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var foo = 1;
let bar = 2;
const baz = 3;
test("behavior of program-level var/let/const", () => {
expect(foo).toBe(1);
expect(bar).toBe(2);
expect(baz).toBe(3);
expect(globalThis.foo).toBe(1);
expect(globalThis.bar).toBeUndefined();
expect(globalThis.baz).toBeUndefined();
globalThis.foo = 4;
globalThis.bar = 5;
globalThis.baz = 6;
expect(foo).toBe(4);
expect(bar).toBe(2);
expect(baz).toBe(3);
expect(globalThis.foo).toBe(4);
expect(globalThis.bar).toBe(5);
expect(globalThis.baz).toBe(6);
});
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