url: check forEach callback is a function

The Web IDL spec mandates such a check.

Also make error messages consistent with rest of Node.js and add
additional tests for forEach().

PR-URL: nodejs#10905
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

lib/internal/url.js

@@ -672,8 +672,7 @@ class URLSearchParams {
       throw new TypeError('Value of `this` is not a URLSearchParams');
     }
     if (arguments.length < 2) {
-      throw new TypeError(
-        'Both `name` and `value` arguments need to be specified');
+      throw new TypeError('"name" and "value" arguments must be specified');
     }
 
     name = String(name);
@@ -687,7 +686,7 @@ class URLSearchParams {
       throw new TypeError('Value of `this` is not a URLSearchParams');
     }
     if (arguments.length < 1) {
-      throw new TypeError('The `name` argument needs to be specified');
+      throw new TypeError('"name" argument must be specified');
     }
 
     const list = this[searchParams];
@@ -708,8 +707,7 @@ class URLSearchParams {
       throw new TypeError('Value of `this` is not a URLSearchParams');
     }
     if (arguments.length < 2) {
-      throw new TypeError(
-        'Both `name` and `value` arguments need to be specified');
+      throw new TypeError('"name" and "value" arguments must be specified');
     }
 
     const list = this[searchParams];
@@ -749,7 +747,7 @@ class URLSearchParams {
       throw new TypeError('Value of `this` is not a URLSearchParams');
     }
     if (arguments.length < 1) {
-      throw new TypeError('The `name` argument needs to be specified');
+      throw new TypeError('"name" argument must be specified');
     }
 
     const list = this[searchParams];
@@ -767,7 +765,7 @@ class URLSearchParams {
       throw new TypeError('Value of `this` is not a URLSearchParams');
     }
     if (arguments.length < 1) {
-      throw new TypeError('The `name` argument needs to be specified');
+      throw new TypeError('"name" argument must be specified');
     }
 
     const list = this[searchParams];
@@ -786,7 +784,7 @@ class URLSearchParams {
       throw new TypeError('Value of `this` is not a URLSearchParams');
     }
     if (arguments.length < 1) {
-      throw new TypeError('The `name` argument needs to be specified');
+      throw new TypeError('"name" argument must be specified');
     }
 
     const list = this[searchParams];
@@ -814,8 +812,8 @@ class URLSearchParams {
     if (!this || !(this instanceof URLSearchParams)) {
       throw new TypeError('Value of `this` is not a URLSearchParams');
     }
-    if (arguments.length < 1) {
-      throw new TypeError('The `callback` argument needs to be specified');
+    if (typeof callback !== 'function') {
+      throw new TypeError('"callback" argument must be a function');
     }
 
     let list = this[searchParams];

test/parallel/test-whatwg-url-searchparams.js

@@ -44,6 +44,20 @@ n = 0;
 for (val of sp.values()) {
   assert.strictEqual(val, String(values[n++]));
 }
+n = 0;
+sp.forEach(function(val, key, obj) {
+  assert.strictEqual(this, undefined);
+  assert.strictEqual(key, 'a');
+  assert.strictEqual(val, String(values[n++]));
+  assert.strictEqual(obj, sp);
+});
+sp.forEach(function() {
+  assert.strictEqual(this, m);
+}, m);
+assert.throws(() => sp.forEach(),
+              /^TypeError: "callback" argument must be a function$/);
+assert.throws(() => sp.forEach(1),
+              /^TypeError: "callback" argument must be a function$/);
 
 m.search = '?a=a&b=b';
 assert.strictEqual(sp.toString(), 'a=a&b=b');