succulent
Version:
Powerful and easy runtime type checking
22 lines • 981 B
JavaScript
/// <reference types="jest" />
import { assertType } from "../_util";
import { check, is, $boolean, $number, $string, $Tuple } from "../index";
test("$tuple", () => {
const strings = $Tuple($string, $string, $string);
const various = $Tuple($string, $number, $boolean);
expect(is(["hi", "hey"], strings)).toBe(false);
expect(is(["hi", "hey", "hello"], strings)).toBe(true);
expect(is(["hi", "hey", "hello", "howdy"], strings)).toBe(false);
expect(is(["hi", "hey", "hello"], various)).toBe(false);
expect(is(["hi", 0, false], strings)).toBe(false);
expect(is(["hi", 0, false], various)).toBe(true);
expect(() => check(["hi", "hi"], strings)).toThrowErrorMatchingSnapshot();
expect(() => check(["hi", "hi", "hi", "howdy"], strings)).toThrowErrorMatchingSnapshot();
function _(x) {
if (is(x, strings))
assertType(x);
if (is(x, various))
assertType(x);
}
});
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