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/*
* Copyright 2000-2013 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.tests.tb3;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.junit.Test;
import org.junit.runners.BlockJUnit4ClassRunner;
import org.junit.runners.Parameterized;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.InitializationError;
import org.junit.runners.model.Statement;
import org.openqa.selenium.remote.DesiredCapabilities;
import com.vaadin.tests.tb3.AbstractTB3Test.BrowserUtil;
import com.vaadin.tests.tb3.AbstractTB3Test.RunLocally;
/**
* This runner is loosely based on FactoryTestRunner by Ted Young
* (http://tedyoung.me/2011/01/23/junit-runtime-tests-custom-runners/). The
* generated test names give information about the parameters used (unlike
* {@link Parameterized}).
*
* @since 7.1
*/
public class TB3Runner extends BlockJUnit4ClassRunner {
/**
* This is the total limit of actual JUnit test instances run in parallel
*/
private static final int MAX_CONCURRENT_TESTS = 50;
/**
* This is static so it is shared by all tests running concurrently on the
* same machine and thus can limit the number of threads in use.
*/
private static final ExecutorService service = Executors
.newFixedThreadPool(MAX_CONCURRENT_TESTS);
public TB3Runner(Class<?> klass) throws InitializationError {
super(klass);
setScheduler(new ParallelScheduler(service));
}
@Override
protected List<FrameworkMethod> computeTestMethods() {
List<FrameworkMethod> tests = new LinkedList<FrameworkMethod>();
if (!AbstractTB3Test.class.isAssignableFrom(getTestClass()
.getJavaClass())) {
throw new RuntimeException(getClass().getName() + " only supports "
+ AbstractTB3Test.class.getName());
}
try {
AbstractTB3Test testClassInstance = (AbstractTB3Test) getTestClass()
.getOnlyConstructor().newInstance();
Collection<DesiredCapabilities> desiredCapabilites = testClassInstance
.getBrowsersToTest();
if (testClassInstance.getClass().getAnnotation(RunLocally.class) != null) {
desiredCapabilites = new ArrayList<DesiredCapabilities>();
desiredCapabilites.add(testClassInstance.getClass()
.getAnnotation(RunLocally.class).value()
.getDesiredCapabilities());
}
TestNameSuffix testNameSuffixProperty = findAnnotation(
testClassInstance.getClass(), TestNameSuffix.class);
for (DesiredCapabilities capabilities : desiredCapabilites) {
// Find any methods marked with @Test.
for (FrameworkMethod m : getTestClass().getAnnotatedMethods(
Test.class)) {
TB3Method method = new TB3Method(m.getMethod(),
capabilities);
if (testNameSuffixProperty != null) {
method.setTestNameSuffix("-"
+ System.getProperty(testNameSuffixProperty
.property()));
}
tests.add(method);
}
}
} catch (Exception e) {
throw new RuntimeException("Error retrieving browsers to run on", e);
}
return tests;
}
/**
* Finds the given annotation in the given class or one of its super
* classes. Return the first found annotation
*
* @param searchClass
* @param annotationClass
* @return
*/
private <T extends Annotation> T findAnnotation(Class<?> searchClass,
Class<T> annotationClass) {
if (searchClass == Object.class) {
return null;
}
if (searchClass.getAnnotation(annotationClass) != null) {
return searchClass.getAnnotation(annotationClass);
}
return findAnnotation(searchClass.getSuperclass(), annotationClass);
}
/*
* (non-Javadoc)
*
* @see
* org.junit.runners.BlockJUnit4ClassRunner#withBefores(org.junit.runners
* .model.FrameworkMethod, java.lang.Object,
* org.junit.runners.model.Statement)
*/
@Override
protected Statement withBefores(final FrameworkMethod method,
final Object target, Statement statement) {
if (!(method instanceof TB3Method)) {
throw new RuntimeException("Unexpected method type "
+ method.getClass().getName() + ", expected TB3Method");
}
final TB3Method tb3method = (TB3Method) method;
// setDesiredCapabilities before running the real @Befores (which use
// capabilities)
final Statement realBefores = super.withBefores(method, target,
statement);
return new Statement() {
@Override
public void evaluate() throws Throwable {
((AbstractTB3Test) target)
.setDesiredCapabilities(tb3method.capabilities);
try {
realBefores.evaluate();
} catch (Throwable t) {
// Give the test a chance to e.g. produce an error
// screenshot before failing the test by re-throwing the
// exception
((AbstractTB3Test) target).onUncaughtException(t);
throw t;
}
}
};
}
private static class TB3Method extends FrameworkMethod {
private DesiredCapabilities capabilities;
private String testNameSuffix = "";
public TB3Method(Method method, DesiredCapabilities capabilities) {
super(method);
this.capabilities = capabilities;
}
public void setTestNameSuffix(String testNameSuffix) {
this.testNameSuffix = testNameSuffix;
}
@Override
public Object invokeExplosively(final Object target, Object... params)
throws Throwable {
// Executes the test method with the supplied parameters
return super.invokeExplosively(target);
}
@Override
public String getName() {
return String.format("%s[%s]", getMethod().getName()
+ testNameSuffix,
BrowserUtil.getUniqueIdentifier(capabilities));
}
}
}
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