// file, You can obtain one at <https://mozilla.org/MPL/2.0/>.
import {
- assert,
assertEquals,
- assertNotStrictEquals,
assertStrictEquals,
assertThrows,
describe,
isDataDescriptor,
isFullyPopulatedDescriptor,
isGenericDescriptor,
- isPropertyDescriptorRecord,
ITERATOR,
LN10,
LN2,
toIndex,
toLength,
toPrimitive,
- toPropertyDescriptor,
+ toPropertyKey,
type,
UNDEFINED,
UNSCOPABLES,
});
});
-describe("isPropertyDescriptorRecord", () => {
- it("[[Call]] returns true for objects created by toPropertyDescriptor", () => {
- assertStrictEquals(
- isPropertyDescriptorRecord(toPropertyDescriptor({})),
- true,
- );
- });
-
- it("[[Get]] returns false for other objects", () => {
- assertStrictEquals(
- isPropertyDescriptorRecord(Object.create(null)),
- false,
- );
- });
-
- it("[[Get]] returns false for undefined", () => {
- assertStrictEquals(isPropertyDescriptorRecord(undefined), false);
- });
-
- it("[[Construct]] throws an error", () => {
- assertThrows(() => new isPropertyDescriptorRecord({}));
- });
-
- describe(".length", () => {
- it("[[Get]] returns the correct length", () => {
- assertStrictEquals(isPropertyDescriptorRecord.length, 1);
- });
- });
-
- describe(".name", () => {
- it("[[Get]] returns the correct name", () => {
- assertStrictEquals(
- isPropertyDescriptorRecord.name,
- "isPropertyDescriptorRecord",
- );
- });
- });
-});
-
describe("ordinaryToPrimitive", () => {
it("[[Call]] prefers `valueOf` by default", () => {
const obj = {
});
});
-describe("toPropertyDescriptor", () => {
- it("[[Call]] creates a new property descriptor record", () => {
- const obj = {};
- const desc = toPropertyDescriptor(obj);
- assertEquals(obj, desc);
- assertNotStrictEquals(obj, desc);
+describe("toPropertyKey", () => {
+ it("returns a string or symbol", () => {
+ const sym = Symbol();
+ assertStrictEquals(toPropertyKey(sym), sym);
+ assertStrictEquals(
+ toPropertyKey(new String("success")),
+ "success",
+ );
});
- it("[[Call]] coerces the values", () => {
- assertEquals(
- toPropertyDescriptor({
- configurable: undefined,
- enumerable: undefined,
- writable: undefined,
+ it("favours the `toString` representation", () => {
+ assertStrictEquals(
+ toPropertyKey({
+ toString() {
+ return "success";
+ },
+ valueOf() {
+ return "failure";
+ },
}),
- { configurable: false, enumerable: false, writable: false },
+ "success",
);
});
- it("[[Construct]] throws for primitives", () => {
- assertThrows(() => toPropertyDescriptor(undefined));
- assertThrows(() => toPropertyDescriptor("failure"));
- });
-
it("[[Construct]] throws an error", () => {
- assertThrows(() => new toPropertyDescriptor({}));
+ assertThrows(() => new toPropertyKey(""));
});
describe(".length", () => {
it("[[Get]] returns the correct length", () => {
- assertStrictEquals(toPropertyDescriptor.length, 1);
+ assertStrictEquals(toPropertyKey.length, 1);
});
});
describe(".name", () => {
it("[[Get]] returns the correct name", () => {
- assertStrictEquals(
- toPropertyDescriptor.name,
- "toPropertyDescriptor",
- );
- });
- });
-
- describe("~configurable", () => {
- it("[[DefineOwnProperty]] coerces to a boolean", () => {
- const desc = toPropertyDescriptor({});
- Object.defineProperty(desc, "configurable", {});
- assertStrictEquals(desc.configurable, false);
- });
-
- it("[[DefineOwnProperty]] throws for accessor properties", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(() =>
- Object.defineProperty(desc, "configurable", { get: undefined })
- );
- });
-
- it("[[Set]] coerces to a boolean", () => {
- const desc = toPropertyDescriptor({});
- desc.configurable = undefined;
- assertStrictEquals(desc.configurable, false);
- });
-
- it("[[Delete]] works", () => {
- const desc = toPropertyDescriptor({ configurable: false });
- delete desc.configurable;
- assert(!("configurable" in desc));
- });
- });
-
- describe("~enumerable", () => {
- it("[[DefineOwnProperty]] coerces to a boolean", () => {
- const desc = toPropertyDescriptor({});
- Object.defineProperty(desc, "enumerable", {});
- assertStrictEquals(desc.enumerable, false);
- });
-
- it("[[DefineOwnProperty]] throws for accessor properties", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(() =>
- Object.defineProperty(desc, "enumerable", { get: undefined })
- );
- });
-
- it("[[Set]] coerces to a boolean", () => {
- const desc = toPropertyDescriptor({});
- desc.enumerable = undefined;
- assertStrictEquals(desc.enumerable, false);
- });
-
- it("[[Delete]] works", () => {
- const desc = toPropertyDescriptor({ enumerable: false });
- delete desc.enumerable;
- assert(!("enumerable" in desc));
- });
- });
-
- describe("~get", () => {
- it("[[DefineOwnProperty]] works", () => {
- const desc = toPropertyDescriptor({});
- Object.defineProperty(desc, "get", {});
- assertStrictEquals(desc.get, undefined);
- });
-
- it("[[DefineOwnProperty]] throws for accessor properties", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(() =>
