1/*
2 * Copyright (C) 2012 Google Inc.
3 * Licensed to The Android Open Source Project.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18package com.android.mail.ui;
19
20import android.os.Bundle;
21import android.test.AndroidTestCase;
22import android.test.suitebuilder.annotation.SmallTest;
23import android.test.suitebuilder.annotation.Smoke;
24
25import com.android.mail.ui.ViewMode.ModeChangeListener;
26
27@Smoke
28public class ViewModeTests extends AndroidTestCase {
29    /**
30     * Saving and restoring a view mode work correctly.
31     */
32    @SmallTest
33    public void testBundleSaveRestorePreserveState() {
34        Bundle state = new Bundle();
35        ViewMode first = new ViewMode();
36        // Set the state to something known.
37        first.enterConversationListMode();
38        first.handleSaveInstanceState(state);
39        ViewMode second = new ViewMode();
40        second.handleRestore(state);
41        assertEquals(ViewMode.CONVERSATION_LIST, second.getMode());
42    }
43
44    /**
45     * Register a listener for mode changes. Change a mode, and verify that the listener was
46     * called. Then unregister the listener and change the mode again. Verify that the listener
47     * was NOT called.
48     */
49    @SmallTest
50    public void testListenerCalledAfterRegistering() {
51        class Ears implements ModeChangeListener {
52            public int numCalls = 0;
53            @Override
54            public void onViewModeChanged(int mode) {
55                numCalls++;
56            }
57        }
58
59        ViewMode mode = new ViewMode();
60        Ears ears = new Ears();
61        mode.addListener(ears);
62        mode.enterConversationListMode();
63        assertEquals(ears.numCalls, 1);
64        mode.removeListener(ears);
65        mode.enterConversationMode();
66        assertEquals(ears.numCalls, 1);
67    }
68
69    /**
70     * The view mode can transition to a state only if it isn't already in that state.
71     */
72    @SmallTest
73    public void testMultipleTransitionsFail() {
74        ViewMode first = new ViewMode();
75        // Set the state to something known.
76        first.enterConversationListMode();
77        assertEquals(ViewMode.CONVERSATION_LIST, first.getMode());
78        // Cannot transition to Conversation List mode. I'm in it already.
79        first.enterConversationListMode();
80        assertEquals(ViewMode.CONVERSATION_LIST, first.getMode());
81    }
82}