From 1cd2fb4333206e1d022d23aa5f0e74e1a59f6674 Mon Sep 17 00:00:00 2001
From: Cyrus Najmabadi <cyrusn@microsoft.com>
Date: Tue, 9 Dec 2014 17:23:14 -0800
Subject: [PATCH] Add incremental test.

---
 tests/cases/unittests/incrementalParser.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/cases/unittests/incrementalParser.ts b/tests/cases/unittests/incrementalParser.ts
index 3e51d8de8cc..2ff47f52825 100644
--- a/tests/cases/unittests/incrementalParser.ts
+++ b/tests/cases/unittests/incrementalParser.ts
@@ -408,5 +408,15 @@ module ts {
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1);
         });
+
+        it('Speculative generic lookahead 4',() => {
+            var source = "var v = F<a,b,c,d>e";
+
+            var index = source.indexOf('b');
+            var oldText = ScriptSnapshot.fromString(source);
+            var newTextAndChange = withInsert(oldText, index + 1, ",x");
+
+            compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1);
+        });
     });
 }
\ No newline at end of file