Follow-up to previous commit.

Author: carlosame

junit/io/sf/carte/doc/xml/dtd/DefaultEntityResolverTest.java

@@ -189,6 +189,7 @@ public void resolveNonexistentDeclaration() {
 
 	@Test
 	public void resolveNonexistent() {
+		// No SystemId, so it should resolve to null
 		InputSource isrc = null;
 		try {
 			isrc = resolver.resolveEntity("hi", null);
@@ -198,6 +199,17 @@ public void resolveNonexistent() {
 		assertNull(isrc);
 	}
 
+	@Test
+	public void testRegisterNonExistentPathFromSubclass() throws SAXException, IOException {
+		resolver.registerSystemIdFilename("http://www.example.com/some.dtd", "/dtd/example.dtd");
+		try {
+			resolver.resolveEntity(null, "http://www.example.com/some.dtd");
+			fail("Must throw an exception.");
+		} catch (SAXException e) {
+		}
+		classFixture(); // reset the resolver.
+	}
+
 	@Test
 	public void testRegisterInvalidPathFromSubclass() throws SAXException, IOException {
 		try {

src/io/sf/carte/doc/xml/dtd/DefaultEntityResolver.java

@@ -275,6 +275,8 @@ public final InputSource resolveEntity(String name, String publicId, String base
 				if (systemId != null) {
 					isrc.setSystemId(systemId);
 				}
+			} else {
+				throw new SAXException("Could not find resource: " + fname);
 			}
 		} else if (systemId != null) {
 			URL enturl;