Adding case where the usage of private field inside computed property should throw a TypeError. (#2298)

test/language/statements/class/elements/private-field-with-initialized-id-is-visible-in-computed-properties.js

@@ -0,0 +1,76 @@
+// Copyright (C) 2019 Caio Lima (Igalia SL). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: PrivateName of a class is visible in its ComputetProperty scope
+esid: prod-ClassTail
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    1. Let lex be the LexicalEnvironment of the running execution context.
+    2. Let classScope be NewDeclarativeEnvironment(lex).
+    3. Let classScopeEnvRec be classScope's EnvironmentRecord.
+    ...
+    8. If ClassBodyopt is present, then
+        a. For each element dn of the PrivateBoundIdentifiers of ClassBodyopt,
+          i. Perform classPrivateEnvRec.CreateImmutableBinding(dn, true).
+    ...
+    15. Set the running execution context's LexicalEnvironment to classScope.
+    16. Set the running execution context's PrivateEnvironment to classPrivateEnvironment.
+    ...
+    27. For each ClassElement e in order from elements
+      a. If IsStatic of e is false, then
+        i. Let field be the result of ClassElementEvaluation for e with arguments proto and false.
+    ...
+
+  FieldDefinition : ClassElementName Initializer
+    1. Let name be the result of evaluating ClassElementName.
+    ...
+
+  ClassElementName : PrivateIdentifier
+    1. Let privateIdentifier be StringValue of PrivateIdentifier.
+    2. Let privateName be NewPrivateName(privateIdentifier).
+    3. Let scope be the running execution context's PrivateEnvironment.
+    4. Let scopeEnvRec be scope's EnvironmentRecord.
+    5. Perform ! scopeEnvRec.InitializeBinding(privateIdentifier, privateName).
+    6. Return privateName.
+
+  MemberExpression : MemberExpression . PrivateIdentifier
+    ...
+    5. Return MakePrivateReference(bv, fieldNameString).
+
+  MakePrivateReference ( baseValue, privateIdentifier )
+    ...
+    2. Let privateNameBinding be ? ResolveBinding(privateIdentifier, env).
+    3. Let privateName be GetValue(privateNameBinding).
+    ...
+
+  GetValue (V)
+    ...
+    5. If IsPropertyReference(V), then
+      a. If HasPrimitiveBase(V), then
+        i. Assert: In this case, base will never be null or undefined.
+        ii. Let base be ToObject(base).
+      b. If IsPrivateReference(V), then
+        i. Return ? PrivateFieldGet(GetReferencedName(V), base).
+    6. Else,
+      a. Assert: base is an Environment Record.
+      b. Return ? base.GetBindingValue(GetReferencedName(V), IsStrictReference(V)).
+
+  PrivateFieldGet (P, O)
+    1. Assert: P is a Private Name.
+    2. Assert: Type(O) is Object.
+    3. Let entry be PrivateFieldFind(P, O).
+    4. If entry is empty, throw a TypeError exception.
+    5. Return entry.[[PrivateFieldValue]].
+
+features: [class-fields-private, class]
+---*/
+
+const self = this;
+assert.throws(TypeError, function() {
+  class C {
+    #f = 'foo';
+    [self.#f] = 'Test262';
+  }
+}, 'access to a not defined private field in object should throw a TypeError');
+