Add fake data service

src/enums/SearchScope.ts

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+/* eslint-disable no-unused-vars */
+export enum SearchScope {
+    ArtMuseum = 'artmuseum',
+    BestBets = 'best-bet',
+    Catalog = 'catalog',
+    Dpul = 'dpul',
+    FindingAids = 'findingaids',
+    LibAnswers = 'libanswers',
+    LibGuides = 'libguides',
+    LibraryDatabases = 'database',
+    PulMap = 'pulmap'
+}

src/interfaces/SearchResult.ts

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+export interface SearchResult {
+    title: string
+    url: string
+    id: string
+    type?: string
+    publisher?: string
+    other_fields: any
+}

src/interfaces/SearchResults.ts

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+import { SearchResult } from "./SearchResult"
+
+export interface SearchResults {
+    number: number
+    more: string
+    results: SearchResult[]
+}

src/services/SearchService.test.ts

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+import { describe, test, expect } from "vitest";
+import { SearchService } from "./SearchService";
+import { SearchScope } from "../enums/SearchScope";
+
+describe('SearchService', () => {
+    describe('catalogResults()', () => {
+        test('it includes number of results', async () => {
+           const service = new SearchService();
+           const results = await service.results(SearchScope.Catalog, 'donkeys');
+           expect(results.number).toEqual(23_182); 
+        });
+        test('it includes more link', async () => {
+            const service = new SearchService();
+            const results = await service.results(SearchScope.Catalog, 'walrus');
+            expect(results.more).toEqual('https://example.com'); 
+        });
+        test('it has three results', async() => {
+            const service = new SearchService();
+            const results = await service.results(SearchScope.Catalog, 'walrus');
+            expect(results.results.length).toEqual(3);             
+        })
+     });
+});

src/services/SearchService.ts

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+/* eslint-disable no-unused-vars */
+import { SearchResults } from "../interfaces/SearchResults";
+
+export class SearchService {
+    results(service: string, query: string): Promise<SearchResults> {
+        return new Promise((resolve) => {
+            resolve({
+                number: 23_182,
+                more: 'https://example.com',
+                results: [
+                    {
+                        title: 'Potato',
+                        publisher: 'Potato company',
+                        id: '123',
+                        type: 'Book',
+                        url: 'https://catalog.princeton.edu/catalog/99125129988006421',
+                        other_fields: {}
+                    }, {
+                        title: 'Cheese',
+                        publisher: 'Cheese company',
+                        id: '456',
+                        type: 'Audio',
+                        url: 'https://catalog.princeton.edu/catalog/99125192574206421',
+                        other_fields: {}
+                    }, {
+                        title: 'Salmon',
+                        id: '789',
+                        type: 'Coin',
+                        url: 'https://catalog.princeton.edu/catalog/99125150851306421',
+                        other_fields: {}
+                    },
+                ]
+            })
+        });
+    }
+}