From a6e9a4ea1a0a12c11ff4ab6fd7d6a5b341b6272e Mon Sep 17 00:00:00 2001
From: Valerie R Young <valerie@bocoup.com>
Date: Wed, 1 Nov 2017 17:40:00 -0400
Subject: [PATCH] classfields: PrivateFieldAdd TypeError test
---
.../class/privatefieldadd-typeerror.js | 60 +++++++++++++++++++
1 file changed, 60 insertions(+)
create mode 100644 test/language/statements/class/privatefieldadd-typeerror.js
diff --git a/test/language/statements/class/privatefieldadd-typeerror.js b/test/language/statements/class/privatefieldadd-typeerror.js
new file mode 100644
index 0000000000..bf51214567
--- /dev/null
+++ b/test/language/statements/class/privatefieldadd-typeerror.js
@@ -0,0 +1,60 @@
+// Copyright (C) 2017 Valerie Young. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Class construction should error if attempting to add private field twice
+esid: sec-ecmascript-function-objects-construct-argumentslist-newtarget
+info: |
+ [[Construct]] ( argumentsList, newTarget)
+ ...
+ 8. If kind is "base", then
+ a. Perform OrdinaryCallBindThis(F, calleeContext, thisArgument).
+ b. Let result be InitializeInstanceFields(thisArgument, F).
+ c. If result is an abrupt completion, then
+ i. Remove calleeContext from execution context stack and restore callerContext as the running execution context.
+ ii. Return Completion(result).
+
+ InitializeInstanceFields ( O, constructor )
+ 1. Assert: Type ( O ) is Object.
+ 2. Assert: Assert constructor is an ECMAScript function object.
+ 3. Let fieldRecords be the value of constructor's [[Fields]] internal slot.
+ 4. For each item fieldRecord in order from fieldRecords,
+ a. If fieldRecord.[[static]] is false, then
+ i. Perform ? DefineField(O, fieldRecord).
+
+ DefineField(receiver, fieldRecord)
+ ...
+ 8. If fieldName is a Private Name,
+ a. Perform ? PrivateFieldAdd(fieldName, receiver, initValue).
+
+ PrivateFieldAdd (P, O, value)
+ 1. Assert: P is a Private Name value.
+ 2. If O is not an object, throw a TypeError exception.
+ 3. Let entry be PrivateFieldFind(P, O).
+ 4. If entry is not empty, throw a TypeError exception.
+
+features: [class-fields]
+---*/
+
+
+class A {
+ constructor(arg) {
+ return arg;
+ }
+}
+
+class C extends A {
+ #x;
+
+ constructor(arg) {
+ super(arg);
+ }
+}
+
+var containsprivatex = new C();
+
+assert.throws(TypeError, function() {
+ // After the super call in C's constructor, the `this` value in C will
+ // already have "#x" in it's [[PrivateFieldValues]]
+ new C(containsprivatex);
+})
--
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