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      1 /*
      2  * Copyright (C) 2010 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 
     17 package com.android.email;
     18 
     19 import android.app.KeyguardManager;
     20 import android.content.Context;
     21 import android.os.PowerManager;
     22 import android.test.MoreAsserts;
     23 import android.test.suitebuilder.annotation.LargeTest;
     24 import android.view.View;
     25 import android.view.ViewParent;
     26 
     27 import com.android.emailcommon.Logging;
     28 import com.android.mail.utils.LogUtils;
     29 
     30 import junit.framework.AssertionFailedError;
     31 import junit.framework.TestCase;
     32 
     33 /**
     34  * Utility methods used only by tests.
     35  */
     36 @LargeTest
     37 public class TestUtils extends TestCase /* It tests itself */ {
     38     public interface Condition {
     39         public boolean isMet();
     40     }
     41 
     42     /** Shortcut to create byte array */
     43     public static byte[] b(int... array) {
     44         if (array == null) {
     45             return null;
     46         }
     47         byte[] ret = new byte[array.length];
     48         for (int i = 0; i < ret.length; i++) {
     49             ret[i] = (byte) array[i];
     50         }
     51         return ret;
     52     }
     53 
     54     public void testB() {
     55         assertNull(b(null));
     56         MoreAsserts.assertEquals(new byte[] {}, b());
     57         MoreAsserts.assertEquals(new byte[] {1, 2, (byte) 0xff}, b(1, 2, 0xff));
     58     }
     59 
     60     /**
     61      * Run {@code runnable} and fails if it doesn't throw a {@code expectedThrowable} or a subclass
     62      * of it.
     63      */
     64     public static void expectThrowable(Runnable runnable,
     65             Class<? extends Throwable> expectedThrowable) {
     66         try {
     67             runnable.run();
     68             fail("Expected throwable not thrown.");
     69         } catch (Throwable th) {
     70             if (expectedThrowable.isAssignableFrom(th.getClass())) {
     71                 return; // Expcted. OK
     72             }
     73             fail("Cought unexpected throwable " + th.getClass().getName());
     74         }
     75     }
     76 
     77     public void testExpectThrowable() {
     78         try {
     79             expectThrowable(new Runnable() {
     80                 @Override public void run() {
     81                     // Throwing no exception
     82                 }
     83             }, Throwable.class);
     84             fail();
     85         } catch (AssertionFailedError ok) {
     86         }
     87 
     88         try {
     89             expectThrowable(new Runnable() {
     90                 @Override public void run() {
     91                     // Throw RuntimeException, which is not a subclass of Error.
     92                     throw new RuntimeException();
     93                 }
     94             }, Error.class);
     95             fail();
     96         } catch (AssertionFailedError ok) {
     97         }
     98 
     99         expectThrowable(new Runnable() {
    100             @Override public void run() {
    101                 throw new RuntimeException();
    102             }
    103         }, Exception.class);
    104     }
    105 
    106     /**
    107      * Wait until a {@code Condition} is met.
    108      */
    109     public static void waitUntil(Condition condition, int timeoutSeconds) {
    110         waitUntil("", condition, timeoutSeconds);
    111     }
    112 
    113     /**
    114      * Wait until a {@code Condition} is met.
    115      */
    116     public static void waitUntil(String message, Condition condition, int timeoutSeconds) {
    117         LogUtils.d(Logging.LOG_TAG, message + ": Waiting...");
    118         final long timeout = System.currentTimeMillis() + timeoutSeconds * 1000;
    119         while (System.currentTimeMillis() < timeout) {
    120             if (condition.isMet()) {
    121                 return;
    122             }
    123             try {
    124                 Thread.sleep(500);
    125             } catch (InterruptedException ignore) {
    126             }
    127         }
    128         fail(message + ": Timeout");
    129     }
    130 
    131     public void testWaitUntil() {
    132         // Shouldn't fail.
    133         waitUntil("message", new Condition() {
    134             @Override public boolean isMet() {
    135                 return true;
    136             }
    137         }, 1000000);
    138 
    139         expectThrowable(new Runnable() {
    140             @Override public void run() {
    141                 // Condition never meets, should fail.
    142                 waitUntil("message", new Condition() {
    143                     @Override public boolean isMet() {
    144                         return false;
    145                     }
    146                 }, 0);
    147             }
    148         }, AssertionFailedError.class);
    149     }
    150 
    151     /**
    152      * @return true if the screen is on and not locked; false otherwise, in which case tests that
    153      * send key events will fail.
    154      */
    155     public static boolean isScreenOnAndNotLocked(Context context) {
    156         PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
    157         if (!pm.isScreenOn()) {
    158             return false;
    159         }
    160         KeyguardManager km = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
    161         if (km.inKeyguardRestrictedInputMode()) {
    162             return false;
    163         }
    164         return true;
    165     }
    166 
    167     public static void assertViewVisible(View v) {
    168         if (v == null) {
    169             throw new NullPointerException();
    170         }
    171         for (;;) {
    172             assertTrue("visibility for " + v, View.VISIBLE == v.getVisibility());
    173             ViewParent parent = v.getParent();
    174             if (parent == null || !(parent instanceof View)) {
    175                 break;
    176             }
    177             v = (View) parent;
    178         }
    179     }
    180 }
    181