From ef653c6d64d2af002e1f08dc15a52f111308b698 Mon Sep 17 00:00:00 2001
From: Artem Zakharchenko <kettanaito@gmail.com>
Date: Sun, 27 Feb 2022 02:05:52 +0100
Subject: [PATCH] fix(xhr): support original responses without any headers
 (#216)

---
 package.json                                  |  2 +-
 .../xhr-no-response-headers.test.ts           | 53 +++++++++++++++++++
 yarn.lock                                     | 11 ++--
 3 files changed, 62 insertions(+), 4 deletions(-)
 create mode 100644 test/modules/XMLHttpRequest/compliance/xhr-no-response-headers.test.ts

diff --git a/package.json b/package.json
index d72b1140..bba6582b 100644
--- a/package.json
+++ b/package.json
@@ -65,7 +65,7 @@
     "@open-draft/until": "^1.0.3",
     "@xmldom/xmldom": "^0.7.5",
     "debug": "^4.3.3",
-    "headers-polyfill": "^3.0.3",
+    "headers-polyfill": "^3.0.4",
     "outvariant": "^1.2.1",
     "strict-event-emitter": "^0.2.0"
   },
diff --git a/test/modules/XMLHttpRequest/compliance/xhr-no-response-headers.test.ts b/test/modules/XMLHttpRequest/compliance/xhr-no-response-headers.test.ts
new file mode 100644
index 00000000..5340bd1b
--- /dev/null
+++ b/test/modules/XMLHttpRequest/compliance/xhr-no-response-headers.test.ts
@@ -0,0 +1,53 @@
+/**
+ * @jest-environment jsdom
+ */
+import { ServerApi, createServer } from '@open-draft/test-server'
+import { createInterceptor } from '../../../../src'
+import { interceptXMLHttpRequest } from '../../../../src/interceptors/XMLHttpRequest'
+import { createXMLHttpRequest } from '../../../helpers'
+
+let httpServer: ServerApi
+
+const interceptor = createInterceptor({
+  modules: [interceptXMLHttpRequest],
+  resolver() {},
+})
+
+beforeAll(async () => {
+  httpServer = await createServer((app) => {
+    app.get('/user', (_req, res) => {
+      // Respond with a message that has no headers.
+      res.socket?.end(`\
+HTTP/1.1 200 OK
+
+hello world`)
+    })
+  })
+
+  interceptor.apply()
+
+  /**
+   * @note Stub the internal JSDOM property to prevent the following error:
+   * Error: Cross origin http://127.0.0.1:XXXXX/ forbidden
+   */
+  const { protocol, host, port } = httpServer.http.getAddress()
+  // @ts-expect-error
+  window._origin = `${protocol}//${host}:${port}`
+})
+
+afterAll(async () => {
+  interceptor.restore()
+  await httpServer.close()
+})
+
+test('handles an original response without any headers', async () => {
+  const req = await createXMLHttpRequest((req) => {
+    req.open('GET', httpServer.http.makeUrl('/user'))
+    req.send()
+  })
+
+  expect(req.status).toEqual(200)
+  expect(req.statusText).toEqual('OK')
+  expect(req.responseText).toEqual('hello world')
+  expect(req.getAllResponseHeaders()).toEqual('')
+})
diff --git a/yarn.lock b/yarn.lock
index 3e03cf9e..33be98c9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2544,9 +2544,9 @@ findup-sync@^4.0.0:
     resolve-dir "^1.0.1"
 
 follow-redirects@^1.14.4:
-  version "1.14.8"
-  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.8.tgz#016996fb9a11a100566398b1c6839337d7bfa8fc"
-  integrity sha512-1x0S9UVJHsQprFcEC/qnNzBLcIxsjAV905f/UkQxbclCsoTWlacCNOpQa/anodLl2uaEKFhfWOvM2Qg77+15zA==
+  version "1.14.9"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.9.tgz#dd4ea157de7bfaf9ea9b3fbd85aa16951f78d8d7"
+  integrity sha512-MQDfihBQYMcyy5dhRDJUHcw7lb2Pv/TuE6xP1vyraLukNDHKbDxDNaOE3NbCAdKQApno+GPRyo1YAp89yCjK4w==
 
 form-data@^3.0.0:
   version "3.0.1"
@@ -2777,6 +2777,11 @@ headers-polyfill@^3.0.3:
   resolved "https://registry.yarnpkg.com/headers-polyfill/-/headers-polyfill-3.0.3.tgz#222bd9a6b5a1f610ad563473efb0d34a13eb7ebc"
   integrity sha512-Ak5m549Y+5vBtWNnIUcyARJjF0tQpINuy3+vOqG8tK/qjF0itYhAPgrzJc0zsZJh7AX8PalzICMPuWIqHpZlEA==
 
+headers-polyfill@^3.0.4:
+  version "3.0.4"
+  resolved "https://registry.yarnpkg.com/headers-polyfill/-/headers-polyfill-3.0.4.tgz#cd70c815a441dd882372fcd6eda212ce997c9b18"
+  integrity sha512-I1DOM1EdWYntdrnCvqQtcKwSSuiTzoqOExy4v1mdcFixFZABlWP4IPHdmoLtPda0abMHqDOY4H9svhQ10DFR4w==
+
 homedir-polyfill@^1.0.1:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/homedir-polyfill/-/homedir-polyfill-1.0.3.tgz#743298cef4e5af3e194161fbadcc2151d3a058e8"