ow/source/test/null-or-undefined.ts

import test from 'ava';
import m from '..';

test('nullOrUndefined', t => {
	const x = null;
	const y = undefined;

	t.notThrows(() => m(null, m.nullOrUndefined));
	t.notThrows(() => m(undefined, m.nullOrUndefined));
	t.notThrows(() => m(x, m.nullOrUndefined));
	t.notThrows(() => m(y, m.nullOrUndefined));
	t.throws(() => m('foo' as any, m.nullOrUndefined), 'Expected argument to be of type `nullOrUndefined` but received type `string`');
});