import { getTestRunner } from './mod.ts';
import {
	chars,
	ctrl_key,
	is_ascii,
	is_control,
	noop,
	ord,
	strlen,
	truncate,
} from './utils.ts';

getTestRunner().then((t) => {
	t.test('noop fn', () => {
		t.assertExists(noop);
		t.assertEquals(noop(), undefined);
	});

	// ---------------------------------------------------------------------------
	// Strings
	// ---------------------------------------------------------------------------
	t.test('ord fn returns 256 on invalid string', () => {
		t.assertEquals(ord(''), 256);
	});

	t.test('chars fn properly splits strings into unicode characters', () => {
		t.assertEquals(chars('😺😸😹'), ['😺', '😸', '😹']);
	});

	t.test('ctrl_key fn returns expected values', () => {
		const ctrl_a = ctrl_key('a');
		t.assertTrue(is_control(ctrl_a));
		t.assertEquals(ctrl_a, String.fromCodePoint(0x01));

		const invalid = ctrl_key('😺');
		t.assertFalse(is_control(invalid));
		t.assertEquals(invalid, '😺');
	});

	t.test('is_ascii properly discerns ascii chars', () => {
		t.assertTrue(is_ascii('asjyverkjhsdf1928374'));
		t.assertFalse(is_ascii('😺acalskjsdf'));
		t.assertFalse(is_ascii('ab😺ac'));
	});

	t.test('is_control fn works as expected', () => {
		t.assertFalse(is_control('abc'));
		t.assertTrue(is_control(String.fromCodePoint(0x01)));
		t.assertFalse(is_control('😺'));
	});

	t.test('strlen fn returns expected length for ascii strings', () => {
		t.assertEquals(strlen('abc'), 'abc'.length);
	});

	t.test('strlen fn returns expected length for multibyte characters', () => {
		t.assertEquals(strlen('😺😸😹'), 3);
		t.assertNotEquals('😺😸😹'.length, strlen('😺😸😹'));

		// Skin tone modifier + base character
		t.assertEquals(strlen('🤰🏼'), 2);
		t.assertNotEquals('🤰🏼'.length, strlen('🤰🏼'));

		// This has 4 sub-characters, and 3 zero-width-joiners
		t.assertEquals(strlen('👨‍👩‍👧‍👦'), 7);
		t.assertNotEquals('👨‍👩‍👧‍👦'.length, strlen('👨‍👩‍👧‍👦'));
	});

	t.test('truncate shortens strings', () => {
		t.assertEquals(truncate('😺😸😹', 1), '😺');
		t.assertEquals(truncate('😺😸😹', 5), '😺😸😹');
		t.assertEquals(truncate('👨‍👩‍👧‍👦', 5), '👨‍👩‍👧');
	});
});