From daf4789b768444035efef2383da75011237f4ef7 Mon Sep 17 00:00:00 2001
From: topecongiro <seuchida@gmail.com>
Date: Fri, 27 Oct 2017 16:35:40 +0900
Subject: [PATCH] Add a test for #2087

---
 tests/source/macros.rs | 6 ++++++
 tests/target/macros.rs | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/tests/source/macros.rs b/tests/source/macros.rs
index 616a275876fd..73044aa7ab2c 100644
--- a/tests/source/macros.rs
+++ b/tests/source/macros.rs
@@ -21,6 +21,12 @@ fn main() {
     kaas!(/* comments */ a /* post macro */, b /* another */);
 
     trailingcomma!( a , b , c , );
+    // Preserve trailing comma only when necessary.
+    ok!(file.seek(
+        SeekFrom::Start(
+            table.map(|table| fixture.offset(table)).unwrap_or(0),
+        )
+    ));
 
     noexpr!( i am not an expression, OK? );
 
diff --git a/tests/target/macros.rs b/tests/target/macros.rs
index 394cac3820f3..a15dd14c9fb7 100644
--- a/tests/target/macros.rs
+++ b/tests/target/macros.rs
@@ -33,6 +33,10 @@ fn main() {
     );
 
     trailingcomma!(a, b, c,);
+    // Preserve trailing comma only when necessary.
+    ok!(file.seek(SeekFrom::Start(
+        table.map(|table| fixture.offset(table)).unwrap_or(0),
+    )));
 
     noexpr!( i am not an expression, OK? );