From f4f4c6bcb435ffb7e1dd9383d8d39e9e36b1337a Mon Sep 17 00:00:00 2001
From: Nayeem Rahman <muhammed.9939@gmail.com>
Date: Sat, 21 Dec 2019 08:58:28 +0000
Subject: [PATCH] fix: Use sync ops when clearing the console (#3533)

---
 cli/js/console.ts      |  4 ++--
 cli/js/console_test.ts | 10 +++++-----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/cli/js/console.ts b/cli/js/console.ts
index adebd729f1..216741a5e0 100644
--- a/cli/js/console.ts
+++ b/cli/js/console.ts
@@ -40,12 +40,12 @@ export class CSI {
 
 function cursorTo(stream: File, _x: number, _y?: number): void {
   const uint8 = new TextEncoder().encode(CSI.kClear);
-  stream.write(uint8);
+  stream.writeSync(uint8);
 }
 
 function clearScreenDown(stream: File): void {
   const uint8 = new TextEncoder().encode(CSI.kClearScreenDown);
-  stream.write(uint8);
+  stream.writeSync(uint8);
 }
 
 function getClassInstanceName(instance: unknown): string {
diff --git a/cli/js/console_test.ts b/cli/js/console_test.ts
index e7c5971cdf..4edc4aec66 100644
--- a/cli/js/console_test.ts
+++ b/cli/js/console_test.ts
@@ -8,7 +8,7 @@ const {
   customInspect,
   stringifyArgs,
   inspect,
-  write,
+  writeSync,
   stdout
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
 } = Deno as any;
@@ -331,20 +331,20 @@ test(function consoleTestError(): void {
 });
 
 test(function consoleTestClear(): void {
-  const stdoutWrite = stdout.write;
+  const stdoutWriteSync = stdout.writeSync;
   const uint8 = new TextEncoder().encode("\x1b[1;1H" + "\x1b[0J");
   let buffer = new Uint8Array(0);
 
-  stdout.write = async (u8: Uint8Array): Promise<number> => {
+  stdout.writeSync = (u8: Uint8Array): Promise<number> => {
     const tmp = new Uint8Array(buffer.length + u8.length);
     tmp.set(buffer, 0);
     tmp.set(u8, buffer.length);
     buffer = tmp;
 
-    return await write(stdout.rid, u8);
+    return writeSync(stdout.rid, u8);
   };
   console.clear();
-  stdout.write = stdoutWrite;
+  stdout.writeSync = stdoutWriteSync;
   assertEquals(buffer, uint8);
 });