querystring: convert to using internal/errors

PR-URL: https://github.com/nodejs/node/pull/15565
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

doc/api/errors.md

@@ -1116,6 +1116,11 @@ API] [`URLSearchParams` constructor][`new URLSearchParams(iterable)`] does not
 represent a `[name, value]` tuple – that is, if an element is not iterable, or
 does not consist of exactly two elements.
 
+<a id="ERR_INVALID_URI"></a>
+### ERR_INVALID_URI
+
+Used when an invalid URI is passed.
+
 <a id="ERR_INVALID_URL"></a>
 ### ERR_INVALID_URL
 

lib/internal/errors.js

@@ -126,6 +126,7 @@ module.exports = exports = {
   Error: makeNodeError(Error),
   TypeError: makeNodeError(TypeError),
   RangeError: makeNodeError(RangeError),
+  URIError: makeNodeError(URIError),
   AssertionError,
   E // This is exported only to facilitate testing.
 };
@@ -287,6 +288,7 @@ E('ERR_INVALID_SYNC_FORK_INPUT',
   'Asynchronous forks do not support Buffer, Uint8Array or string input: %s');
 E('ERR_INVALID_THIS', 'Value of "this" must be of type %s');
 E('ERR_INVALID_TUPLE', '%s must be an iterable %s tuple');
+E('ERR_INVALID_URI', 'URI malformed');
 E('ERR_INVALID_URL', 'Invalid URL: %s');
 E('ERR_INVALID_URL_SCHEME',
   (expected) => `The URL must be ${oneOf(expected, 'scheme')}`);

lib/querystring.js

@@ -24,6 +24,7 @@
 'use strict';
 
 const { Buffer } = require('buffer');
+const errors = require('internal/errors');
 const {
   hexTable,
   isHexTable
@@ -174,11 +175,12 @@ function qsEscape(str) {
     }
     // Surrogate pair
     ++i;
-    var c2;
+
-    if (i < str.length)
+    if (i >= str.length)
-      c2 = str.charCodeAt(i) & 0x3FF;
+      throw new errors.URIError('ERR_INVALID_URI');
-    else
+
-      throw new URIError('URI malformed');
+    var c2 = str.charCodeAt(i) & 0x3FF;
+
     lastPos = i + 1;
     c = 0x10000 + (((c & 0x3FF) << 10) | c2);
     out += hexTable[0xF0 | (c >> 18)] +

test/parallel/test-querystring-escape.js

@@ -1,5 +1,5 @@
 'use strict';
-require('../common');
+const common = require('../common');
 const assert = require('assert');
 
 const qs = require('querystring');
@@ -12,8 +12,15 @@ assert.deepStrictEqual(qs.escape('Ŋōđĕ'), '%C5%8A%C5%8D%C4%91%C4%95');
 assert.deepStrictEqual(qs.escape('testŊōđĕ'), 'test%C5%8A%C5%8D%C4%91%C4%95');
 assert.deepStrictEqual(qs.escape(`${String.fromCharCode(0xD800 + 1)}test`),
                        '%F0%90%91%B4est');
-assert.throws(() => qs.escape(String.fromCharCode(0xD800 + 1)),
+
-              /^URIError: URI malformed$/);
+common.expectsError(
+  () => qs.escape(String.fromCharCode(0xD800 + 1)),
+  {
+    code: 'ERR_INVALID_URI',
+    type: URIError,
+    message: 'URI malformed'
+  }
+);
 
 // using toString for objects
 assert.strictEqual(

test/parallel/test-querystring.js

@@ -20,7 +20,7 @@
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 'use strict';
-require('../common');
+const common = require('../common');
 const assert = require('assert');
 const inspect = require('util').inspect;
 
@@ -271,9 +271,14 @@ qsWeirdObjects.forEach(function(testCase) {
 });
 
 // invalid surrogate pair throws URIError
-assert.throws(function() {
+common.expectsError(
-  qs.stringify({ foo: '\udc00' });
+  () => qs.stringify({ foo: '\udc00' }),
-}, /^URIError: URI malformed$/);
+  {
+    code: 'ERR_INVALID_URI',
+    type: URIError,
+    message: 'URI malformed'
+  }
+);
 
 // coerce numbers to string
 assert.strictEqual('foo=0', qs.stringify({ foo: 0 }));