- Object.defineProperty(desc, "get", { get: undefined })
- );
- });
-
- it("[[DefineOwnProperty]] throws if not callable or undefined", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(
- () => Object.defineProperty(desc, "get", { value: null }),
- );
- });
-
- it("[[DefineOwnProperty]] throws if a data property is defined", () => {
- const desc = toPropertyDescriptor({ value: undefined });
- assertThrows(() => Object.defineProperty(desc, "get", {}));
- });
-
- it("[[Set]] works", () => {
- const desc = toPropertyDescriptor({});
- const fn = () => {};
- desc.get = fn;
- assertStrictEquals(desc.get, fn);
- });
-
- it("[[Set]] throws if not callable or undefined", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(() => desc.get = null);
- });
-
- it("[[Set]] throws if a data property is defined", () => {
- const desc = toPropertyDescriptor({ value: undefined });
- assertThrows(() => desc.get = undefined);
- });
-
- it("[[Delete]] works", () => {
- const desc = toPropertyDescriptor({ get: undefined });
- delete desc.get;
- assert(!("get" in desc));
- });
- });
-
- describe("~set", () => {
- it("[[DefineOwnProperty]] works", () => {
- const desc = toPropertyDescriptor({});
- Object.defineProperty(desc, "set", {});
- assertStrictEquals(desc.set, undefined);
- });
-
- it("[[DefineOwnProperty]] throws for accessor properties", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(() =>
- Object.defineProperty(desc, "set", { get: undefined })
- );
- });
-
- it("[[DefineOwnProperty]] throws if not callable or undefined", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(
- () => Object.defineProperty(desc, "set", { value: null }),
- );
- });
-
- it("[[DefineOwnProperty]] throws if a data property is defined", () => {
- const desc = toPropertyDescriptor({ value: undefined });
- assertThrows(() => Object.defineProperty(desc, "set", {}));
- });
-
- it("[[Set]] works", () => {
- const desc = toPropertyDescriptor({});
- const fn = (_) => {};
- desc.set = fn;
- assertStrictEquals(desc.set, fn);
- });
-
- it("[[Set]] throws if not callable or undefined", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(() => desc.set = null);
- });
-
- it("[[Set]] throws if a data property is defined", () => {
- const desc = toPropertyDescriptor({ value: undefined });
- assertThrows(() => desc.set = undefined);
- });
-
- it("[[Delete]] works", () => {
- const desc = toPropertyDescriptor({ set: undefined });
- delete desc.set;
- assert(!("set" in desc));
- });
- });
-
- describe("~value", () => {
- it("[[DefineOwnProperty]] works", () => {
- const desc = toPropertyDescriptor({});
- Object.defineProperty(desc, "value", {});
- assertStrictEquals(desc.value, undefined);
- });
-
- it("[[DefineOwnProperty]] throws for accessor properties", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(() =>
- Object.defineProperty(desc, "value", { get: undefined })
- );
- });
-
- it("[[DefineOwnProperty]] throws if an accessor property is defined", () => {
- const desc = toPropertyDescriptor({ get: undefined });
- assertThrows(() => Object.defineProperty(desc, "value", {}));
- });
-
- it("[[Set]] works", () => {
- const desc = toPropertyDescriptor({});
- desc.value = "success";
- assertStrictEquals(desc.value, "success");
- });
-
- it("[[Set]] throws if an accessor property is defined", () => {
- const desc = toPropertyDescriptor({ get: undefined });
- assertThrows(() => desc.value = null);
- });
-
- it("[[Delete]] works", () => {
- const desc = toPropertyDescriptor({ value: undefined });
- delete desc.value;
- assert(!("value" in desc));
- });
- });
-
- describe("~writable", () => {
- it("[[DefineOwnProperty]] coerces to a boolean", () => {
- const desc = toPropertyDescriptor({});
- Object.defineProperty(desc, "writable", {});
- assertStrictEquals(desc.writable, false);
- });
-
- it("[[DefineOwnProperty]] throws for accessor properties", () => {
- const desc = toPropertyDescriptor({});
- assertThrows(() =>
- Object.defineProperty(desc, "writable", { get: undefined })
- );
- });
-
- it("[[DefineOwnProperty]] throws if an accessor property is defined", () => {
- const desc = toPropertyDescriptor({ get: undefined });
- assertThrows(() => Object.defineProperty(desc, "writable", {}));
- });
-
- it("[[Set]] coerces to a boolean", () => {
- const desc = toPropertyDescriptor({});
- desc.writable = undefined;
- assertStrictEquals(desc.writable, false);
- });
-
- it("[[Set]] throws if an accessor property is defined", () => {
- const desc = toPropertyDescriptor({ get: undefined });
- assertThrows(() => desc.writable = false);
- });
-
- it("[[Delete]] works", () => {
- const desc = toPropertyDescriptor({ writable: false });
- delete desc.writable;
- assert(!("writable" in desc));
+ assertStrictEquals(toPropertyKey.name, "toPropertyKey");
});
});
});
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