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LibJS: Make string to integer parsing for properties more strict

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This does break two TypedArray test262 test but those really were not
  correct because hasProperty was not implemented
This commit is contained in:
davidot 2021-06-22 20:13:42 +02:00 committed by Linus Groh
parent 105e72cdad
commit f7e2994f35
Notes: sideshowbarker 2024-07-18 11:39:05 +09:00 
Author: https://github.com/davidot
Commit: https://github.com/SerenityOS/serenity/commit/f7e2994f35e
Pull-request: https://github.com/SerenityOS/serenity/pull/8191
3 changed files with 62 additions and 7 deletions
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13
Userland/Libraries/LibJS/Runtime/PropertyName.h
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@ -113,6 +113,19 @@ public:
bool try_coerce_into_number()
{
VERIFY(m_string_may_be_number);
if (m_string.is_empty()) {
m_string_may_be_number = false;
return false;
}
if (char first = m_string.characters()[0]; first < '0' || first > '9') {
m_string_may_be_number = false;
return false;
} else if (m_string.length() > 1 && first == '0') {
m_string_may_be_number = false;
return false;
}
i32 property_index = m_string.to_int(TrimWhitespace::No).value_or(-1);
if (property_index < 0) {
m_string_may_be_number = false;

49
Userland/Libraries/LibJS/Tests/builtins/Array/array-index-from-string.js Normal file
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@ -0,0 +1,49 @@
describe("normal behavior", () => {
var arr = [3, 4, 5];
test("basic", () => {
expect(arr["0"]).toBe(3);
expect(arr["1"]).toBe(4);
expect(arr["2"]).toBe(5);
});
test("above length", () => {
expect(arr["3"]).toBeUndefined();
});
});
describe("strings with extra characters", () => {
var arr = [3, 4, 5];
test("whitespace", () => {
expect(arr[" 0"]).toBeUndefined();
expect(arr["0 "]).toBeUndefined();
expect(arr[" 0"]).toBeUndefined();
expect(arr[" 0 "]).toBeUndefined();
expect(arr[" 3 "]).toBeUndefined();
});
test("leading 0", () => {
expect(arr["00"]).toBeUndefined();
expect(arr["01"]).toBeUndefined();
expect(arr["02"]).toBeUndefined();
expect(arr["03"]).toBeUndefined();
});
test("leading +/-", () => {
["+", "-"].forEach(op => {
expect(arr[op + "0"]).toBeUndefined();
expect(arr[op + "1"]).toBeUndefined();
expect(arr[op + "-0"]).toBeUndefined();
expect(arr[op + "+0"]).toBeUndefined();
});
});
test("combined", () => {
expect(arr["+00"]).toBeUndefined();
expect(arr[" +0"]).toBeUndefined();
expect(arr[" +0 "]).toBeUndefined();
expect(arr[" 00 "]).toBeUndefined();
});
});

7
Userland/Libraries/LibJS/Tests/builtins/Array/array-index-number-whitespace.js
View File

@ -1,7 +0,0 @@
test("indexing the array doesn't strip whitespace if it's a number", () => {
var a = [];
a[1] = 1;
expect(a["1"]).toBe(1);
expect(a[" 1 "]).toBeUndefined();
});