Include Javascript client into integration test

and return the promise-like result of $.ajax for API

samples/client/petstore/javascript/test/api/UserApiTest.java

@@ -0,0 +1,86 @@
+package io.swagger.petstore.test;
+
+import io.swagger.client.api.*;
+import io.swagger.client.auth.*;
+import io.swagger.client.model.*;
+
+import java.util.Arrays;
+
+import org.junit.*;
+import static org.junit.Assert.*;
+
+public class UserApiTest {
+    UserApi api = null;
+
+    @Before
+    public void setup() {
+        api = new UserApi();
+        // setup authentication
+        ApiKeyAuth apiKeyAuth = (ApiKeyAuth) api.getApiClient().getAuthentication("api_key");
+        apiKeyAuth.setApiKey("special-key");
+    }
+
+    @Test
+    public void testCreateUser() throws Exception {
+        User user = createUser();
+
+        api.createUser(user);
+
+        User fetched = api.getUserByName(user.getUsername());
+        assertEquals(user.getId(), fetched.getId());
+    }
+
+    @Test
+    public void testCreateUsersWithArray() throws Exception {
+        User user1 = createUser();
+        user1.setUsername("abc123");
+        User user2 = createUser();
+        user2.setUsername("123abc");
+
+        api.createUsersWithArrayInput(Arrays.asList(new User[]{user1, user2}));
+
+        User fetched = api.getUserByName(user1.getUsername());
+        assertEquals(user1.getId(), fetched.getId());
+    }
+
+    @Test
+    public void testCreateUsersWithList() throws Exception {
+        User user1 = createUser();
+        user1.setUsername("abc123");
+        User user2 = createUser();
+        user2.setUsername("123abc");
+
+        api.createUsersWithListInput(Arrays.asList(new User[]{user1, user2}));
+
+        User fetched = api.getUserByName(user1.getUsername());
+        assertEquals(user1.getId(), fetched.getId());
+    }
+
+    @Test
+    public void testLoginUser() throws Exception {
+        User user = createUser();
+        api.createUser(user);
+
+        String token = api.loginUser(user.getUsername(), user.getPassword());
+        assertTrue(token.startsWith("logged in user session:"));
+    }
+
+    @Test
+    public void logoutUser() throws Exception {
+        api.logoutUser();
+    }
+
+    private User createUser() {
+        User user = new User();
+        user.setId(System.currentTimeMillis());
+        user.setUsername("fred" + user.getId());
+        user.setFirstName("Fred");
+        user.setLastName("Meyer");
+        user.setEmail("fred@fredmeyer.com");
+        user.setPassword("xxXXxx");
+        user.setPhone("408-867-5309");
+        user.setUserStatus(123);
+
+        return user;
+    }
+}