Better ability to debug CustomFieldSerializerTest.
Explicitly hooking up the cause chain to the exception that was passed to onFailure().

Review by: jat (im)

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@5004 8db76d5a-ed1c-0410-87a9-c151d255dfc7

user/test/com/google/gwt/user/client/rpc/CustomFieldSerializerTest.java

diff --git a/user/test/com/google/gwt/user/client/rpc/CustomFieldSerializerTest.java b/user/test/com/google/gwt/user/client/rpc/CustomFieldSerializerTest.java
index 492d055..fbdfaf3 100644
--- a/user/test/com/google/gwt/user/client/rpc/CustomFieldSerializerTest.java
+++ b/user/test/com/google/gwt/user/client/rpc/CustomFieldSerializerTest.java
@@ -19,6 +19,8 @@
 import com.google.gwt.junit.client.GWTTestCase;
 import com.google.gwt.user.client.rpc.CustomFieldSerializerTestSetFactory.SerializableSubclass;
 
+import junit.framework.AssertionFailedError;
+
 /**
  * Tests the following scenarios.
  * <ul>
@@ -50,6 +52,8 @@
         CustomFieldSerializerTestSetFactory.createUnserializableSubclass(),
         new AsyncCallback() {
           public void onFailure(Throwable caught) {
+            assertTrue("Should be a SerializationException",
+                caught instanceof SerializationException);
             finishTest();
           }
 
@@ -70,7 +74,10 @@
         CustomFieldSerializerTestSetFactory.createUnserializableClass(),
         new AsyncCallback() {
           public void onFailure(Throwable caught) {
-            fail("Class UnserializableClass should be serializable because it has a custom field serializer");
+            AssertionFailedError er = new AssertionFailedError(
+                "Class UnserializableClass should be serializable because it has a custom field serializer");
+            er.initCause(caught);
+            throw er;
           }
 
           public void onSuccess(Object result) {
@@ -93,7 +100,10 @@
         CustomFieldSerializerTestSetFactory.createSerializableImmutablesArray(),
         new AsyncCallback() {
           public void onFailure(Throwable caught) {
-            fail("Could not serialize/deserialize immutable classes: " + caught);
+            AssertionFailedError er = new AssertionFailedError(
+                "Could not serialize/deserialize immutable classes");
+            er.initCause(caught);
+            throw er;
           }
 
           public void onSuccess(Object result) {
@@ -116,7 +126,10 @@
         CustomFieldSerializerTestSetFactory.createSerializableSubclass(),
         new AsyncCallback() {
           public void onFailure(Throwable caught) {
-            fail("Class UnserializableClass should be serializable because it has a custom field serializer");
+            AssertionFailedError er = new AssertionFailedError(
+                "Class SerializableSubclass should be serializable automatically");
+            er.initCause(caught);
+            throw er;
           }
 
           public void onSuccess(Object result) {