Test that console is a namespace

console/OWNERS

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+@domenic
+@pwnall

console/console-is-a-namespace.any.js

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+"use strict";
+// https://heycam.github.io/webidl/#es-namespaces
+// https://console.spec.whatwg.org/#console-namespace
+
+test(() => {
+  assert_true(self.hasOwnProperty("console"));
+}, "console exists on the global object");
+
+test(() => {
+  const propDesc = Object.getOwnPropertyDescriptor(self, "console");
+  assert_equals(propDesc.writable, true, "must be writable");
+  assert_equals(propDesc.enumerable, false, "must not be enumerable");
+  assert_equals(propDesc.configurable, true, "must be configurable");
+  assert_equals(propDesc.value, console, "must have the right value");
+}, "console has the right property descriptors");
+
+test(() => {
+  assert_false("Console" in self);
+}, "Console (uppercase, as if it were an interface) must not exist");
+
+test(() => {
+  const prototype1 = Object.getPrototypeOf(console);
+  const prototype2 = Object.getPrototypeOf(prototype1);
+
+  assert_equals(Object.getOwnPropertyNames(prototype1).length, 0, "The [[Prototype]] must have no properties");
+  assert_equals(prototype2, Object.prototype, "The [[Prototype]]'s [[Prototype]] must be %ObjectPrototype%");
+}, "The prototype chain must be correct");