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LibJS: Implement the Error Cause proposal

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Currently stage 3. https://github.com/tc39/proposal-error-cause
This commit is contained in:
Linus Groh 2021-06-11 20:40:08 +01:00
parent 8d77a3297a
commit 862ba64037
11 changed files with 130 additions and 42 deletions
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27
Userland/Libraries/LibJS/Tests/builtins/Error/Error.js
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@ -31,4 +31,31 @@ describe("normal behavior", () => {
expect(TypeError()).toBeInstanceOf(TypeError);
expect(new TypeError()).toBeInstanceOf(TypeError);
});
test("supports options object with cause", () => {
const errors = [Error, EvalError, RangeError, ReferenceError, SyntaxError, TypeError];
const cause = new Error();
errors.forEach(T => {
const error = new T("test", { cause });
expect(error.hasOwnProperty("cause")).toBeTrue();
expect(error.cause).toBe(cause);
});
});
test("supports options object with cause (chained)", () => {
let error;
try {
try {
throw new Error("foo");
} catch (e) {
throw new Error("bar", { cause: e });
}
} catch (e) {
error = new Error("baz", { cause: e });
}
expect(error.message).toBe("baz");
expect(error.cause.message).toBe("bar");
expect(error.cause.cause.message).toBe("foo");
expect(error.cause.cause.cause).toBe(undefined);
});
});