Added new reading method to blob

src/blob.js

@@ -49,6 +49,21 @@ export default class Blob {
 	get type() {
 		return this[TYPE];
 	}
+	text() {
+		return Promise.resolve(this[BUFFER].toString())
+	}
+	arrayBuffer() {
+		const buf = this[BUFFER];
+		const ab = buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+		return Promise.resolve(ab);
+	}
+	// stream() {
+	//	 const readable = new Readable()
+	//	 readable._read = () => {}
+	//	 readable.push(this[BUFFER])
+	//	 readable.push(null)
+	//	 return readable || whatwg stream? not decided
+	// }
 	slice() {
 		const size = this.size;
 

test/test.js

@@ -1773,6 +1773,25 @@ describe('node-fetch', () => {
 		});
 	});
 
+	it('should support reading blob as text', function() {
+		return new Response(`hello`)
+			.blob()
+			.then(blob => blob.text())
+			.then(body => {
+				expect(body).to.equal('hello');
+			})
+	})
+
+	it('should support reading blob as arrayBuffer', function() {
+		return new Response(`hello`)
+			.blob()
+			.then(blob => blob.arrayBuffer())
+			.then(ab => {
+				const str = String.fromCharCode.apply(null, new Uint8Array(ab));
+				expect(str).to.equal('hello');
+			})
+	})
+
 	it('should support blob round-trip', function() {
 		const url = `${base}hello`;