From d0cd7a39a2d05343c5501dc286bb59096659654f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=BF=B7=E6=B8=A1?= <justjavac@gmail.com>
Date: Fri, 19 Apr 2019 09:56:33 +0800
Subject: avoid prototype builtin hasOwnProperty (#2144)

---
 js/blob_test.ts | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'js/blob_test.ts')

diff --git a/js/blob_test.ts b/js/blob_test.ts
index 1e8ec8fbd..3c778a0e1 100644
--- a/js/blob_test.ts
+++ b/js/blob_test.ts
@@ -32,4 +32,22 @@ test(function blobSlice() {
   assertEquals(b4.size, blob.size);
 });
 
+test(function blobShouldNotThrowError() {
+  let hasThrown = false;
+
+  try {
+    const options1: object = {
+      ending: "utf8",
+      hasOwnProperty: "hasOwnProperty"
+    };
+    const options2: object = Object.create(null);
+    new Blob(["Hello World"], options1);
+    new Blob(["Hello World"], options2);
+  } catch {
+    hasThrown = true;
+  }
+
+  assertEquals(hasThrown, false);
+});
+
 // TODO(qti3e) Test the stored data in a Blob after implementing FileReader API.
-- 
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