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refactor(lqip-loader): split test files (#6858)

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Joshua Chen 2022-03-06 18:34:04 +08:00 • committed by GitHub
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5 changed files with 33 additions and 25 deletions
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67
packages/lqip-loader/src/__tests__/index.test.ts
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import path from 'path';
import Vibrant from 'node-vibrant';
import type {Palette} from 'node-vibrant/lib/color';
import {toPalette, toBase64} from '../utils';
import * as lqip from '../lqip';
describe('lqip-loader', () => {
describe('toBase64', () => {
test('should return a properly formatted Base64 image string', () => {
const expected = 'data:image/jpeg;base64,aGVsbG8gd29ybGQ=';
const mockedMimeType = 'image/jpeg';
const mockedBase64Data = Buffer.from('hello world');
expect(toBase64(mockedMimeType, mockedBase64Data)).toEqual(expected);
});
});
describe('toPalette', () => {
let correctTestSwatch: Palette = {};
let testSwatchWithNull: Palette & {Vibrant?: null} = {};
beforeAll(() => {
const imgPath = path.join(__dirname, '__fixtures__', 'endi.jpg');
const vibrant = new Vibrant(imgPath, {});
return vibrant.getPalette().then((palette) => {
correctTestSwatch = {...palette};
testSwatchWithNull = {...palette, Vibrant: null};
});
});
it('should return 6 hex colours sorted by popularity', () => {
expect(toPalette(correctTestSwatch)).toHaveLength(6);
});
it('should return 5 hex colours with no errors if a palette was incomplete', () => {
expect(toPalette(testSwatchWithNull)).toHaveLength(5);
});
});
describe('lqip library', () => {
const imgPath = path.join(__dirname, '__fixtures__', 'endi.jpg');
const invalidPath = path.join(__dirname, '__fixtures__', 'docusaurus.svg');
it('should reject unknown or unsupported file format', async () => {
await expect(lqip.base64(invalidPath)).rejects.toBeTruthy();
});
it('should generate a valid base64', async () => {
const expectedBase64 = 'data:image/jpeg;base64,/9j/2wBDA';
await expect(lqip.base64(imgPath)).resolves.toContain(expectedBase64);
});
it('should generate a valid color palette', async () => {
const imgPalette = await lqip.palette(imgPath);
expect(imgPalette).toHaveLength(6);
expect(imgPalette).toContain('#578ca1');
});
});
});