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Serenity Operating System
1test("basic functionality", () => {
2 let callHoisted = hoisted();
3 function hoisted() {
4 return "foo";
5 }
6 expect(hoisted()).toBe("foo");
7 expect(callHoisted).toBe("foo");
8});
9
10// First two calls produce a ReferenceError, but the declarations should be hoisted
11test("functions are hoisted across non-lexical scopes", () => {
12 expect(scopedHoisted).toBeUndefined();
13 expect(callScopedHoisted).toBeUndefined();
14 {
15 var callScopedHoisted = scopedHoisted();
16 function scopedHoisted() {
17 return "foo";
18 }
19 expect(scopedHoisted()).toBe("foo");
20 expect(callScopedHoisted).toBe("foo");
21 }
22 expect(scopedHoisted()).toBe("foo");
23 expect(callScopedHoisted).toBe("foo");
24});
25
26test("functions are not hoisted across lexical scopes", () => {
27 const test = () => {
28 var iife = (function () {
29 return declaredLater();
30 })();
31 function declaredLater() {
32 return "yay";
33 }
34 return iife;
35 };
36
37 expect(() => declaredLater).toThrow(ReferenceError);
38 expect(test()).toBe("yay");
39});