switch.js
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switch.js
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	import { test, summary } from './helpers.js';

	console.log('Switch Tests\n');

	let x = 2;
	let result = 0;
	switch (x) {
	case 1: result = 10; break;
	case 2: result = 20; break;
	case 3: result = 30; break;
	default: result = 99;
	}
	test('switch case 2', result, 20);

	let y = 1;
	let sum = 0;
	switch (y) {
	case 1: sum += 1;
	case 2: sum += 2;
	case 3: sum += 3; break;
	default: sum += 100;
	}
	test('switch fall-through', sum, 6);

	let fruit = 'apple';
	let color = '';
	switch (fruit) {
	case 'apple': color = 'red'; break;
	case 'banana': color = 'yellow'; break;
	case 'grape': color = 'purple'; break;
	default: color = 'unknown';
	}
	test('switch string', color, 'red');

	let z = 5;
	let msg = '';
	switch (z) {
	case 1: msg = 'one'; break;
	case 2: msg = 'two'; break;
	default: msg = 'other';
	}
	test('switch default', msg, 'other');

	let a = 0;
	let aResult = '';
	switch (a) {
	case 0: aResult = 'zero'; break;
	case 1: aResult = 'one'; break;
	}
	test('switch case 0', aResult, 'zero');

	let b = true;
	let bResult = '';
	switch (b) {
	case true: bResult = 'true'; break;
	case false: bResult = 'false'; break;
	}
	test('switch boolean', bResult, 'true');

	function getGrade(score) {
	switch (true) {
	case score >= 90: return 'A';
	case score >= 80: return 'B';
	case score >= 70: return 'C';
	default: return 'F';
	}
	}
	test('switch expression A', getGrade(95), 'A');
	test('switch expression B', getGrade(85), 'B');
	test('switch expression F', getGrade(50), 'F');

	summary();