38fd980b0c
The parser now keeps track of a scope chain so that it can hoist function declarations to the closest function scope.
39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
test("basic functionality", () => {
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let callHoisted = hoisted();
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function hoisted() {
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return "foo";
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}
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expect(hoisted()).toBe("foo");
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expect(callHoisted).toBe("foo");
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});
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// First two calls produce a ReferenceError, but the declarations should be hoisted
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test("functions are hoisted across non-lexical scopes", () => {
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expect(scopedHoisted).toBeUndefined();
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expect(callScopedHoisted).toBeUndefined();
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{
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var callScopedHoisted = scopedHoisted();
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function scopedHoisted() {
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return "foo";
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}
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expect(scopedHoisted()).toBe("foo");
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expect(callScopedHoisted).toBe("foo");
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}
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expect(scopedHoisted()).toBe("foo");
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expect(callScopedHoisted).toBe("foo");
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});
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test("functions are not hoisted across lexical scopes", () => {
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const test = () => {
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var iife = (function () {
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return declaredLater();
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})();
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function declaredLater() {
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return "yay";
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}
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return iife;
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};
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expect(() => declaredLater).toThrow(ReferenceError);
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expect(test()).toBe("yay");
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});
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