From 4aeeaf29b0a96641a0b60ee431e6397fdf8251b6 Mon Sep 17 00:00:00 2001
From: Mate Dabis <mdabis@inf.u-szeged.hu>
Date: Mon, 21 Jan 2019 13:39:05 +0100
Subject: [PATCH] Increase branch coverage: Array.prototype.join

Branch coverage:
Before: 19/20
After: 20/20

JerryScript-DCO-1.0-Signed-off-by: Mate Dabis mdabis@inf.u-szeged.hu
---
 tests/jerry/array-prototype-join.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/jerry/array-prototype-join.js b/tests/jerry/array-prototype-join.js
index 96233d0e72..1257572873 100644
--- a/tests/jerry/array-prototype-join.js
+++ b/tests/jerry/array-prototype-join.js
@@ -74,3 +74,12 @@ obj_2[3] = 4;
 obj_2.join = Array.prototype.join;
 
 assert (obj_2.join() === "1,2,3");
+
+/* ES v5.1 15.4.4.5.1.
+   Checking behavior when the function's this_argument is undefined */
+try {
+  Array.prototype.join.call(undefined);
+  assert(false);
+} catch (e) {
+  assert(e instanceof TypeError);
+}