Regression test.

Fix #480.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1581253004 .
diff --git a/test/regression/0400/0480.unit b/test/regression/0400/0480.unit
new file mode 100644
index 0000000..d18c196
--- /dev/null
+++ b/test/regression/0400/0480.unit
@@ -0,0 +1,27 @@
+>>>
+class XXXElement extends PolymerElement {
+  void attached() {
+    if (condition.containsKey('userUpdatingTest')) {
+      conditionType = TriggerValueType.userUpdatingConditionType;
+      if (condition['userUpdatingTest'].containsKey('userIsRole')) {
+        userUpdatingCriteriaSelectIndex = userValueTypeIndexFromName(condition[
+                'userUpdatingTest']['userIsRole']['user'].toString()) +
+            1;
+      }
+    }
+  }
+}
+<<<
+class XXXElement extends PolymerElement {
+  void attached() {
+    if (condition.containsKey('userUpdatingTest')) {
+      conditionType = TriggerValueType.userUpdatingConditionType;
+      if (condition['userUpdatingTest'].containsKey('userIsRole')) {
+        userUpdatingCriteriaSelectIndex = userValueTypeIndexFromName(
+                condition['userUpdatingTest']['userIsRole']['user']
+                    .toString()) +
+            1;
+      }
+    }
+  }
+}
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