reorder copyN arguments to match Deno.copy (#4900)

4 files changed, 5 insertions, 5 deletions

diff --git a/std/io/ioutil.ts b/std/io/ioutil.ts
index cfcfdf794..9a727f436 100644
--- a/std/io/ioutil.ts
+++ b/std/io/ioutil.ts
@@ -8,8 +8,8 @@ import { assert } from "../testing/asserts.ts";
  *  If read size is lesser than N, then returns nread
  * */
 export async function copyN(
-  dest: Writer,
   r: Reader,
+  dest: Writer,
   size: number
 ): Promise<number> {
   let bytesRead = 0;
diff --git a/std/io/ioutil_test.ts b/std/io/ioutil_test.ts
index d00986da5..bb01811ad 100644
--- a/std/io/ioutil_test.ts
+++ b/std/io/ioutil_test.ts
@@ -73,7 +73,7 @@ Deno.test(function testSliceLongToBytes2(): void {
 Deno.test(async function testCopyN1(): Promise<void> {
   const w = new Buffer();
   const r = stringsReader("abcdefghij");
-  const n = await copyN(w, r, 3);
+  const n = await copyN(r, w, 3);
   assertEquals(n, 3);
   assertEquals(w.toString(), "abc");
 });
@@ -81,7 +81,7 @@ Deno.test(async function testCopyN1(): Promise<void> {
 Deno.test(async function testCopyN2(): Promise<void> {
   const w = new Buffer();
   const r = stringsReader("abcdefghij");
-  const n = await copyN(w, r, 11);
+  const n = await copyN(r, w, 11);
   assertEquals(n, 10);
   assertEquals(w.toString(), "abcdefghij");
 });
diff --git a/std/io/readers_test.ts b/std/io/readers_test.ts
index 041fd78a8..05b63b892 100644
--- a/std/io/readers_test.ts
+++ b/std/io/readers_test.ts
@@ -30,7 +30,7 @@ test(async function ioStringReader(): Promise<void> {
 test(async function ioMultiReader(): Promise<void> {
   const r = new MultiReader(new StringReader("abc"), new StringReader("def"));
   const w = new StringWriter();
-  const n = await copyN(w, r, 4);
+  const n = await copyN(r, w, 4);
   assertEquals(n, 4);
   assertEquals(w.toString(), "abcd");
   await copy(r, w);
diff --git a/std/io/writers_test.ts b/std/io/writers_test.ts
index 96dc044ae..24f2f3b3f 100644
--- a/std/io/writers_test.ts
+++ b/std/io/writers_test.ts
@@ -7,7 +7,7 @@ import { copyN } from "./ioutil.ts";
 test(async function ioStringWriter(): Promise<void> {
   const w = new StringWriter("base");
   const r = new StringReader("0123456789");
-  await copyN(w, r, 4);
+  await copyN(r, w, 4);
   assertEquals(w.toString(), "base0123");
   await copy(r, w);
   assertEquals(w.toString(), "base0123456789");