add tests

test/index.js

@@ -9,7 +9,39 @@
 'use strict';
 
 const test = require ('ava');
+const mock_server = require ('../mock_server');
+const client = require ('@scode/auth-client-helper');
 
-test ('', () => {
-
+test.before (async () => {
+  await mock_server.start_server ();
+});
+
+test ('login', async (t) => {
+  const session = await client.login (
+    'testuser',
+    'foo',
+    'http://localhost:3000'
+  );
+
+  t.is (typeof session, 'string');
+});
+
+test ('reject invalid user', async (t) => {
+  const session = await client.login (
+    'foo',
+    'foo',
+    'http://localhost:3000'
+  );
+
+  t.is (typeof session, 'string');
+});
+
+test ('reject invalid password', async (t) => {
+  const session = await client.login (
+    'testuser',
+    'bar',
+    'http://localhost:3000'
+  );
+
+  t.is (typeof session, 'string');
 });