clang-format: [JS] Support more ES6 default exports.

llvm-svn: 256759
diff --git a/clang/unittests/Format/FormatTestJS.cpp b/clang/unittests/Format/FormatTestJS.cpp
index 0013e83..2f67bdf 100644
--- a/clang/unittests/Format/FormatTestJS.cpp
+++ b/clang/unittests/Format/FormatTestJS.cpp
@@ -870,6 +870,7 @@
                "  bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n"
                "];");
   verifyFormat("export default [];");
+  verifyFormat("export default () => {};");
 }
 
 TEST_F(FormatTestJS, TemplateStrings) {