Test body streams from readable-stream

Fixes #1503

package.json

@@ -66,6 +66,7 @@
 		"@types/node-fetch": "^2.5.8",
 		"@types/pem": "^1.9.5",
 		"@types/pify": "^5.0.0",
+		"@types/readable-stream": "^2.3.9",
 		"@types/request": "^2.48.5",
 		"@types/sinon": "^9.0.9",
 		"@types/tough-cookie": "^4.0.0",
@@ -86,6 +87,7 @@
 		"p-event": "^4.2.0",
 		"pem": "^1.14.4",
 		"pify": "^5.0.0",
+		"readable-stream": "^3.6.0",
 		"request": "^2.88.2",
 		"sinon": "^9.2.4",
 		"slow-stream": "0.0.4",

test/stream.ts

@@ -1,6 +1,7 @@
 import {promisify} from 'util';
 import * as fs from 'fs';
 import {PassThrough as PassThroughStream, Readable as ReadableStream} from 'stream';
+import {Readable as Readable2} from 'readable-stream';
 import * as stream from 'stream';
 import test from 'ava';
 import {Handler} from 'express';
@@ -452,6 +453,23 @@ test('does not accept unreadable stream as body', withServer, async (t, server,
 	// TODO: Add assert message above.
 });
 
+test('accepts readable-stream as body', withServer, async (t, server, got) => {
+	server.post('/', (request, response) => {
+		request.pipe(response);
+	});
+
+	const body = new Readable2({
+		read() {
+			this.push('ok');
+			this.push(null);
+		}
+	});
+
+	const response = await got.post({body});
+
+	t.is(response.body, 'ok');
+});
+
 if (Number.parseInt(process.versions.node.split('.')[0]!, 10) <= 12) {
 	test('does not emit end event on error', withServer, async (t, server, got) => {
 		server.get('/', infiniteHandler);