test: add integration mock tests

Author: Weffe

src/__tests__/axios-api-versioning.mock.ts

@@ -0,0 +1,82 @@
+import axios from 'axios';
+import MockAdapter from 'axios-mock-adapter';
+import * as status from 'http-status-codes';
+import { withVersioning } from '../axios-api-versioning';
+import { IWithVersioningConfig, VersioningStrategy } from '../types';
+import { AxiosInstanceWithVersioning } from '../types/axios';
+
+const test_url = 'http://localhost:3000';
+const MOCK_RES = 'hello_world';
+let mock: MockAdapter;
+let instance: AxiosInstanceWithVersioning;
+
+describe('Testing correct response config of "QueryString" strategy', () => {
+    let versioningConfig: IWithVersioningConfig = {
+        apiVersion: '1.0',
+        versioningStrategy: VersioningStrategy.QueryString
+    };
+
+    beforeAll(() => {
+        instance = withVersioning(axios, versioningConfig);
+        mock = new MockAdapter(instance);
+    })
+
+    test('it should have the "apiVersion" as a query param in the response config', async () => {
+        mock.onGet(test_url)
+            .reply(status.OK, MOCK_RES);
+
+        const res = await instance.get(test_url);
+        const { params } = res.config;
+
+        expect(params).toHaveProperty('api-version');
+        expect(params['api-version']).toBe(versioningConfig.apiVersion);
+    })
+})
+
+describe('Testing correct response config of "MediaType" strategy', () => {
+    let versioningConfig: IWithVersioningConfig = {
+        apiVersion: '1.0',
+        versioningStrategy: VersioningStrategy.MediaType
+    };
+
+    beforeAll(() => {
+        instance = withVersioning(axios, versioningConfig);
+        mock = new MockAdapter(instance);
+    })
+
+    test('it should have the "apiVersion" as an accept-param in the Accept header', async () => {
+        mock.onGet(test_url)
+            .reply(status.OK, MOCK_RES);
+
+        const res = await instance.get(test_url);
+        const { headers } = res.config;
+
+        expect(headers).toHaveProperty('Accept');
+        expect(headers['Accept']).toMatch(`v=${versioningConfig.apiVersion}`)
+    })
+})
+
+describe('Testing correct response config of "UrlPath" strategy', () => {
+    let versioningConfig: IWithVersioningConfig = {
+        apiVersion: '1',
+        versioningStrategy: VersioningStrategy.UrlPath
+    };
+
+    const blank_test_url = test_url + "/v{apiVersion}";
+    const versioned_test_url = test_url + `/v${versioningConfig.apiVersion}`;
+
+    beforeAll(() => {
+        instance = withVersioning(axios, versioningConfig);
+        mock = new MockAdapter(instance);
+    })
+
+    test('it should have the "apiVersion" as a url param in the url', async () => {
+        mock.onGet(versioned_test_url)
+            .reply(status.OK, MOCK_RES);
+
+        const res = await instance.get(blank_test_url);
+        const { url } = res.config;
+
+        expect(url).toBe(versioned_test_url);
+    })
+})