Coverage gaps found by quickjs. Fixes gh-2370

test/language/expressions/delete/non-reference-return-true.js

@@ -27,6 +27,7 @@ assert.sameValue(delete 0, true, 'delete 0');
 assert.sameValue(delete 1, true, 'delete 1');
 assert.sameValue(delete '', true, 'delete ""');
 assert.sameValue(delete 'Test262', true, 'delete "Test262"');
+assert.sameValue(delete 'Test262'[100], true, 'delete "Test262"[100]');
 assert.sameValue(delete typeof +-~!0, true, 'delete typeof +-~!0');
 assert.sameValue(delete +-~!0, true, 'delete +-~!0');
 assert.sameValue(delete -~!0, true, 'delete -~!0');

test/language/expressions/delete/super-property-method.js

@@ -0,0 +1,23 @@
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-delete-operator-runtime-semantics-evaluation
+description: Attempts to delete super reference property references throws ReferenceError exception
+features: [class]
+---*/
+
+class X {
+  method() { return this; }
+}
+
+class Y extends X {
+  method() {
+    delete super.method;
+  }
+}
+
+const y = new Y();
+
+assert.throws(ReferenceError, () => {
+  y.method();
+});

test/language/expressions/delete/super-property.js

@@ -2,7 +2,6 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 esid: sec-delete-operator-runtime-semantics-evaluation
-es6id: 12.5.4.2
 description: SuperReferences may not be deleted
 info: |
   [...]
@@ -11,26 +10,13 @@ info: |
 features: [class]
 ---*/
 
-var caught;
-
 class C extends Object {
   constructor() {
     super();
-    try {
-      delete super.x;
-    } catch (err) {
-      caught = err;
-    }
+    delete super.x;
   }
 }
 
-// When the "construct" invocation completes and the "this" value is
-// uninitialized, the specification dictates that a ReferenceError must be
-// thrown. That behavior is tested elsewhere, so the error is ignored (if it is
-// produced at all).
-try {
+assert.throws(ReferenceError, () => {
   new C();
-} catch (_) {}
-
-assert.sameValue(typeof caught, 'object');
-assert.sameValue(caught.constructor, ReferenceError);
+});