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      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 
     18 package com.android.mail.ui;
     19 
     20 import android.os.Bundle;
     21 import android.test.AndroidTestCase;
     22 import android.test.suitebuilder.annotation.SmallTest;
     23 import android.test.suitebuilder.annotation.Smoke;
     24 
     25 import com.android.mail.ui.ViewMode.ModeChangeListener;
     26 
     27 @Smoke
     28 public 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 }