1 files changed, 41 insertions, 0 deletions
diff --git a/deps/v8/test/unittests/parser/preparser-unittest.cc b/deps/v8/test/unittests/parser/preparser-unittest.cc
new file mode 100644
index 0000000000..26f5cd5ab3
--- /dev/null
+++ b/deps/v8/test/unittests/parser/preparser-unittest.cc
@@ -0,0 +1,41 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/api.h"
+#include "src/objects-inl.h"
+#include "test/unittests/test-helpers.h"
+#include "test/unittests/test-utils.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace v8 {
+namespace internal {
+
+class PreParserTest : public TestWithContext {
+ public:
+  PreParserTest() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PreParserTest);
+};
+
+TEST_F(PreParserTest, LazyFunctionLength) {
+  const char* script_source = "function lazy(a, b, c) { } lazy";
+
+  Handle<Object> lazy_object = test::RunJS(isolate(), script_source);
+
+  Handle<SharedFunctionInfo> shared(
+      Handle<JSFunction>::cast(lazy_object)->shared(), i_isolate());
+  CHECK_EQ(shared->length(), SharedFunctionInfo::kInvalidLength);
+
+  const char* get_length_source = "lazy.length";
+
+  Handle<Object> length = test::RunJS(isolate(), get_length_source);
+  CHECK(length->IsSmi());
+  int32_t value;
+  CHECK(length->ToInt32(&value));
+  CHECK_EQ(3, value);
+}
+
+}  // namespace internal
+}  // namespace v8