Tests: Clear API mocks between each test

app/soapbox/__mocks__/api.js

@@ -4,6 +4,7 @@ const api = jest.requireActual('../api').default;
 let mocks = [];
 
 export const __stub = func => mocks.push(func);
+export const __clear = () => mocks = [];
 
 const setupMock = axios => {
   const mock = new MockAdapter(axios);

app/soapbox/actions/__tests__/about-test.js

@@ -12,7 +12,7 @@ const middlewares = [thunk];
 const mockStore = configureMockStore(middlewares);
 
 describe('fetchAboutPage()', () => {
-  beforeAll(() => stubApi(mock => {
+  beforeEach(() => stubApi(mock => {
     mock.onGet('/instance/about/index.html').reply(200, '<h1>Hello world</h1>');
   }));
 

app/soapbox/test_setup.js

@@ -2,8 +2,10 @@
 
 import { configure } from 'enzyme';
 import Adapter from 'enzyme-adapter-react-16';
+import { __clear as clearApiMocks } from 'soapbox/api';
 
 const adapter = new Adapter();
 configure({ adapter });
 
 jest.mock('soapbox/api');
+afterEach(() => clearApiMocks());