57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
test("length is 2", () => {
|
|
expect(Object.defineProperties).toHaveLength(2);
|
|
});
|
|
|
|
describe("errors", () => {
|
|
test("non-object argument", () => {
|
|
expect(() => Object.defineProperties(42, {})).toThrowWithMessage(
|
|
TypeError,
|
|
"Object argument is not an object"
|
|
);
|
|
});
|
|
});
|
|
|
|
describe("normal behavior", () => {
|
|
test("returns given object", () => {
|
|
const o = {};
|
|
expect(Object.defineProperties(o, {})).toBe(o);
|
|
});
|
|
|
|
test("defines given properties on object", () => {
|
|
const properties = {
|
|
foo: {
|
|
writable: true,
|
|
configurable: true,
|
|
value: "foo",
|
|
},
|
|
bar: {
|
|
enumerable: true,
|
|
value: "bar",
|
|
},
|
|
baz: {
|
|
get() {},
|
|
set() {},
|
|
},
|
|
};
|
|
const o = Object.defineProperties({}, properties);
|
|
expect(Object.getOwnPropertyNames(o)).toEqual(["foo", "bar", "baz"]);
|
|
expect(Object.getOwnPropertyDescriptor(o, "foo")).toEqual({
|
|
value: "foo",
|
|
writable: true,
|
|
enumerable: false,
|
|
configurable: true,
|
|
});
|
|
expect(Object.getOwnPropertyDescriptor(o, "bar")).toEqual({
|
|
value: "bar",
|
|
writable: false,
|
|
enumerable: true,
|
|
configurable: false,
|
|
});
|
|
expect(Object.getOwnPropertyDescriptor(o, "baz")).toEqual({
|
|
get: properties.baz.get,
|
|
set: properties.baz.set,
|
|
enumerable: false,
|
|
configurable: false,
|
|
});
|
|
});
|
|
});
|