Add test to ensure that HTTP request errors are catched (#384)

package.json

@@ -76,6 +76,7 @@
 		"get-port": "^3.0.0",
 		"nyc": "^11.0.2",
 		"pem": "^1.4.4",
+		"sinon": "^4.0.0",
 		"slow-stream": "0.0.4",
 		"tempfile": "^2.0.0",
 		"tempy": "^0.1.0",

test/error.js

@@ -1,4 +1,6 @@
+import http from 'http';
 import test from 'ava';
+import sinon from 'sinon';
 import got from '..';
 import {createServer} from './helpers/server';
 
@@ -43,6 +45,16 @@ test('options.body error message', async t => {
 	t.regex(err.message, /options\.body must be a ReadableStream, string, Buffer or plain Object/);
 });
 
+test.serial('http.request error', async t => {
+	const stub = sinon.stub(http, 'request').callsFake(() => {
+		throw new TypeError('The header content contains invalid characters');
+	});
+	const err = await t.throws(got(s.url));
+	t.truthy(err instanceof TypeError);
+	t.regex(err.message, /The header content contains invalid characters/);
+	stub.restore();
+});
+
 test.after('cleanup', async () => {
 	await s.close();
 });