package com.googlecode.gwt.test.csv.internal;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.internal.runners.InitializationError;
import org.junit.internal.runners.TestClass;
import com.googlecode.gwt.test.internal.junit.GwtJUnit4ClassRunner;
import com.googlecode.gwt.test.utils.GwtReflectionUtils;
@SuppressWarnings("deprecation")
public class GwtJUnit4CsvClassRunner extends GwtJUnit4ClassRunner {
class CsvMethodValidator {
private final List<Throwable> fErrors = new ArrayList<Throwable>();
private final TestClass fTestClass;
public CsvMethodValidator(TestClass testClass) {
fTestClass = testClass;
}
public void assertValid() throws InitializationError {
if (!fErrors.isEmpty())
throw new InitializationError(fErrors);
}
public void validateInstanceMethods() {
validateTestMethods(After.class, false);
validateTestMethods(Before.class, false);
validateTestMethods(Test.class, false);
List<Method> methods = reader.getTestMethods();
if (methods.size() == 0)
fErrors.add(new Exception("No runnable methods"));
}
public List<Throwable> validateMethodsForDefaultRunner() {
validateNoArgConstructor();
validateStaticMethods();
validateInstanceMethods();
return fErrors;
}
public void validateNoArgConstructor() {
try {
fTestClass.getConstructor();
} catch (Exception e) {
fErrors.add(new Exception("Test class should have public zero-argument constructor", e));
}
}
public void validateStaticMethods() {
validateTestMethods(BeforeClass.class, true);
validateTestMethods(AfterClass.class, true);
}
private void validateTestMethods(Class<? extends Annotation> annotation, boolean isStatic) {
List<Method> methods = fTestClass.getAnnotatedMethods(annotation);
for (Method each : methods) {
if (Modifier.isStatic(each.getModifiers()) != isStatic) {
String state = isStatic ? "should" : "should not";
fErrors.add(new Exception("Method " + each.getName() + "() " + state + " be static"));
}
if (!Modifier.isPublic(each.getDeclaringClass().getModifiers()))
fErrors.add(new Exception("Class " + each.getDeclaringClass().getName()
+ " should be public"));
if (!Modifier.isPublic(each.getModifiers()))
fErrors.add(new Exception("Method " + each.getName() + " should be public"));
if (each.getReturnType() != Void.TYPE)
fErrors.add(new Exception("Method " + each.getName() + " should be void"));
if (each.getParameterTypes().length != 0)
fErrors.add(new Exception("Method " + each.getName() + " should have no parameters"));
}
}
}
private DirectoryTestReader reader;
public GwtJUnit4CsvClassRunner(Class<?> clazz) throws InitializationError,
ClassNotFoundException {
super(clazz);
}
@Override
protected Object createTest() throws Exception {
Object testInstance = reader.createObject();
GwtReflectionUtils.callPrivateMethod(testInstance, "setReader", reader);
return testInstance;
}
@Override
protected List<Method> getTestMethods() {
if (reader == null) {
reader = new DirectoryTestReader(hackyGetTestClass().getJavaClass());
}
return reader.getTestMethods();
}
@Override
protected void validate() throws InitializationError {
CsvMethodValidator methodValidator = new CsvMethodValidator(hackyGetTestClass());
methodValidator.validateMethodsForDefaultRunner();
methodValidator.assertValid();
}
/*
* Hack for JUnit 4.4 or lower
*/
private TestClass hackyGetTestClass() {
return GwtReflectionUtils.callPrivateMethod(this, "getTestClass");
}
}