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test("basic functionality", () => {
var a = [1, 2, 3];
expect(typeof a).toBe("object");
expect(a).toHaveLength(3);
expect(a[0]).toBe(1);
expect(a[1]).toBe(2);
expect(a[2]).toBe(3);
a[1] = 5;
expect(a[1]).toBe(5);
expect(a).toHaveLength(3);
a.push(7);
expect(a[3]).toBe(7);
expect(a).toHaveLength(4);
a = [,];
expect(a).toHaveLength(1);
expect(a.toString()).toBe("");
expect(a[0]).toBeUndefined();
a = [, , , ,];
expect(a).toHaveLength(4);
expect(a.toString()).toBe(",,,");
expect(a[0]).toBeUndefined();
expect(a[1]).toBeUndefined();
expect(a[2]).toBeUndefined();
expect(a[3]).toBeUndefined();
a = [1, , 2, , , 3];
expect(a).toHaveLength(6);
expect(a.toString()).toBe("1,,2,,,3");
expect(a[0]).toBe(1);
expect(a[1]).toBeUndefined();
expect(a[2]).toBe(2);
expect(a[3]).toBeUndefined();
expect(a[4]).toBeUndefined();
expect(a[5]).toBe(3);
a = [1, , 2, , , 3];
Object.defineProperty(a, 1, {
get() {
return this.getterSetterValue;
},
set(value) {
this.getterSetterValue = value;
},
});
expect(a).toHaveLength(6);
expect(a.toString()).toBe("1,,2,,,3");
expect(a.getterSetterValue).toBeUndefined();
a[1] = 20;
expect(a).toHaveLength(6);
expect(a.toString()).toBe("1,20,2,,,3");
expect(a.getterSetterValue).toBe(20);
});
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