import { describe, expect, it } from 'vitest'; import { base64ToText, isValidBase64, removePotentialDataAndMimePrefix, textToBase64 } from './base64'; describe('base64 utils', () => { describe('textToBase64', () => { it('should convert string into base64', () => { expect(textToBase64('')).to.eql(''); expect(textToBase64('a')).to.eql('YQ=='); expect(textToBase64('lorem ipsum')).to.eql('bG9yZW0gaXBzdW0='); expect(textToBase64('-1')).to.eql('LTE='); expect(textToBase64('<<>>', { makeUrlSafe: false })).to.eql('PDw8Pz8/Pz8/Pz8+Pj4='); }); it('should convert string into url safe base64', () => { expect(textToBase64('', { makeUrlSafe: true })).to.eql(''); expect(textToBase64('a', { makeUrlSafe: true })).to.eql('YQ'); expect(textToBase64('lorem ipsum', { makeUrlSafe: true })).to.eql('bG9yZW0gaXBzdW0'); expect(textToBase64('<<>>', { makeUrlSafe: true })).to.eql('PDw8Pz8_Pz8_Pz8-Pj4'); }); }); describe('base64ToText', () => { it('should convert base64 into text', () => { expect(base64ToText('')).to.eql(''); expect(base64ToText('YQ==', { makeUrlSafe: false })).to.eql('a'); expect(base64ToText('bG9yZW0gaXBzdW0=')).to.eql('lorem ipsum'); expect(base64ToText('data:text/plain;base64,bG9yZW0gaXBzdW0=')).to.eql('lorem ipsum'); expect(base64ToText('LTE=')).to.eql('-1'); }); it('should convert url safe base64 into text', () => { expect(base64ToText('', { makeUrlSafe: true })).to.eql(''); expect(base64ToText('YQ', { makeUrlSafe: true })).to.eql('a'); expect(base64ToText('bG9yZW0gaXBzdW0', { makeUrlSafe: true })).to.eql('lorem ipsum'); expect(base64ToText('data:text/plain;base64,bG9yZW0gaXBzdW0', { makeUrlSafe: true })).to.eql('lorem ipsum'); expect(base64ToText('LTE', { makeUrlSafe: true })).to.eql('-1'); expect(base64ToText('PDw8Pz8_Pz8_Pz8-Pj4', { makeUrlSafe: true })).to.eql('<<>>'); }); it('should throw for incorrect base64 string', () => { expect(() => base64ToText('a')).to.throw('Incorrect base64 string'); // should not really be false because trimming of space is now implied // expect(() => base64ToText(' ')).to.throw('Incorrect base64 string'); expect(() => base64ToText('é')).to.throw('Incorrect base64 string'); // missing final '=' expect(() => base64ToText('bG9yZW0gaXBzdW0')).to.throw('Incorrect base64 string'); }); }); describe('isValidBase64', () => { it('should return true for correct base64 string', () => { expect(isValidBase64('')).to.eql(true); expect(isValidBase64('bG9yZW0gaXBzdW0=')).to.eql(true); expect(isValidBase64('LTE=')).to.eql(true); expect(isValidBase64('YQ==')).to.eql(true); expect(isValidBase64('data:text/plain;base64,YQ==')).to.eql(true); }); it('should return false for incorrect base64 string', () => { expect(isValidBase64('a')).to.eql(false); expect(isValidBase64('é')).to.eql(false); expect(isValidBase64('data:text/plain;notbase64,YQ==')).to.eql(false); // missing final '=' expect(isValidBase64('bG9yZW0gaXBzdW0')).to.eql(false); }); it('should return true for untrimmed correct base64 string', () => { expect(isValidBase64('bG9yZW0gaXBzdW0= ')).to.eql(true); expect(isValidBase64(' LTE=')).to.eql(true); expect(isValidBase64(' YQ== ')).to.eql(true); expect(isValidBase64(' ')).to.eql(true); }); }); describe('removePotentialDataAndMimePrefix', () => { it('should remove data prefix of string', () => { expect(removePotentialDataAndMimePrefix('')).to.eql(''); expect(removePotentialDataAndMimePrefix('lorem ipsum')).to.eql('lorem ipsum'); expect(removePotentialDataAndMimePrefix('bG9yZW0gaXBzdW0=')).to.eql('bG9yZW0gaXBzdW0='); expect(removePotentialDataAndMimePrefix('data:image/jpeg;base64,lorem')).to.eql('lorem'); expect(removePotentialDataAndMimePrefix('data:image/jpeg;notbase64,lorem')).to.eql( 'data:image/jpeg;notbase64,lorem', ); expect(removePotentialDataAndMimePrefix('data:unknownmime;base64,lorem')).to.eql('lorem'); }); }); });