From 9b4da88a96ce4c793e7b15d9b340fa6326a29a82 Mon Sep 17 00:00:00 2001
From: uki00a <uki00a@gmail.com>
Date: Wed, 20 May 2020 23:34:20 +0900
Subject: fix(std/io): BufReader should not share the internal buffer across
 reads (#4543)

---
 std/textproto/test.ts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'std/textproto')

diff --git a/std/textproto/test.ts b/std/textproto/test.ts
index 3b71bc08c..ec66bfd8c 100644
--- a/std/textproto/test.ts
+++ b/std/textproto/test.ts
@@ -180,3 +180,16 @@ test({
     assertEquals(m.get("Content-Disposition"), 'form-data; name="test"');
   },
 });
+
+test({
+  name: "[textproto] #4521 issue",
+  async fn() {
+    const input = "abcdefghijklmnopqrstuvwxyz";
+    const bufSize = 25;
+    const tp = new TextProtoReader(
+      new BufReader(stringsReader(input), bufSize)
+    );
+    const line = await tp.readLine();
+    assertEquals(line, input);
+  },
+});
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