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      1 /*
      2  * Copyright (C) 2017 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 android.autofillservice.cts;
     18 
     19 import static com.google.common.truth.Truth.assertThat;
     20 
     21 import android.platform.test.annotations.AppModeFull;
     22 import android.support.test.runner.AndroidJUnit4;
     23 
     24 import org.junit.Test;
     25 import org.junit.runner.Description;
     26 import org.junit.runner.RunWith;
     27 import org.junit.runners.model.Statement;
     28 
     29 @RunWith(AndroidJUnit4.class)
     30 @AppModeFull // Unit test
     31 public class RetryRuleTest {
     32 
     33     private final Description mDescription = Description.createSuiteDescription("Whatever");
     34 
     35     private static final RetryableException sRetryableException =
     36             new RetryableException("Y U NO RETRY?");
     37 
     38     private static class RetryableStatement<T extends Exception> extends Statement {
     39         private final int mNumberFailures;
     40         private int mNumberCalls;
     41         private final T mException;
     42 
     43         RetryableStatement(int numberFailures, T exception) {
     44             mNumberFailures = numberFailures;
     45             mException = exception;
     46         }
     47 
     48         @Override
     49         public void evaluate() throws Throwable {
     50             mNumberCalls ++;
     51             if (mNumberCalls <= mNumberFailures) {
     52                 throw mException;
     53             }
     54         }
     55 
     56         @Override
     57         public String toString() {
     58             return "RetryableStatement: failures=" + mNumberFailures + ", calls=" + mNumberCalls;
     59         }
     60     }
     61 
     62     @Test
     63     public void testPassOnRetryableException() throws Throwable {
     64         final RetryRule rule = new RetryRule(2);
     65         rule.apply(new RetryableStatement<RetryableException>(1, sRetryableException), mDescription)
     66                 .evaluate();
     67     }
     68 
     69     @Test
     70     public void testPassOnRetryableExceptionWithTimeout() throws Throwable {
     71         final Timeout timeout = new Timeout("YOUR TIME IS GONE", 1, 2, 10);
     72         final RetryableException exception = new RetryableException(timeout, "Y U NO?");
     73         final RetryRule rule = new RetryRule(2);
     74         rule.apply(new RetryableStatement<RetryableException>(1, exception), mDescription)
     75                 .evaluate();
     76         // Assert timeout was increased
     77         assertThat(timeout.ms()).isEqualTo(2);
     78     }
     79 
     80     @Test
     81     public void testFailOnRetryableException() throws Throwable {
     82         final RetryRule rule = new RetryRule(2);
     83         try {
     84             rule.apply(new RetryableStatement<RetryableException>(2, sRetryableException),
     85                     mDescription).evaluate();
     86             throw new AssertionError("2ND CALL, Y U NO FAIL?");
     87         } catch (RetryableException e) {
     88             assertThat(e).isSameAs(sRetryableException);
     89         }
     90     }
     91 }
     92