From 9665d7d21636b0eb344bc83c104f1796e96809bf Mon Sep 17 00:00:00 2001
From: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>
Date: Mon, 5 Dec 2022 11:19:45 -0800
Subject: Add some more text decoder tests

---
 test/bun.js/text-decoder.test.js | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'test/bun.js/text-decoder.test.js')

diff --git a/test/bun.js/text-decoder.test.js b/test/bun.js/text-decoder.test.js
index bc10bf649..c2a00222f 100644
--- a/test/bun.js/text-decoder.test.js
+++ b/test/bun.js/text-decoder.test.js
@@ -101,3 +101,36 @@ describe("TextDecoder", () => {
     gcTrace(true);
   });
 });
+
+it("truncated sequences", () => {
+  const assert_equals = (a, b) => expect(a).toBe(b);
+
+  // Truncated sequences
+  assert_equals(new TextDecoder().decode(new Uint8Array([0xf0])), "\uFFFD");
+  assert_equals(
+    new TextDecoder().decode(new Uint8Array([0xf0, 0x9f])),
+    "\uFFFD",
+  );
+  assert_equals(
+    new TextDecoder().decode(new Uint8Array([0xf0, 0x9f, 0x92])),
+    "\uFFFD",
+  );
+
+  // Errors near end-of-queue
+  assert_equals(
+    new TextDecoder().decode(new Uint8Array([0xf0, 0x9f, 0x41])),
+    "\uFFFDA",
+  );
+  assert_equals(
+    new TextDecoder().decode(new Uint8Array([0xf0, 0x41, 0x42])),
+    "\uFFFDAB",
+  );
+  assert_equals(
+    new TextDecoder().decode(new Uint8Array([0xf0, 0x41, 0xf0])),
+    "\uFFFDA\uFFFD",
+  );
+  assert_equals(
+    new TextDecoder().decode(new Uint8Array([0xf0, 0x8f, 0x92])),
+    "\uFFFD\uFFFD\uFFFD",
+  );
+});
-- 
cgit v1.2.3