index.js

var util = require('util');
var test = require('tape');

var width = require('../index');

var f = util.format;

test('supported flag', function(t) {
	t.ok(width.supported === true);
	t.end();
});

test('zero text width for empty string', function(t) {
	var result = width('');

	t.ok(result === 0);
	t.end();
});

test('non-zero text width with no options', function(t) {
	var result = width('hello');

	t.ok(result > 0, f('measured width %s', result));
	t.end();
});

test('longer word yields greater width', function(t) {
	var result1 = width('hello');
	var result2 = width('helloyou');

	t.ok(result1 > 0);
	t.ok(result2 > result1, f('measured width %s > %s', result2, result1));
	t.end();
});

test('increased font size yields greater width', function(t) {
	var result1 = width('hello', { size: 10 });
	var result2 = width('hello', { size: 20 });

	t.ok(result1 > 0);
	t.ok(result2 > result1, f('measured width %s > %s', result2, result1));
	t.end();
});

test('increased font weight yields greater width', function(t) {
	var result1 = width('hello', { weight: 'normal' });
	var result2 = width('hello', { weight: 'bold' });

	t.ok(result1 > 0);
	t.ok(result2 > result1, f('measured width %s > %s', result2, result1));
	t.end();
});