Move image utilities into /spec to make it clear that they are only for testing

spec/helpers/toLookLike.mjs

@@ -0,0 +1,5 @@
+import {matchers} from '../image/ImageSimilarity.mjs';
+
+beforeAll(() => {
+	jasmine.addMatchers(matchers);
+});

spec/image/ImageRegion_spec.mjs

@@ -1,7 +1,7 @@
 /* eslint-disable max-statements */
 
 import ImageRegion from './ImageRegion.mjs';
-import {nodejs} from '../core/browser.mjs';
+import {nodejs} from '../../scripts/core/browser.mjs';
 
 describe('ImageRegion', () => {
 	function makeCanvas(w, h) {

spec/image/ImageSimilarity.mjs

@@ -1,7 +1,7 @@
 import './Blur.mjs';
 import './Composition.mjs';
 import ImageRegion from './ImageRegion.mjs';
-import {headless} from '../core/browser.mjs';
+import {headless} from '../../scripts/core/browser.mjs';
 
 function getThresholds({
 	pixelThresh = 2,

spec/images_webspec.mjs

@@ -1,7 +1,6 @@
-import ImageRegion from '../image/ImageRegion.mjs';
-import SequenceDiagram from './SequenceDiagram.mjs';
-import TESTS from '../../spec/images/list.mjs';
-import {matchers} from '../image/ImageSimilarity.mjs';
+import ImageRegion from './image/ImageRegion.mjs';
+import SequenceDiagram from '../scripts/sequence/SequenceDiagram.mjs';
+import TESTS from './images/list.mjs';
 
 describe('SequenceDiagram Visuals', () => {
 	const RESOLUTION = 4;
@@ -48,8 +47,6 @@ describe('SequenceDiagram Visuals', () => {
 
 	TESTS.forEach((image) => {
 		it('renders ' + image + ' as expected', (done) => {
-			jasmine.addMatchers(matchers);
-
 			loadAndRenderURL(IMAGE_BASE_PATH + image)
 				.then(({actual, expected, code}) => {
 					const widthSm = Math.min(Math.round(actual.width / 4), 150);

spec/readme_webspec.mjs

@@ -1,6 +1,5 @@
-import ImageRegion from '../image/ImageRegion.mjs';
-import SequenceDiagram from './SequenceDiagram.mjs';
-import {matchers} from '../image/ImageSimilarity.mjs';
+import ImageRegion from './image/ImageRegion.mjs';
+import SequenceDiagram from '../scripts/sequence/SequenceDiagram.mjs';
 
 const RESOLUTION = 4;
 
@@ -33,7 +32,6 @@ function makeSampleTests({file, code}, index) {
 	describe('example #' + (index + 1), () => {
 		if(file && !SCREENSHOT_BLACKLIST.includes(file)) {
 			it('looks like ' + file + ' when rendered', (done) => {
-				jasmine.addMatchers(matchers);
 				let actual = null;
 				new SequenceDiagram(code)
 					.getCanvas({resolution: RESOLUTION})