ExceptionHandlerInterceptorTest.java

package br.com.caelum.vraptor.interceptor;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import javax.servlet.http.HttpServletRequest;

import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import br.com.caelum.vraptor.InterceptionException;
import br.com.caelum.vraptor.Result;
import br.com.caelum.vraptor.core.ExceptionMapper;
import br.com.caelum.vraptor.core.ExceptionRecorder;
import br.com.caelum.vraptor.core.InterceptorStack;
import br.com.caelum.vraptor.resource.ResourceMethod;

public class ExceptionHandlerInterceptorTest {

	private Object instance;
	@Mock private InterceptorStack stack;
	@Mock private ResourceMethod method;
	@Mock private ExceptionMapper mapper;
	@Mock private Result result;
	@Mock private ExceptionRecorder<Result> mockRecorder;
	private ExceptionHandlerInterceptor interceptor;

	@Before
	public void setup() throws Exception {
	MockitoAnnotations.initMocks(this);
	interceptor = new ExceptionHandlerInterceptor(mapper, result);
	}
	
	@Test
	public void shouldAlwaysAccept() {
		assertTrue(interceptor.accepts(null));
	}

	/**
	 * Test when the exception is found.
	 */
	@Test
	public void withRootException() {
	final Exception e = new IllegalStateException();
	when(mapper.findByException(e)).thenReturn(mockRecorder);
	doThrow(new InterceptionException(e)).when(stack).next(method, instance);

	interceptor.intercept(stack, method, instance);
	verify(mockRecorder).replay(result);
	}

	/**
	 * Test when the exception is not found, so vraptor needs only rethrows the
	 * exception.
	 */
	@Test
	public void whenNotFoundException() {
	final Exception e = new IllegalArgumentException();
	when(mapper.findByException(e)).thenReturn(null);
	doThrow(new InterceptionException(e)).when(stack).next(method, instance);

	try {
		interceptor.intercept(stack, method, instance);
		fail("Should throw InterceptionException");
	} catch (InterceptionException e2) {
		assertEquals(e2.getCause(), e);
		}
	}
}