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describe("correct behavior", () => {
test("basic functionality", () => {
class A {
static get x() {
return this._x;
}
static set x(value) {
this._x = value * 2;
}
}
expect(A.x).toBeUndefined();
expect(A).not.toHaveProperty("_x");
A.x = 3;
expect(A.x).toBe(6);
expect(A).toHaveProperty("_x", 6);
});
test("name", () => {
class A {
static set x(v) {}
}
const d = Object.getOwnPropertyDescriptor(A, "x");
expect(d.set.name).toBe("set x");
});
test("extended name syntax", () => {
const s = Symbol("foo");
class A {
static set "method with space"(value) {
this.a = value;
}
static set 12(value) {
this.b = value;
}
static set [`he${"llo"}`](value) {
this.c = value;
}
static set [s](value) {
this.d = value;
}
}
A["method with space"] = 1;
A[12] = 2;
A.hello = 3;
A[s] = 4;
expect(A.a).toBe(1);
expect(A.b).toBe(2);
expect(A.c).toBe(3);
expect(A.d).toBe(4);
});
test("inherited static setter", () => {
class Parent {
static get x() {
return this._x;
}
static set x(value) {
this._x = value * 2;
}
}
class Child extends Parent {}
expect(Child.x).toBeUndefined();
Child.x = 10;
expect(Child.x).toBe(20);
});
test("inherited static setter overriding", () => {
class Parent {
static get x() {
return this._x;
}
static set x(value) {
this._x = value * 2;
}
}
class Child extends Parent {
static get x() {
return this._x;
}
static set x(value) {
this._x = value * 3;
}
}
expect(Child.x).toBeUndefined();
Child.x = 10;
expect(Child.x).toBe(30);
});
});
describe("errors", () => {
test('"set static" is a syntax error', () => {
expect(`
class A {
set static foo(value) {}
}`).not.toEval();
});
});
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