package org.jruby.test;
import junit.framework.TestCase;
import org.jruby.NativeException;
import org.jruby.Ruby;
import org.jruby.exceptions.RaiseException;
import org.jruby.javasupport.JavaEmbedUtils;
import org.jruby.runtime.builtin.IRubyObject;
/**
* Tests that a Java Exception can be thrown from Java through JRuby and
* caught again by Java (when unwrapped).
*
* Designed to test JRUBY-2652
*
* @author Rick Moynihan rick@calicojack.co.uk
*/
public class TestJavaReentrantExceptions extends TestCase {
private Ruby runtime;
public TestJavaReentrantExceptions(String name) {
super(name);
}
@Override
public void setUp() {
runtime = Ruby.newInstance();
}
public void testExceptionsAcrossTheBridge() {
final IRubyObject wrappedThrower = JavaEmbedUtils.javaToRuby(runtime, new ExceptionThrower());
boolean exceptionThrown = false;
try {
//call throwException via JRuby
JavaEmbedUtils.invokeMethod(runtime, wrappedThrower, "throwException", new Object[] { }, Object.class);
} catch(final RaiseException e) {
exceptionThrown = true;
final NativeException ne = (NativeException) e.getException();
final ExpectedException ee = (ExpectedException) ne.getCause();
assertEquals("The unpacked exception we receive should be the one we threw.",
ExceptionThrower.expectedException,ee);
} finally {
assertTrue("Java Exception should have been thrown and wrapped as a RaiseException",exceptionThrown);
}
}
}
class ExpectedException extends Exception {
}
class ExceptionThrower {
public static final ExpectedException expectedException = new ExpectedException();
public void throwException() throws ExpectedException {
throw expectedException;
}
}