll, clear, hosts } from '../../lib/util/host-rules';
 import { DATASOURCE_NUGET } from '../../lib/constants/data-binary-source';
 import { PLATFORM_TYPE_AZURE } from '../../lib/constants/platforms';
 
@@ -148,4 +148,21 @@ describe('util/host-rules', () => {
       expect(res).toHaveLength(2);
     });
   });
+  describe('findAll()', () => {
+    it('warns and returns empty for bad search', () => {
+      expect(findAll({ abc: 'def' } as any)).toEqual([]);
+    });
+    it('needs exact host matches', () => {
+      const hostRule = {
+        hostType: 'nuget',
+        hostName: 'nuget.org',
+        username: 'root',
+        password: 'p4$$w0rd',
+        token: undefined,
+      };
+      add(hostRule);
+      expect(findAll({ hostType: 'nuget' })).toHaveLength(1);
+      expect(findAll({ hostType: 'nuget' })[0]).toEqual(hostRule);
+    });
+  });
 });