emoji-flags-to-country/test/test.js

Convert emoji country flags to country code.

const assert = require('assert');
const { flagToCountry, getFlagsInText } = require('../index');

describe('Tests for emoji flags to country code', () => {
  it('should return undefined for empty inputs', () => {
    assert.strictEqual(flagToCountry(''), undefined);
    assert.strictEqual(flagToCountry(null), undefined);
    assert.strictEqual(flagToCountry(undefined), undefined);
  });
  it('should return undefined for any character that is not a flag emoji', () => {
    assert.strictEqual(flagToCountry('hello world'), undefined);
    assert.strictEqual(flagToCountry('US'), undefined);
    assert.strictEqual(flagToCountry('😀'), undefined);
  });
  it('should return the correct country code for a given emoji flag', () => {
    assert.strictEqual(flagToCountry('🇮🇹'), 'IT');
    assert.strictEqual(flagToCountry('🇺🇸'), 'US');
    assert.strictEqual(flagToCountry('🇪🇸'), 'ES');
    assert.strictEqual(flagToCountry('🇪🇺'), 'EU');
  });
  it('should return an empty array for an invalid text', () => {
    assert.deepEqual(getFlagsInText(''), []);
    assert.deepEqual(getFlagsInText(null), []);
    assert.deepEqual(getFlagsInText(undefined), []);
  });
  it('should return an empty array for a text with no emoji flags', () => {
    assert.deepEqual(getFlagsInText('This text has no emoji flags 😀'), []);
  });
  it('should return an array of emoji flags for a text with emoji flags', () => {
    const phrases = ['Italians do it better 🇮🇹', '🇮🇹 some flag 🇺🇸 here and there🇪🇸 and also 🇪🇺'];
    assert.deepEqual(getFlagsInText(phrases[0]), ['🇮🇹']);
    assert.deepEqual(getFlagsInText(phrases[1]), ['🇮🇹', '🇺🇸', '🇪🇸', '🇪🇺']);
  });
});