add request new token method in auth service

src/api/auth.js

@@ -45,4 +45,10 @@ export default class Auth {
             return response.data.token;
         });
     }
+
+    static _requestNewToken(token, config = {}) {
+        return axios.post('/api/tokens/refresh/', token, config).then(response => {
+            return response.data.token;
+        });
+    }
 }

test/auth.js

@@ -14,13 +14,21 @@ function AuthFactory(token, localStorage = new LocalStorageMock()) {
 test('request token', t => {
     const token = '5e0651';
     const user = {email: 'test@example.org', password: 'password'};
-
     nock('https://lesspass.com').post('/api/tokens/auth/', user).reply(201, {token});
     return Auth._requestToken(user, {baseURL: 'https://lesspass.com'}).then(requestedToken => {
         t.is(requestedToken, token);
     });
 });
 
+test('request new token', t => {
+    const token = '3e3231';
+    const newToken = 'wibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9eyJzdWIiOiIxMjM0NTY3ODkwIi';
+    nock('https://lesspass.com').post('/api/tokens/refresh/', {token}).reply(200, {token: newToken});
+    return Auth._requestNewToken({token}, {baseURL: 'https://lesspass.com'}).then(refreshedToken => {
+        t.is(refreshedToken, newToken);
+    });
+});
+
 test('user first connection is guest', t => {
     const storage = new Storage(new LocalStorageMock());
     const auth = new Auth(storage);