1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.content;
18
19import android.content.ContentQueryMap;
20import android.content.ContentResolver;
21import android.content.ContentValues;
22import android.database.Cursor;
23import android.os.Handler;
24import android.os.Looper;
25import android.provider.Settings;
26import android.test.AndroidTestCase;
27import android.test.suitebuilder.annotation.MediumTest;
28
29import java.util.Observable;
30import java.util.Observer;
31
32/** Test of {@link ContentQueryMap} */
33public class ContentQueryMapTest extends AndroidTestCase {
34    /** Helper class to run test code in a new thread with a Looper. */
35    private abstract class LooperThread extends Thread {
36        public Throwable mError = null;
37        public boolean mSuccess = false;
38
39        abstract void go();
40
41        public void run() {
42            try {
43                Looper.prepare();
44                go();
45                Looper.loop();
46            } catch (Throwable e) {
47                mError = e;
48            }
49        }
50    }
51
52    @MediumTest
53    public void testContentQueryMap() throws Throwable {
54        LooperThread thread = new LooperThread() {
55            void go() {
56                ContentResolver r = getContext().getContentResolver();
57                Settings.System.putString(r, "test", "Value");
58                Cursor cursor = r.query(
59                        Settings.System.CONTENT_URI,
60                        new String[] {
61                            Settings.System.NAME,
62                            Settings.System.VALUE,
63                        }, null, null, null);
64
65                final ContentQueryMap cqm = new ContentQueryMap(
66                        cursor, Settings.System.NAME, true, null);
67                // Get the current state of the CQM. This forces a requery and means that the
68                // call to getValues() below won't do a requery().
69                cqm.getRows();
70
71                // The cache won't notice changes until the loop runs.
72                Settings.System.putString(r, "test", "New Value");
73                ContentValues v = cqm.getValues("test");
74                String value = v.getAsString(Settings.System.VALUE);
75                assertEquals("Value", value);
76
77                // Use an Observer to find out when the cache does update.
78                cqm.addObserver(new Observer() {
79                    public void update(Observable o, Object arg) {
80                        // Should have the new values by now.
81                        ContentValues v = cqm.getValues("test");
82                        String value = v.getAsString(Settings.System.VALUE);
83                        assertEquals("New Value", value);
84                        Looper.myLooper().quit();
85                        cqm.close();
86                        mSuccess = true;
87                    }
88                });
89
90                // Give up after a few seconds, if it doesn't.
91                new Handler().postDelayed(new Runnable() {
92                    public void run() {
93                        fail("Timed out");
94                    }
95                }, 5000);
96            }
97        };
98
99        thread.start();
100        thread.join();
101        if (thread.mError != null) throw thread.mError;
102        assertTrue(thread.mSuccess);
103    }
104}
105