043e4f0a08
* fix(base64-file-converter): fix downloading of index.html content without data preambula * feat(base64-file-converter): infer mime type from base64 signature --------- Co-authored-by: akharlov <harl_aa@skbkontur.ru>
33 lines
1.6 KiB
TypeScript
33 lines
1.6 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import { getMimeTypeFromBase64 } from './downloadBase64';
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describe('downloadBase64', () => {
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describe('getMimeTypeFromBase64', () => {
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it('when the base64 string has a data URI, it returns the mime type', () => {
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expect(getMimeTypeFromBase64({ base64String: 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA' })).to.deep.equal({ mimeType: 'image/png' });
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expect(getMimeTypeFromBase64({ base64String: 'data:image/jpg;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA' })).to.deep.equal({ mimeType: 'image/jpg' });
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});
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it('when the base64 string has no data URI, it try to infer the mime type from the signature', () => {
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// https://en.wikipedia.org/wiki/List_of_file_signatures
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// PNG
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expect(getMimeTypeFromBase64({ base64String: 'iVBORw0KGgoAAAANSUhEUgAAAAUA' })).to.deep.equal({ mimeType: 'image/png' });
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// GIF
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expect(getMimeTypeFromBase64({ base64String: 'R0lGODdh' })).to.deep.equal({ mimeType: 'image/gif' });
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expect(getMimeTypeFromBase64({ base64String: 'R0lGODlh' })).to.deep.equal({ mimeType: 'image/gif' });
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// JPG
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expect(getMimeTypeFromBase64({ base64String: '/9j/' })).to.deep.equal({ mimeType: 'image/jpg' });
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// PDF
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expect(getMimeTypeFromBase64({ base64String: 'JVBERi0' })).to.deep.equal({ mimeType: 'application/pdf' });
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});
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it('when the base64 string has no data URI and no signature, it returns an undefined mimeType', () => {
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expect(getMimeTypeFromBase64({ base64String: 'JVBERi' })).to.deep.equal({ mimeType: undefined });
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});
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});
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});
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