mirror of
https://github.com/RGBCube/serenity
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565a26808d
Two issues:
- throw_exception() with ErrorType::InstanceOfOperatorBadPrototype would
receive rhs_prototype.to_string_without_side_effects(), which would
ASSERT_NOT_REACHED() as to_string_without_side_effects() must not be
called on an empty value. It should (and now does) receive the RHS
value instead as the message is "'prototype' property of {} is not an
object".
- Value::instance_of() was missing an exception check after calling
has_instance_method, to_boolean() on an empty value result would crash
as well.
Fixes #3930.
36 lines
750 B
JavaScript
36 lines
750 B
JavaScript
test("basic functionality", () => {
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function Foo() {
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this.x = 123;
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}
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const foo = new Foo();
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expect(foo instanceof Foo).toBeTrue();
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});
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test("derived ES5 classes", () => {
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function Base() {
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this.is_base = true;
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}
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function Derived() {
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this.is_derived = true;
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}
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Object.setPrototypeOf(Derived.prototype, Base.prototype);
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const d = new Derived();
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expect(d instanceof Derived).toBeTrue();
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expect(d instanceof Base).toBeTrue();
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});
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test("issue #3930, instanceof on arrow function", () => {
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function f() {}
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const a = () => {};
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expect(() => {
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f instanceof a;
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}).toThrow(TypeError);
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expect(() => {
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a instanceof a;
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}).toThrow(TypeError);
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});
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