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https://github.com/CorentinTh/it-tools.git
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70 lines
3 KiB
TypeScript
70 lines
3 KiB
TypeScript
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import { describe, expect, it } from 'vitest';
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import { base64ToText, isValidBase64, removePotentialDataAndMimePrefix, textToBase64 } from './base64';
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describe('base64 utils', () => {
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describe('textToBase64', () => {
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it('should convert string into base64', () => {
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expect(textToBase64('')).to.eql('');
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expect(textToBase64('a')).to.eql('YQ==');
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expect(textToBase64('lorem ipsum')).to.eql('bG9yZW0gaXBzdW0=');
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expect(textToBase64('-1')).to.eql('LTE=');
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});
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});
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describe('base64ToText', () => {
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it('should convert base64 into text', () => {
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expect(base64ToText('')).to.eql('');
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expect(base64ToText('YQ==')).to.eql('a');
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expect(base64ToText('bG9yZW0gaXBzdW0=')).to.eql('lorem ipsum');
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expect(base64ToText('data:text/plain;base64,bG9yZW0gaXBzdW0=')).to.eql('lorem ipsum');
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expect(base64ToText('LTE=')).to.eql('-1');
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});
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it('should throw for incorrect base64 string', () => {
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expect(() => base64ToText('a')).to.throw('Incorrect base64 string');
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expect(() => base64ToText(' ')).to.throw('Incorrect base64 string');
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expect(() => base64ToText('é')).to.throw('Incorrect base64 string');
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// missing final '='
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expect(() => base64ToText('bG9yZW0gaXBzdW0')).to.throw('Incorrect base64 string');
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});
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});
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describe('isValidBase64', () => {
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it('should return true for correct base64 string', () => {
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expect(isValidBase64('')).to.eql(true);
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expect(isValidBase64('bG9yZW0gaXBzdW0=')).to.eql(true);
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expect(isValidBase64('LTE=')).to.eql(true);
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expect(isValidBase64('YQ==')).to.eql(true);
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expect(isValidBase64('data:text/plain;base64,YQ==')).to.eql(true);
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});
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it('should return false for incorrect base64 string', () => {
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expect(isValidBase64('a')).to.eql(false);
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expect(isValidBase64(' ')).to.eql(false);
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expect(isValidBase64('é')).to.eql(false);
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expect(isValidBase64('data:text/plain;notbase64,YQ==')).to.eql(false);
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// missing final '='
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expect(isValidBase64('bG9yZW0gaXBzdW0')).to.eql(false);
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});
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it('should return false for untrimmed correct base64 string', () => {
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expect(isValidBase64('bG9yZW0gaXBzdW0= ')).to.eql(false);
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expect(isValidBase64(' LTE=')).to.eql(false);
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expect(isValidBase64(' YQ== ')).to.eql(false);
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});
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});
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describe('removePotentialDataAndMimePrefix', () => {
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it('should remove data prefix of string', () => {
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expect(removePotentialDataAndMimePrefix('')).to.eql('');
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expect(removePotentialDataAndMimePrefix('lorem ipsum')).to.eql('lorem ipsum');
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expect(removePotentialDataAndMimePrefix('bG9yZW0gaXBzdW0=')).to.eql('bG9yZW0gaXBzdW0=');
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expect(removePotentialDataAndMimePrefix('data:image/jpeg;base64,lorem')).to.eql('lorem');
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expect(removePotentialDataAndMimePrefix('data:image/jpeg;notbase64,lorem')).to.eql(
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'data:image/jpeg;notbase64,lorem',
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);
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expect(removePotentialDataAndMimePrefix('data:unknownmime;base64,lorem')).to.eql('lorem');
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});
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});
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});
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