surma
d44f1d9677
Checkpoint before integration and package validation. Assisted-by: SurmAgent:unknown [read] [edit] [bash]
54 lines
2.0 KiB
JavaScript
54 lines
2.0 KiB
JavaScript
// https://github.com/quickjs-ng/quickjs/issues/1735
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import { assert, assertThrows } from "./assert.js";
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// String.prototype.repeat throws a RangeError only when n < 0 or n is +Infinity.
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assertThrows(RangeError, () => "".repeat(-1));
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assertThrows(RangeError, () => "ab".repeat(-1));
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assertThrows(RangeError, () => "".repeat(-Infinity));
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assertThrows(RangeError, () => "".repeat(Infinity));
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assertThrows(RangeError, () => "ab".repeat(Infinity));
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// ToIntegerOrInfinity(NaN) is 0, and so is ToIntegerOrInfinity(undefined).
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assert("".repeat(NaN), "");
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assert("ab".repeat(NaN), "");
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assert("ab".repeat(undefined), "");
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assert("ab".repeat(-0), "");
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assert("ab".repeat(0.9), "");
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assert("ab".repeat(2.7), "abab");
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assert("".repeat(0), "");
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assert("".repeat(1), "");
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assert("ab".repeat(0), "");
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assert("ab".repeat(1), "ab");
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assert("ab".repeat(3), "ababab");
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// n copies of the empty string is the empty string, no matter how large n is.
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assert("".repeat(Number.MAX_SAFE_INTEGER), "");
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assert("".repeat(2147483648), "");
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assert("".repeat(1e300), "");
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// A non-empty string still overflows the maximum string length.
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assertThrows(RangeError, () => "ab".repeat(Number.MAX_SAFE_INTEGER));
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assertThrows(RangeError, () => "ab".repeat(1e300));
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assertThrows(RangeError, () => "ab".repeat(2147483648));
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// A finite count that is too large is a string length error, not a bad count.
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function messageOf(f) {
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try {
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f();
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} catch (e) {
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return e.message;
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}
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return undefined;
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}
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assert(messageOf(() => "ab".repeat(2147483648)), "string too long");
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assert(messageOf(() => "ab".repeat(-1)), "invalid repeat count");
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assert(messageOf(() => "ab".repeat(Infinity)), "invalid repeat count");
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// The receiver is coerced with ToString before the count is coerced.
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var order = [];
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var count = { valueOf() { order.push("count"); return 0 } };
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var receiver = { toString() { order.push("receiver"); return "" } };
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String.prototype.repeat.call(receiver, count);
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assert(order.join(","), "receiver,count");
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