@tsxo/assure/dist/esm/index.js

A lightweight, zero dependancy, and typesafe suite of assert functions.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.assert = assert;
exports.assert_eq = assert_eq;
exports.assert_ne = assert_ne;
exports.assert_gt = assert_gt;
exports.assert_lt = assert_lt;
exports.assert_gte = assert_gte;
exports.assert_lte = assert_lte;
/**
 * Asserts that a given value is truthy and type narrows.
 * If the value is falsy, it throws an error with an optional custom message.
 *
 * @param {unknown} v - The value to check for truthiness.
 * @param {string} [msg] - An optional custom error message to include in the thrown error.
 *
 * @throws {Error} If the value is falsy, throws an error.
 */
function assert(v, msg) {
    const err = "Assertion Error";
    if (!v) {
        const out = msg ? `${err}: ${msg}` : err;
        throw new Error(out);
    }
}
/**
 * Asserts that two values are strictly equal.
 *
 * @template T
 * @param {T} l - The left-hand value to compare.
 * @param {T} r - The right-hand value to compare.
 * @param {string} [msg] - An optional custom error message to include in the thrown error.
 *
 * @throws {Error} If the values are not strictly equal.
 */
function assert_eq(l, r, msg) {
    assert(l === r, msg);
}
/**
 * Asserts that two values are strictly not equal.
 *
 * @template T
 * @param {T} l - The left-hand value to compare.
 * @param {T} r - The right-hand value to compare.
 * @param {string} [msg] - An optional custom error message to include in the thrown error.
 *
 * @throws {Error} If the values are strictly equal.
 */
function assert_ne(l, r, msg) {
    assert(l !== r, msg);
}
/**
 * Asserts that the left-hand value is greater than the right-hand value.
 *
 * @template T
 * @param {T} l - The left-hand value to compare.
 * @param {T} r - The right-hand value to compare.
 * @param {string} [msg] - An optional custom error message to include in the thrown error.
 *
 * @throws {Error} If the left-hand value is not greater than the right-hand value.
 */
function assert_gt(l, r, msg) {
    assert(l > r, msg);
}
/**
 * Asserts that the left-hand value is less than the right-hand value.
 *
 * @template T
 * @param {T} l - The left-hand value to compare.
 * @param {T} r - The right-hand value to compare.
 * @param {string} [msg] - An optional custom error message to include in the thrown error.
 *
 * @throws {Error} If the left-hand value is not less than the right-hand value.
 */
function assert_lt(l, r, msg) {
    assert(l < r, msg);
}
/**
 * Asserts that the left-hand value is greater than or equal to the right-hand value.
 *
 * @template T
 * @param {T} l - The left-hand value to compare.
 * @param {T} r - The right-hand value to compare.
 * @param {string} [msg] - An optional custom error message to include in the thrown error.
 *
 * @throws {Error} If the left-hand value is not greater than or equal to the right-hand value.
 */
function assert_gte(l, r, msg) {
    assert(l >= r, msg);
}
/**
 * Asserts that the left-hand value is less than or equal to the right-hand value.
 *
 * @template T
 * @param {T} l - The left-hand value to compare.
 * @param {T} r - The right-hand value to compare.
 * @param {string} [msg] - An optional custom error message to include in the thrown error.
 *
 * @throws {Error} If the left-hand value is not less than or equal to the right-hand value.
 */
function assert_lte(l, r, msg) {
    assert(l <= r, msg);
}
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