test blob

blob.js

@@ -1,15 +1,14 @@
 // Based on https://github.com/tmpvar/jsdom/blob/aa85b2abf07766ff7bf5c1f6daafb3726f2f2db5/lib/jsdom/living/blob.js
+// Also based on https://github.com/bitinn/node-fetch/blob/v2.5.0/src/blob.js
 // (MIT licensed)
 
-import Stream from 'stream';
-
-// fix for "Readable" isn't a named export issue
+const Stream = require('stream');
 const Readable = Stream.Readable;
 
-export const BUFFER = Symbol('buffer');
+const BUFFER = Symbol('buffer');
 const TYPE = Symbol('type');
 
-export default class Blob {
+class Blob {
 	constructor() {
 		this[TYPE] = '';
 
@@ -43,7 +42,9 @@ export default class Blob {
 
 		this[BUFFER] = Buffer.concat(buffers);
 
-		let type = options && options.type !== undefined && String(options.type).toLowerCase();
+		let type = options &&
+			options.type !== undefined &&
+			String(options.type).toLowerCase();
 		if (type && !/[^\u0020-\u007E]/.test(type)) {
 			this[TYPE] = type;
 		}
@@ -63,11 +64,11 @@ export default class Blob {
 		return Promise.resolve(ab);
 	}
 	stream() {
-		 const readable = new Readable();
-		 readable._read = () => {};
-		 readable.push(this[BUFFER]);
-		 readable.push(null);
-		 return readable;
+		const readable = new Readable();
+		readable._read = () => {};
+		readable.push(this[BUFFER]);
+		readable.push(null);
+		return readable;
 	}
 	toString() {
 		return '[object Blob]'
@@ -117,3 +118,5 @@ Object.defineProperty(Blob.prototype, Symbol.toStringTag, {
 	enumerable: false,
 	configurable: true
 });
+
+module.exports = Blob;

package.json

@@ -4,7 +4,7 @@
   "description": "A Blob implementation on node.js, originally from node-fetch",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "ava"
   },
   "repository": {
     "type": "git",
@@ -19,5 +19,10 @@
   "bugs": {
     "url": "https://github.com/bitinn/fetch-blob/issues"
   },
-  "homepage": "https://github.com/bitinn/fetch-blob#readme"
+  "homepage": "https://github.com/bitinn/fetch-blob#readme",
+  "devDependencies": {
+    "ava": "^1.4.1",
+    "get-stream": "^5.1.0",
+    "node-fetch": "^2.6.0"
+  }
 }

test.js

@@ -0,0 +1,78 @@
+
+import test from 'ava';
+import Blob from './blob';
+import util from 'util';
+import stream from 'stream';
+import getStream from 'get-stream';
+import { Response } from 'node-fetch';
+
+const TextDecoder = util.TextDecoder;
+const Readable = stream.Readable;
+
+test('Blob ctor', t => {
+	let data = 'a=1';
+	let blob = new Blob([data]);
+	t.pass();
+});
+
+test('Blob size', t => {
+	let data = 'a=1';
+	let blob = new Blob([data]);
+	t.is(blob.size, data.length);
+});
+
+test('Blob type', t => {
+	let data = 'a=1';
+	let type = 'text/plain';
+	let blob = new Blob([data], { type });
+	t.is(blob.type, type);
+});
+
+test('Blob text()', async t => {
+	let data = 'a=1';
+	let type = 'text/plain';
+	let blob = new Blob([data], { type });
+	t.is(await blob.text(), data);
+});
+
+test('Blob arrayBuffer()', async t => {
+	let data = 'a=1';
+	let type = 'text/plain';
+	let blob = new Blob([data], { type });
+
+	let decoder = new TextDecoder('utf-8');
+	let buffer = await blob.arrayBuffer();
+	t.is(decoder.decode(buffer), data);
+});
+
+test('Blob stream()', async t => {
+	let data = 'a=1';
+	let type = 'text/plain';
+	let blob = new Blob([data], { type });
+	let result = await getStream(blob.stream());
+	t.is(result, data);
+});
+
+test('Blob toString()', t => {
+	let data = 'a=1';
+	let type = 'text/plain';
+	let blob = new Blob([data], { type });
+	t.is(blob.toString(), '[object Blob]');
+});
+
+test('Blob slice()', async t => {
+	let data = 'a=1';
+	let type = 'text/plain';
+	let blob = new Blob([data], { type });
+	let blob2 = blob.slice(0, 1);
+	t.is(await blob2.text(), data.slice(0, 1));
+});
+
+test('Blob works with node-fetch Response', async t => {
+	let data = 'a=1';
+	let type = 'text/plain';
+	let blob = new Blob([data], { type });
+	let res = new Response(blob);
+	let blob2 = await res.blob();
+	t.is(await blob2.text(), data);
+});