fix(std/node): fix readFile types, add encoding types (#6451)

1 files changed, 22 insertions, 8 deletions

diff --git a/std/node/_fs/promises/_fs_readFile_test.ts b/std/node/_fs/promises/_fs_readFile_test.ts
index c92907fec..f5be2318b 100644
--- a/std/node/_fs/promises/_fs_readFile_test.ts
+++ b/std/node/_fs/promises/_fs_readFile_test.ts
@@ -7,24 +7,38 @@ const testData = path.resolve(
 );
 
 Deno.test("readFileSuccess", async function () {
-  const data = await readFile(testData);
+  const data: Uint8Array = await readFile(testData);
 
   assert(data instanceof Uint8Array);
-  assertEquals(new TextDecoder().decode(data as Uint8Array), "hello world");
+  assertEquals(new TextDecoder().decode(data), "hello world");
 });
 
-Deno.test("readFileEncodeUtf8Success", async function () {
-  const data = await readFile(testData, { encoding: "utf8" });
+Deno.test("readFileBinarySuccess", async function () {
+  const data: Uint8Array = await readFile(testData, "binary");
+
+  assert(data instanceof Uint8Array);
+  assertEquals(new TextDecoder().decode(data), "hello world");
+});
+
+Deno.test("readFileBinaryObjectSuccess", async function () {
+  const data: Uint8Array = await readFile(testData, { encoding: "binary" });
+
+  assert(data instanceof Uint8Array);
+  assertEquals(new TextDecoder().decode(data), "hello world");
+});
+
+Deno.test("readFileStringObjectSuccess", async function () {
+  const data: string = await readFile(testData, { encoding: "utf8" });
 
   assertEquals(typeof data, "string");
-  assertEquals(data as string, "hello world");
+  assertEquals(data, "hello world");
 });
 
-Deno.test("readFileEncodingAsString", async function () {
-  const data = await readFile(testData, "utf8");
+Deno.test("readFileStringSuccess", async function () {
+  const data: string = await readFile(testData, "utf8");
 
   assertEquals(typeof data, "string");
-  assertEquals(data as string, "hello world");
+  assertEquals(data, "hello world");
 });
 
 Deno.test("readFileError", async function () {