74 lines
2.2 KiB
TypeScript
74 lines
2.2 KiB
TypeScript
// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { assert } from 'chai';
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import loadImage from 'blueimp-load-image';
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import { IMAGE_JPEG, IMAGE_PNG } from '../../types/MIME';
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import { scaleImageToLevel } from '../../util/scaleImageToLevel';
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describe('scaleImageToLevel', () => {
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// NOTE: These tests are incomplete.
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async function getBlob(path: string): Promise<Blob> {
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const response = await fetch(path);
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return response.blob();
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}
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it("doesn't scale images that are already small enough", async () => {
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const testCases = [
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{
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path: '../fixtures/kitten-1-64-64.jpg',
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contentType: IMAGE_JPEG,
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expectedWidth: 64,
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expectedHeight: 64,
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},
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{
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path: '../fixtures/20x200-yellow.png',
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contentType: IMAGE_PNG,
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expectedWidth: 20,
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expectedHeight: 200,
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},
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];
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await Promise.all(
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testCases.map(
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async ({ path, contentType, expectedWidth, expectedHeight }) => {
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const blob = await getBlob(path);
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const scaled = await scaleImageToLevel({
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fileOrBlobOrURL: blob,
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contentType,
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size: blob.size,
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highQuality: true,
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});
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const data = await loadImage(scaled.blob, { orientation: true });
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const { originalWidth: width, originalHeight: height } = data;
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assert.strictEqual(width, expectedWidth);
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assert.strictEqual(height, expectedHeight);
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assert.strictEqual(scaled.contentType, contentType);
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assert.strictEqual(scaled.blob.type, contentType);
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}
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)
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);
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});
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it('removes EXIF data from small images', async () => {
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const original = await getBlob('../fixtures/kitten-2-64-64.jpg');
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assert.isDefined(
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(await loadImage(original, { meta: true, orientation: true })).exif,
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'Test setup failure: expected fixture to have EXIF data'
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);
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const scaled = await scaleImageToLevel({
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fileOrBlobOrURL: original,
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contentType: IMAGE_JPEG,
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size: original.size,
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highQuality: true,
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});
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assert.isUndefined(
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(await loadImage(scaled.blob, { meta: true, orientation: true })).exif
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);
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});
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});
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