fix: handle opaque origin in sameOrigin

lib/fetch/util.js

@@ -638,7 +638,9 @@ function tryUpgradeRequestToAPotentiallyTrustworthyURL (request) {
  */
 function sameOrigin (A, B) {
   // 1. If A and B are the same opaque origin, then return true.
-  // "opaque origin" is an internal value we cannot access, ignore.
+  if (A.origin === B.origin && A.origin === 'null') {
+    return true
+  }
 
   // 2. If A and B are both tuple origins and their schemes,
   //    hosts, and port are identical, then return true.

package.json

@@ -46,14 +46,14 @@
     "build:wasm": "node build/wasm.js --docker",
     "lint": "standard | snazzy",
     "lint:fix": "standard --fix | snazzy",
-    "test": "npm run test:tap && npm run test:node-fetch && npm run test:fetch && npm run test:cookies && npm run test:wpt && npm run test:websocket && npm run test:jest && tsd",
+    "test": "npm run test:tap && npm run test:node-fetch && npm run test:fetch && npm run test:cookies && npm run test:wpt && npm run test:websocket && npm run test:jest && npm run test:typescript",
     "test:cookies": "node scripts/verifyVersion 16 || tap test/cookie/*.js",
     "test:node-fetch": "node scripts/verifyVersion.js 16 || mocha test/node-fetch",
     "test:fetch": "node scripts/verifyVersion.js 16 || (npm run build:node && tap --expose-gc test/fetch/*.js && tap test/webidl/*.js)",
     "test:jest": "node scripts/verifyVersion.js 14 || jest",
     "test:tap": "tap test/*.js test/diagnostics-channel/*.js",
     "test:tdd": "tap test/*.js test/diagnostics-channel/*.js -w",
-    "test:typescript": "tsd && tsc test/imports/undici-import.ts",
+    "test:typescript": "node scripts/verifyVersion.js 14 || tsd",
     "test:websocket": "node scripts/verifyVersion.js 18 || tap test/websocket/*.js",
     "test:wpt": "node scripts/verifyVersion 18 || (node test/wpt/start-fetch.mjs && node test/wpt/start-FileAPI.mjs && node test/wpt/start-mimesniff.mjs && node test/wpt/start-xhr.mjs && node --no-warnings test/wpt/start-websockets.mjs)",
     "coverage": "nyc --reporter=text --reporter=html npm run test",

test/fetch/util.js

@@ -111,6 +111,16 @@ test('sameOrigin', (t) => {
     t.end()
   })
 
+  t.test('file:// urls', (t) => {
+    // urls with opaque origins should return true
+
+    const a = new URL('file:///C:/undici')
+    const b = new URL('file:///var/undici')
+
+    t.ok(util.sameOrigin(a, b))
+    t.end()
+  })
+
   t.end()
 })