Add preliminary test for Wikipedia API

src/tests/WikipediaAPI.test.ts

@@ -0,0 +1,95 @@
+import { enableFetchMocks } from 'jest-fetch-mock';
+import fetchMock from 'jest-fetch-mock';
+import { WikipediaAPI } from '../api/apis/WikipediaAPI';
+import { WikiModel } from '../models/WikiModel';
+import { MediaTypeModel } from '../models/MediaTypeModel';
+
+enableFetchMocks()
+let wikiInstance: WikipediaAPI;
+
+beforeEach(() => {
+    fetchMock.resetMocks();
+    wikiInstance = new WikipediaAPI(new (jest.fn())());
+})
+
+test("searchByTitle behavior when given garbage data", async () => {
+    fetchMock.mockResponseOnce(JSON.stringify({
+        data: "string"
+    }))
+    await expect(async () => await wikiInstance.searchByTitle("sample")).rejects.toThrow();
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+});
+
+test("searchByTitle when fetch returns non-200", async () => {
+    let sampleResponse = {
+        data: "string"
+    };
+    fetchMock.mockResponse(JSON.stringify(sampleResponse), {status: 400});
+    await expect(async () => await wikiInstance.searchByTitle("sample")).rejects.toThrow();
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+});
+
+test("searchByTitle with successful request and valid response", async () => {
+    let response = {
+        "batchcomplete": "",
+        "continue": {
+            "sroffset": 20,
+            "continue": "-||"
+        },
+        "query": {
+            "searchinfo": {
+                "totalhits": 214380
+            },
+            "search": [
+                {
+                    "ns": 0,
+                    "title": "Jackson",
+                    "pageid": 15772,
+                    "size": 3524,
+                    "wordcount": 392,
+                    "timestamp": "2022-06-16T07:22:28Z"
+                },
+                {
+                    "ns": 0,
+                    "title": "Michael Jackson",
+                    "pageid": 14995351,
+                    "size": 257103,
+                    "wordcount": 23309,
+                    "timestamp": "2022-06-29T01:15:25Z"
+                },
+                {
+                    "ns": 0,
+                    "title": "Andrew Jackson",
+                    "pageid": 1623,
+                    "size": 200137,
+                    "wordcount": 22743,
+                    "timestamp": "2022-07-03T17:53:13Z"
+                },
+                {
+                    "ns": 0,
+                    "title": "Janet Jackson",
+                    "pageid": 60070,
+                    "size": 206594,
+                    "wordcount": 21067,
+                    "timestamp": "2022-06-24T19:40:30Z"
+                }
+            ]
+        }
+    };
+    fetchMock.mockResponse(JSON.stringify(response));
+    let ret: MediaTypeModel[] = [];
+
+    for (const result of response.query.search) {
+        ret.push(new WikiModel({
+            type: 'wiki',
+            title: result.title,
+            englishTitle: result.title,
+            year: '',
+            dataSource: 'Wikipedia API',
+            id: result.pageid,
+        } as unknown as WikiModel));
+    }
+    let dt = await wikiInstance.searchByTitle("Jackson");
+    expect(dt).toStrictEqual(ret);
+
+})