Add tests for isFile with Node.js' native File and Blob

Author: octet-stream

.eslintrc.json

@@ -1,6 +1,9 @@
 {
   "root": true,
   "parser": "@typescript-eslint/parser",
+  "globals": {
+    "globalThis": true
+  },
   "parserOptions": {
     "project": "./tsconfig.eslint.json"
   },

ava.config.js

@@ -7,6 +7,7 @@ export default {
   },
   nodeArguments: [
     "--no-warnings",
+    "--experimental-fetch",
     "--loader=ts-node/esm/transpile-only"
   ],
   files: [

src/FormDataEncoder.ts

@@ -271,6 +271,7 @@ export class FormDataEncoder {
    *
    * @example
    *
+   * ```ts
    * import {Readable} from "stream"
    *
    * import {FormDataEncoder} from "form-data-encoder"
@@ -298,6 +299,7 @@ export class FormDataEncoder {
    * const response = await fetch("https://httpbin.org/post", options)
    *
    * console.log(await response.json())
+   * ```
    */
   * values(): Generator<Uint8Array | FileLike, void, undefined> {
     for (const [name, raw] of this.#form) {
@@ -321,6 +323,7 @@ export class FormDataEncoder {
    *
    * @example
    *
+   * ```ts
    * import {Readable} from "stream"
    *
    * import {FormData, File, fileFromPath} from "formdata-node"
@@ -345,6 +348,7 @@ export class FormDataEncoder {
    * const response = await fetch("https://httpbin.org/post", options)
    *
    * console.log(await response.json())
+   * ```
    */
   async* encode(): AsyncGenerator<Uint8Array, void, undefined> {
     for (const part of this.values()) {

src/util/isFile.test.ts

@@ -1,3 +1,5 @@
+import {File as NativeFile, Blob as NativeBlob} from "node:buffer"
+
 import test from "ava"
 
 import {File, Blob} from "formdata-node"
@@ -11,6 +13,12 @@ test("Returns true for a File", t => {
   t.true(isFile(file))
 })
 
+test("Returns true for native File", t => {
+  const file = new NativeFile(["Content"], "name.txt")
+
+  t.true(isFile(file))
+})
+
 test("Returns true for a class that implements File", t => {
   class MyFile implements FileLike {
     name = ""
@@ -72,3 +80,9 @@ test("Returns false for Blob", t => {
 
   t.false(isFile(blob))
 })
+
+test("Returns false for native Blob", t => {
+  const blob = new NativeBlob(["Content"], {type: "text/plain"})
+
+  t.false(isFile(blob))
+})

src/util/isFile.ts

@@ -12,20 +12,21 @@ import {isFunction} from "./isFunction.js"
  *
  * This function will return `true` for FileAPI compatible `File` objects:
  *
- * ```
+ * ```ts
  * import {createReadStream} from "node:fs"
  *
  * import {isFile} from "form-data-encoder"
  *
  * isFile(new File(["Content"], "file.txt")) // -> true
  * ```
  *
- * However, if you pass a Node.js `Buffer` or `ReadStream`, it will return `false`:
+ * However, if you pass a Node.js `Buffer`, or `Blob`, or `ReadStream`, it will return `false`:
  *
  * ```js
  * import {isFile} from "form-data-encoder"
  *
  * isFile(Buffer.from("Content")) // -> false
+ * isFile(new Blob(["Content"])) // -> false
  * isFile(createReadStream("path/to/a/file.txt")) // -> false
  * ```
  */