1 files changed, 123 insertions, 0 deletions
diff --git a/tests/unit_node/_fs/_fs_readFile_test.ts b/tests/unit_node/_fs/_fs_readFile_test.ts
new file mode 100644
index 000000000..00653955d
--- /dev/null
+++ b/tests/unit_node/_fs/_fs_readFile_test.ts
@@ -0,0 +1,123 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import { assertCallbackErrorUncaught } from "../_test_utils.ts";
+import { promises, readFile, readFileSync } from "node:fs";
+import * as path from "@test_util/std/path/mod.ts";
+import { assert, assertEquals } from "@test_util/std/assert/mod.ts";
+
+const moduleDir = path.dirname(path.fromFileUrl(import.meta.url));
+const testData = path.resolve(moduleDir, "testdata", "hello.txt");
+
+Deno.test("readFileSuccess", async function () {
+  const data = await new Promise((res, rej) => {
+    readFile(testData, (err, data) => {
+      if (err) {
+        rej(err);
+      }
+      res(data);
+    });
+  });
+
+  assert(data instanceof Uint8Array);
+  assertEquals(new TextDecoder().decode(data as Uint8Array), "hello world");
+});
+
+Deno.test("readFileEncodeUtf8Success", async function () {
+  const data = await new Promise((res, rej) => {
+    readFile(testData, { encoding: "utf8" }, (err, data) => {
+      if (err) {
+        rej(err);
+      }
+      res(data);
+    });
+  });
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "hello world");
+});
+
+Deno.test("readFileEncodeHexSuccess", async function () {
+  const data = await new Promise((res, rej) => {
+    readFile(testData, { encoding: "hex" }, (err, data) => {
+      if (err) {
+        rej(err);
+      }
+      res(data);
+    });
+  });
+
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "68656c6c6f20776f726c64");
+});
+
+Deno.test("readFileEncodeBase64Success", async function () {
+  const data = await new Promise((res, rej) => {
+    readFile(testData, { encoding: "base64" }, (err, data) => {
+      if (err) {
+        rej(err);
+      }
+      res(data);
+    });
+  });
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "aGVsbG8gd29ybGQ=");
+});
+
+Deno.test("readFileEncodingAsString", async function () {
+  const data = await new Promise((res, rej) => {
+    readFile(testData, "utf8", (err, data) => {
+      if (err) {
+        rej(err);
+      }
+      res(data);
+    });
+  });
+
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "hello world");
+});
+
+Deno.test("readFileSyncSuccess", function () {
+  const data = readFileSync(testData);
+  assert(data instanceof Uint8Array);
+  assertEquals(new TextDecoder().decode(data as Uint8Array), "hello world");
+});
+
+Deno.test("readFileEncodeUtf8Success", function () {
+  const data = readFileSync(testData, { encoding: "utf8" });
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "hello world");
+});
+
+Deno.test("readFileEncodeHexSuccess", function () {
+  const data = readFileSync(testData, { encoding: "hex" });
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "68656c6c6f20776f726c64");
+});
+
+Deno.test("readFileEncodeBase64Success", function () {
+  const data = readFileSync(testData, { encoding: "base64" });
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "aGVsbG8gd29ybGQ=");
+});
+
+Deno.test("readFileEncodeAsString", function () {
+  const data = readFileSync(testData, "utf8");
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "hello world");
+});
+
+Deno.test("[std/node/fs] readFile callback isn't called twice if error is thrown", async () => {
+  const tempFile = await Deno.makeTempFile();
+  const importUrl = new URL("node:fs", import.meta.url);
+  await assertCallbackErrorUncaught({
+    prelude: `import { readFile } from ${JSON.stringify(importUrl)}`,
+    invocation: `readFile(${JSON.stringify(tempFile)}, `,
+    async cleanup() {
+      await Deno.remove(tempFile);
+    },
+  });
+});
+
+Deno.test("fs.promises.readFile with no arg call rejects with error correctly", async () => {
+  // @ts-ignore no arg call needs to be supported
+  await promises.readFile().catch((_e) => {});
+});