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 */ 15 16 package com.android.cts.content; 17 18 import android.util.Log; 19 20 import org.junit.rules.TestRule; 21 import org.junit.runner.Description; 22 import org.junit.runners.model.Statement; 23 24 /** 25 * Rule for running flaky tests that runs the test up to attempt 26 * count and if one run succeeds reports the tests as passing. 27 */ 28 // TODO: Move this puppy in a common place, so ppl can use it. 29 public class FlakyTestRule implements TestRule { 30 private static final String LOG_TAG = FlakyTestRule.class.getSimpleName(); 31 32 private final int mAttemptCount; 33 34 public FlakyTestRule(int attemptCount) { 35 mAttemptCount = attemptCount; 36 } 37 38 @Override 39 public Statement apply(Statement statement, Description description) { 40 return new Statement() { 41 @Override 42 public void evaluate() throws Throwable { 43 Throwable throwable = null; 44 for (int i = 0; i < mAttemptCount; i++) { 45 try { 46 statement.evaluate(); 47 return; 48 } catch (Throwable t) { 49 Log.e(LOG_TAG, "Test failed ", t); 50 51 throwable = t; 52 } 53 } 54 throw throwable; 55 }; 56 }; 57 } 58 } 59
