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LibJS: Fix Map Iterators when elements are deleted during iteration

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Before this would assume that the element found in operator++ was still
valid when dereferencing it in operator*.
Since any code can have been run since that increment this is not always
valid.
To further simplify the logic of the iterator we no longer store the
index in an optional.
This commit is contained in:
davidot 2022-02-10 11:13:53 +01:00 • committed by Linus Groh
parent fdbfe85a87
commit 45646eee43
7 changed files with 302 additions and 20 deletions
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40
Userland/Libraries/LibJS/Tests/test-common.js
View file

@ -446,6 +446,46 @@ class ExpectationError extends Error {
});
}
toBeIteratorResultWithValue(value) {
this.__expect(this.target !== undefined && this.target !== null);
this.__doMatcher(() => {
this.__expect(
this.target.done === false,
() =>
`toGiveIteratorResultWithValue: expected 'done' to be _false_ got ${valueToString(
this.target.done
)}`
);
this.__expect(
deepEquals(value, this.target.value),
() =>
`toGiveIteratorResultWithValue: expected 'value' to be _${valueToString(
value
)}_ got ${valueToString(this.target.value)}`
);
});
}
toBeIteratorResultDone() {
this.__expect(this.target !== undefined && this.target !== null);
this.__doMatcher(() => {
this.__expect(
this.target.done === true,
() =>
`toGiveIteratorResultDone: expected 'done' to be _true_ got ${valueToString(
this.target.done
)}`
);
this.__expect(
this.target.value === undefined,
() =>
`toGiveIteratorResultDone: expected 'value' to be _undefined_ got ${valueToString(
this.target.value
)}`
);
});
}
__doMatcher(matcher) {
if (!this.inverted) {
matcher();