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LibJS: Support multiple arguments in Array constructor

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Linus Groh 2020-05-08 16:23:56 +01:00 • committed by Andreas Kling
parent 8137f40b73
commit 01fd6ce045
2 changed files with 41 additions and 5 deletions
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17
Libraries/LibJS/Runtime/ArrayConstructor.cpp
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@ -1,5 +1,6 @@
/* /*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org> * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
* All rights reserved. * All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
@ -29,6 +30,7 @@
#include <LibJS/Interpreter.h> #include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Array.h> #include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/ArrayConstructor.h> #include <LibJS/Runtime/ArrayConstructor.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h> #include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Shape.h> #include <LibJS/Runtime/Shape.h>
@ -50,14 +52,21 @@ Value ArrayConstructor::call(Interpreter& interpreter)
if (interpreter.argument_count() <= 0) if (interpreter.argument_count() <= 0)
return Array::create(interpreter.global_object()); return Array::create(interpreter.global_object());
if (interpreter.argument_count() == 1) { if (interpreter.argument_count() == 1 && interpreter.argument(0).is_number()) {
auto array_length_value = interpreter.argument(0);
if (!array_length_value.is_integer() || array_length_value.to_i32() < 0) {
interpreter.throw_exception<TypeError>("Invalid array length");
return {};
}
auto* array = Array::create(interpreter.global_object()); auto* array = Array::create(interpreter.global_object());
array->elements().resize(interpreter.argument(0).to_i32()); array->elements().resize(array_length_value.to_i32());
return array; return array;
} }
// FIXME: Handle "new Array(element0, element1, ...)" auto* array = Array::create(interpreter.global_object());
ASSERT_NOT_REACHED(); for (size_t i = 0; i < interpreter.argument_count(); ++i)
array->elements().append(interpreter.argument(i));
return array;
} }
Value ArrayConstructor::construct(Interpreter& interpreter) Value ArrayConstructor::construct(Interpreter& interpreter)

29
Libraries/LibJS/Tests/Array.js
View file

@ -8,9 +8,36 @@ try {
assert(typeof Array() === "object"); assert(typeof Array() === "object");
assert(typeof new Array() === "object"); assert(typeof new Array() === "object");
var a = new Array(5); var a;
a = new Array(5);
assert(a.length === 5); assert(a.length === 5);
a = new Array("5");
assert(a.length === 1);
assert(a[0] === "5");
a = new Array(1, 2, 3);
assert(a.length === 3);
assert(a[0] === 1);
assert(a[1] === 2);
assert(a[2] === 3);
a = new Array([1, 2, 3]);
assert(a.length === 1);
assert(a[0][0] === 1);
assert(a[0][1] === 2);
assert(a[0][2] === 3);
[-1, -100, -0.1, 0.1, 1.23, Infinity, -Infinity, NaN].forEach(value => {
assertThrowsError(() => {
new Array(value);
}, {
error: TypeError,
message: "Invalid array length"
});
});
console.log("PASS"); console.log("PASS");
} catch (e) { } catch (e) {
console.log("FAIL: " + e); console.log("FAIL: " + e);