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      1 /*
      2  * Copyright (C) 2015 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.support.car.apitest;
     18 
     19 import android.util.Log;
     20 
     21 import java.util.concurrent.Semaphore;
     22 import java.util.concurrent.TimeUnit;
     23 
     24 import junit.framework.Assert;
     25 
     26 /**
     27  * A generic test action, whose run method will be called with a parameter.
     28  */
     29 public abstract class TestAction<T> {
     30     /** for passing additional test specific parameters */
     31     public volatile Object arg0;
     32     public volatile Object arg1;
     33     private static final String TAG = "CAR.TEST";
     34     private Throwable mLastThrowable;
     35     private Semaphore mWaitSemaphore = new Semaphore(0);
     36 
     37     abstract public void run(T param);
     38 
     39     public void doRun(T param) {
     40         Log.i(TAG, "TestAction doRun " + this + " param:" + param);
     41         try {
     42             run(param);
     43         } catch (Throwable t) {
     44             Log.i(TAG, "TestAction doRun get exception", t);
     45             mLastThrowable = t;
     46         }
     47         mWaitSemaphore.release();
     48     }
     49 
     50     public void assertTestRun(long timeoutMs) throws Throwable {
     51         if (!mWaitSemaphore.tryAcquire(timeoutMs, TimeUnit.MILLISECONDS)) {
     52             Assert.fail("timeout");
     53         }
     54         if (mLastThrowable != null) {
     55             throw mLastThrowable;
     56         }
     57     }
     58 
     59     public void assertNotRun(long waitMs) throws Throwable {
     60         if (!mWaitSemaphore.tryAcquire(waitMs, TimeUnit.MILLISECONDS)) {
     61             return;
     62         }
     63         if (mLastThrowable != null) {
     64             Log.e(TAG, "Action was run, but failed");
     65             throw mLastThrowable;
     66         }
     67         Assert.fail("Action was run");
     68     }
     69 
     70     public boolean waitForTest(long timeoutMs) throws Throwable {
     71         if (mWaitSemaphore.tryAcquire(timeoutMs, TimeUnit.MILLISECONDS)) {
     72             if (mLastThrowable != null) {
     73                 throw mLastThrowable;
     74             }
     75             return true;
     76         }
     77         return false;
     78     }
     79 
     80     public void resetRunState() {
     81         mWaitSemaphore.drainPermits();
     82     }
     83 
     84     public static <U> TestAction<U> buildEmptyAction() {
     85         return new TestAction<U>() {
     86             @Override
     87             public void run(U param) {
     88             }
     89         };
     90     }
     91 }
     92