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756a3b41e1
This change added the implementation of screenshot comparison with ChromeWebDriver which will be used in the open-source code base. This change also set a default window size(1200x2000) for each screenshot test. This is to make the size of screenshot deterministic to help build the screenshot comparison tests. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=235539713
73 lines
2.3 KiB
Java
73 lines
2.3 KiB
Java
// Copyright 2019 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.webdriver;
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import com.google.common.flogger.FluentLogger;
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import org.junit.runners.BlockJUnit4ClassRunner;
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import org.junit.runners.model.FrameworkMethod;
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import org.junit.runners.model.InitializationError;
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import org.junit.runners.model.Statement;
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/**
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* A JUnit test runner which can retry each test up to 3 times.
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*
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* <p>This runner is for our visual regression to prevent flakes
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* during the run. The test is repeated multiple times until it
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* passes and it only fails if it failed 3 times.
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*/
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public class RepeatableRunner extends BlockJUnit4ClassRunner {
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private static final FluentLogger logger = FluentLogger.forEnclosingClass();
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private static final int MAX_ATTEMPTS = 3;
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/** Constructs a new instance of the default runner */
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public RepeatableRunner(Class<?> klass) throws InitializationError {
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super(klass);
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}
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@Override
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protected Statement methodBlock(FrameworkMethod method) {
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Statement statement = super.methodBlock(method);
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return new RepeatableStatement(statement, method);
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}
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private static class RepeatableStatement extends Statement {
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private Statement statement;
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private FrameworkMethod method;
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public RepeatableStatement(Statement statement, FrameworkMethod method) {
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this.statement = statement;
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this.method = method;
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}
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@Override
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public void evaluate() throws Throwable {
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for (int i = 1; i <= MAX_ATTEMPTS; i++) {
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try {
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statement.evaluate();
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return;
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} catch (Throwable e) {
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logger.atSevere().log(
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"[%s] Attempt %d of %d failed!\n", method.getName(), i, MAX_ATTEMPTS);
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if (i == MAX_ATTEMPTS) {
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throw e;
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}
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}
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}
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}
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}
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}
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