/*
* Copyright 2013 Google Inc.
*
* 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.google.gwt.junit.client;
import com.google.gwt.core.shared.GwtIncompatible;
import com.google.gwt.core.shared.SerializableThrowable;
import junit.framework.Assert;
/**
* A default {@link ExceptionAsserter} that checks exception type and message.
*/
public class DefaultExceptionAsserter extends Assert implements ExceptionAsserter {
@GwtIncompatible
@Override
public void assertException(ExpectedFailure annotation, Throwable actual) {
assertAssignable(annotation.withType(), getExceptionClass(actual));
assertMessageContains(annotation.withMessage(), getExceptionMessage(actual));
}
private static void assertMessageContains(String expected, String actual) {
if (!actual.contains(expected)) {
fail("expected message: " + expected + " in: " + actual);
}
}
@GwtIncompatible
private static void assertAssignable(Class<?> expected, Class<?> exceptionClass) {
if (!expected.isAssignableFrom(exceptionClass)) {
fail("expected subclass of: " + expected + " found: " + exceptionClass);
}
}
@GwtIncompatible
private Class<?> getExceptionClass(Throwable t) {
if (t instanceof SerializableThrowable) {
try {
SerializableThrowable throwableWithClassName = (SerializableThrowable) t;
return Class.forName(throwableWithClassName.getDesignatedType());
} catch (Exception e) {
// Nothing to do here, just fallback to #getClass
}
}
return t.getClass();
}
private String getExceptionMessage(Throwable t) {
return t.getMessage() == null ? "" : t.getMessage();
}
}