Basic constructor and newtarget tests for DisposableStack

test/built-ins/DisposableStack/constructor.js

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+// Copyright (C) 2023 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-disposablestack-constructor
+description: >
+  The DisposableStack constructor is the %DisposableStack% intrinsic object and the initial
+  value of the DisposableStack property of the global object.
+features: [explicit-resource-management]
+---*/
+
+assert.sameValue(
+  typeof DisposableStack, 'function',
+  'typeof DisposableStack is function'
+);

test/built-ins/DisposableStack/prototype-from-newtarget-abrupt.js

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+// Copyright (C) 2023 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-disposablestack
+description: >
+  Return abrupt from getting the NewTarget prototype
+info: |
+  DisposableStack ( )
+
+  ...
+  2. Let disposableStack be ? OrdinaryCreateFromConstructor(NewTarget, "%DisposableStack.prototype%", « [[DisposableState]], [[DisposeCapability]] »).
+  3. Set disposableStack.[[DisposableState]] to pending.
+  4. Set disposableStack.[[DisposeCapability]] to NewDisposeCapability().
+  5. Return disposableStack.
+
+  OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )
+
+  ...
+  2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
+  3. Return ObjectCreate(proto, internalSlotsList).
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  3. Let proto be ? Get(constructor, 'prototype').
+features: [explicit-resource-management, Reflect.construct]
+---*/
+
+var calls = 0;
+var newTarget = function() {}.bind(null);
+Object.defineProperty(newTarget, 'prototype', {
+  get: function() {
+    calls += 1;
+    throw new Test262Error();
+  }
+});
+
+assert.throws(Test262Error, function() {
+  Reflect.construct(DisposableStack, [], newTarget);
+});
+
+assert.sameValue(calls, 1);

test/built-ins/DisposableStack/prototype-from-newtarget-custom.js

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+// Copyright (C) 2023 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-disposablestack
+description: >
+  The [[Prototype]] internal slot is computed from NewTarget.
+info: |
+  DisposableStack ( )
+
+  ...
+  2. Let disposableStack be ? OrdinaryCreateFromConstructor(NewTarget, "%DisposableStack.prototype%", « [[DisposableState]], [[DisposeCapability]] »).
+  3. Set disposableStack.[[DisposableState]] to pending.
+  4. Set disposableStack.[[DisposeCapability]] to NewDisposeCapability().
+  5. Return disposableStack.
+
+  OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )
+
+  ...
+  2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
+  3. Return ObjectCreate(proto, internalSlotsList).
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  3. Let proto be ? Get(constructor, 'prototype').
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  5. Return proto.
+features: [explicit-resource-management, Reflect.construct]
+---*/
+
+var stack;
+
+stack = Reflect.construct(DisposableStack, [], Object);
+assert.sameValue(Object.getPrototypeOf(stack), Object.prototype, 'NewTarget is built-in Object constructor');
+
+var newTarget = function() {}.bind(null);
+Object.defineProperty(newTarget, 'prototype', {
+  get: function() {
+    return Array.prototype;
+  }
+});
+stack = Reflect.construct(DisposableStack, [], newTarget);
+assert.sameValue(Object.getPrototypeOf(stack), Array.prototype, 'NewTarget is BoundFunction with accessor');

test/built-ins/DisposableStack/prototype-from-newtarget.js

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+// Copyright (C) 2023 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-disposablestack
+description: >
+  The [[Prototype]] internal slot is computed from NewTarget.
+info: |
+  DisposableStack ( )
+
+  ...
+  2. Let disposableStack be ? OrdinaryCreateFromConstructor(NewTarget, "%DisposableStack.prototype%", « [[DisposableState]], [[DisposeCapability]] »).
+  3. Set disposableStack.[[DisposableState]] to pending.
+  4. Set disposableStack.[[DisposeCapability]] to NewDisposeCapability().
+  5. Return disposableStack.
+
+  OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )
+
+  ...
+  2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
+  3. Return ObjectCreate(proto, internalSlotsList).
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  3. Let proto be ? Get(constructor, 'prototype').
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  5. Return proto.
+features: [explicit-resource-management]
+---*/
+
+var stack = new DisposableStack();
+assert.sameValue(Object.getPrototypeOf(stack), DisposableStack.prototype);

test/built-ins/DisposableStack/undefined-newtarget-throws.js

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+// Copyright (C) 2023 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-disposablestack
+description: >
+  Throws a TypeError if NewTarget is undefined.
+info: |
+  DisposableStack ( )
+
+  1. If NewTarget is undefined, throw a TypeError exception.
+  ...
+features: [explicit-resource-management]
+---*/
+
+assert.throws(TypeError, function() {
+  DisposableStack();
+});