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Implement Object.setPrototypeOf from ES2015 specification (#1666)

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`Object.prototype.__proto__` has been implemented by most JS
engines to give R/W access to prototype chains, well before it made
it into the standard. JerryScript has decided not to implement it,
exactly because it was not part of ES 5.1. The only fully
ES5.1-compatible way of accessing the prototype chain is
`Object.getPrototypeOf` for reading.

However, ES2015 defines `Object.setPrototypeOf` for rewriting the
prototype chain, and JerryScript has now an ES2015 subset profile.
So, this commit adds its implementation to JerryScript.

Note, this commit does _not_ add `Object.prototype.__proto__`,
since that is in the Annex B of ES2015 specification, which is
optional for non-web-browser hosts.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu
This commit is contained in:
Akos Kiss
2017-03-21 10:11:07 +01:00
committed by GitHub
parent 868ba92e02
commit e66bb5591d
11 changed files with 372 additions and 2 deletions
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tests/jerry-test-suite/es2015/19/19.01/19.01.02/19.01.02-001.js
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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function test_set_prototype_of_error(o, proto, msg)
{
var name = "";
try
{
Object.setPrototypeOf(o, proto);
}
catch (e)
{
name = e.name;
}
assert(name === "TypeError");
if (msg)
{
print(msg + " PASS (XFAIL)");
}
}
(function test_incoercible_o(undefined)
{
test_set_prototype_of_error(undefined, new Object(), "Object.setPrototypeOf(undefined, ...)");
test_set_prototype_of_error(null, new Object(), "Object.setPrototypeOf(null, ...)");
})();
tests/jerry-test-suite/es2015/19/19.01/19.01.02/19.01.02-002.js
+43
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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function test_set_prototype_of_error(o, proto, msg)
{
var name = "";
try
{
Object.setPrototypeOf(o, proto);
}
catch (e)
{
name = e.name;
}
assert(name === "TypeError");
if (msg)
{
print(msg + " PASS (XFAIL)");
}
}
(function test_nonobject_proto(undefined)
{
test_set_prototype_of_error(new Object(), undefined, "Object.setPrototypeOf(..., undefined)");
test_set_prototype_of_error(new Object(), true, "Object.setPrototypeOf(..., boolean)");
test_set_prototype_of_error(new Object(), 3.14, "Object.setPrototypeOf(..., number)");
test_set_prototype_of_error(new Object(), "xyz", "Object.setPrototypeOf(..., string)");
})()
tests/jerry-test-suite/es2015/19/19.01/19.01.02/19.01.02-003.js
+31
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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function test_set_prototype_of_success(o, proto, msg)
{
assert(o === Object.setPrototypeOf(o, proto));
if (msg)
{
print(msg + " PASS");
}
}
(function test_nonobject_o(undefined)
{
test_set_prototype_of_success(true, new Object(), "Object.setPrototypeOf(boolean, ...)");
test_set_prototype_of_success(3.14, new Object(), "Object.setPrototypeOf(number, ...)");
test_set_prototype_of_success("xyz", new Object(), "Object.setPrototypeOf(string, ...)");
})()
tests/jerry-test-suite/es2015/19/19.01/19.01.02/19.01.02-004.js
+56
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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function test_set_prototype_of_error(o, proto, msg)
{
var name = "";
try
{
Object.setPrototypeOf(o, proto);
}
catch (e)
{
name = e.name;
}
assert(name === "TypeError");
if (msg)
{
print(msg + " PASS (XFAIL)");
}
}
function test_set_prototype_of_success_set(o, proto, msg)
{
assert(o === Object.setPrototypeOf(o, proto));
assert(proto === Object.getPrototypeOf(o));
if (msg)
{
print(msg + " PASS");
}
}
(function test_nonextensible_o(undefined)
{
var o = new Object();
var o_proto = Object.getPrototypeOf(o);
Object.preventExtensions(o);
test_set_prototype_of_success_set(o, o_proto, "Object.setPrototypeOf(o_nonext, o_nonext.__proto__)");
test_set_prototype_of_error(o, new Object(), "Object.setPrototypeOf(o_nonext, ...)");
})()
tests/jerry-test-suite/es2015/19/19.01/19.01.02/19.01.02-005.js
+42
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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function test_set_prototype_of_error(o, proto, msg)
{
var name = "";
try
{
Object.setPrototypeOf(o, proto);
}
catch (e)
{
name = e.name;
}
assert(name === "TypeError");
if (msg)
{
print(msg + " PASS (XFAIL)");
}
}
(function test_circularity(undefined)
{
var o = new Object();
test_set_prototype_of_error(o, o, "Object.setPrototypeOf(o, o)");
})()
tests/jerry-test-suite/es2015/19/19.01/19.01.02/19.01.02-006.js
+31
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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function test_set_prototype_of_success_set(o, proto, msg)
{
assert(o === Object.setPrototypeOf(o, proto));
assert(proto === Object.getPrototypeOf(o));
if (msg)
{
print(msg + " PASS");
}
}
(function test_set_prototype_of(undefined)
{
test_set_prototype_of_success_set(new Object(), new Object(), "Object.setPrototypeOf(o1, o2)");
test_set_prototype_of_success_set(new Object(), null, "Object.setPrototypeOf(o, null)");
})()