Add a few tweaks

test/built-ins/Realm/extensibility.js

@@ -0,0 +1,15 @@
+// Copyright (C) 2021 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-realm-constructor
+description: >
+  The Realm constructor is extensible
+info: |
+  17 ECMAScript Standard Built-in Objects
+
+  Unless specified otherwise, the [[Extensible]] internal slot of a built-in
+  object initially has the value true.
+features: [callable-boundary-realms]
+---*/
+
+assert.sameValue(Object.isExtensible(Realm), true);

test/built-ins/Realm/instance-extensibility.js

@@ -0,0 +1,43 @@
+// Copyright (C) 2021 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-realm
+description: >
+  The new instance is extensible
+info: |
+  Realm ( )
+
+  ...
+  2. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%Realm.prototype%",
+  « [[Realm]], [[ExecutionContext]] »).
+  ...
+  13. Return O.
+
+  OrdinaryCreateFromConstructor creates a new ordinary objects including the
+  internal slots [[Prototype]] and [[Extensible]]. The latter will have its
+  value set to true.
+includes: [propertyHelper.js]
+features: [callable-boundary-realms]
+---*/
+
+const realm = new Realm();
+
+assert(Object.isExtensible(realm));
+
+Object.defineProperty(realm, 'foo', {});
+assert(realm.hasOwnProperty('foo'), 'confirms extensibility adding a new property');
+
+Object.defineProperty(realm, 'foo', {
+  value: 'bar',
+  writable: true,
+  configurable: true,
+  enumerable: false,
+});
+
+verifyProperty(realm, 'foo', {
+  value: 'bar',
+  writable: true,
+  configurable: true,
+  enumerable: false,
+});

test/built-ins/Realm/instance.js

@@ -4,6 +4,14 @@
 esid: sec-realm-constructor
 description: >
   new Realm() returns a realm instance
+info: |
+  Realm ( )
+
+  ...
+  2. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%Realm.prototype%",
+  « [[Realm]], [[ExecutionContext]] »).
+  ...
+  13. Return O.
 features: [callable-boundary-realms]
 ---*/
 assert.sameValue(
@@ -12,4 +20,11 @@ assert.sameValue(
   'This test must fail if Realm is not a function'
 );
 
-assert(new Realm() instanceof Realm);
+var realm = new Realm();
+
+assert(realm instanceof Realm);
+assert.sameValue(
+  Object.getPrototypeOf(realm),
+  Realm.prototype,
+  '[[Prototype]] is set to %Realm.prototype%'
+);

test/built-ins/Realm/prototype/evaluate/not-constructor.js

@@ -24,3 +24,11 @@ assert.throws(TypeError, () => {
   new Realm.prototype.evaluate("");
 }, '`new Realm.prototype.evaluate("")` throws TypeError');
 
+const r = new Realm(); 
+r.evaluate('globalThis.x = 0');
+
+assert.throws(TypeError, () => {
+  new r.evaluate("globalThis.x += 1;");
+}, '`new r.evaluate("...")` throws TypeError');
+
+assert.sameValue(r.evaluate('globalThis.x'), 0, 'No code evaluated in the new expression');

test/built-ins/Realm/prototype/evaluate/returns-primitive-values.js

@@ -22,6 +22,7 @@ assert.sameValue(r.evaluate('undefined'), undefined);
 assert.sameValue(r.evaluate('true'), true);
 assert.sameValue(r.evaluate('false'), false);
 assert.sameValue(r.evaluate('function fn() {}'), undefined, 'fn declaration has empty completion');
-  assert.sameValue(r.evaluate('-0'), -0);
+assert.sameValue(r.evaluate('{}'), undefined, 'Block has empty completion');
+assert.sameValue(r.evaluate('-0'), -0);
 assert.sameValue(r.evaluate('"str"'), 'str');
 assert(Number.isNaN(r.evaluate('NaN')));

test/built-ins/Realm/prototype/evaluate/throws-when-argument-is-not-a-string.js

@@ -22,3 +22,4 @@ assert.throws(TypeError, () => r.evaluate(null));
 assert.throws(TypeError, () => r.evaluate(undefined));
 assert.throws(TypeError, () => r.evaluate(true));
 assert.throws(TypeError, () => r.evaluate(false));
+assert.throws(TypeError, () => r.evaluate(new String('nope')));

test/built-ins/Realm/prototype/evaluate/validates-realm-object.js

@@ -17,5 +17,5 @@ const r = new Realm();
 const bogus = {};
 
 assert.throws(TypeError, function() {
-  r.evaluate.call(bogus);
+  r.evaluate.call(bogus, '');
 }, 'throws a TypeError if this is not a Realm object');

test/built-ins/Realm/prototype/evaluate/wrapped-functions-new-wrapping-on-each-evaluation.js

@@ -16,9 +16,9 @@ assert.sameValue(
 const r = new Realm();
 
 r.evaluate(`
-function fn() {
+0, function fn() {
     return 42;
-}
+};
 `);
 
 const wrapped = r.evaluate('fn');

test/built-ins/Realm/prototype/importValue/not-constructor.js

@@ -21,5 +21,11 @@ assert.sameValue(
 );
 
 assert.throws(TypeError, () => {
-  new Realm.prototype.importValue("");
+  new Realm.prototype.importValue("", "name");
 }, '`new Realm.prototype.importValue("")` throws TypeError');
+
+const r = new Realm(); 
+
+assert.throws(TypeError, () => {
+  new r.imporValue("./import-value_FIXTURE.js", "x");
+}, '`new r.imporValue("...")` throws TypeError');

test/built-ins/Realm/prototype/importValue/validates-realm-object.js

@@ -17,5 +17,5 @@ const r = new Realm();
 const bogus = {};
 
 assert.throws(TypeError, function() {
-  r.importValue.call(bogus);
+  r.importValue.call(bogus, "specifier", "name");
 }, 'throws a TypeError if this is not a Realm object');