Add fixture pausing with UI controls

src/browser/fixture.js

@@ -51,5 +51,18 @@ export async function fixture(element, opts = {}) {
 	await Promise.all([reset(opts), document.fonts.ready]);
 	const elem = await wcFixture(element);
 	await waitForElem(elem, opts.awaitLoadingComplete);
+
+	await pause();
 	return elem;
 }
+
+async function pause() {
+	const test = window.d2lTest || {};
+
+	test.update?.();
+
+	if (test.pause) {
+		await test.pause;
+		if (test.pause) test.pause = new Promise(r => test.run = r);
+	}
+}

src/server/headed-mode-plugin.js

@@ -1,3 +1,4 @@
+import { dirname, join } from 'node:path';
 import { globSync } from 'glob';
 
 export function headedMode({ open, watch, pattern }) {
@@ -8,7 +9,8 @@ export function headedMode({ open, watch, pattern }) {
 		name: 'brightspace-headed-mode',
 		async transform(context) {
 			if ((watch || open) && files.includes(context.path.slice(1))) {
-				return `debugger;\n${context.body}`;
+				const pausePath = join(dirname(import.meta.url), 'pause.js').replace('file:', '');
+				return `debugger;\nimport '${pausePath}'\n${context.body}`;
 			}
 		}
 	};

src/server/pause.js

@@ -0,0 +1,131 @@
+const test = window.d2lTest = {};
+test.pause = new Promise(r => test.start = r);
+
+const controls = `
+	<style>
+		#d2l-test-controls [hidden] {
+			display: none !important;
+		}
+
+		#d2l-test-controls #start, #run {
+			display: flex;
+			gap: 1em;
+			font-size: 18px;
+			font-family: 'Lato', sans-serif;
+			padding: 1em;
+			background: #fff;
+			color: #222;
+			margin: calc(-30px + -8px) calc(-30px + -8px) calc(30px + 8px);
+			flex-wrap: wrap;
+			align-items: center;
+			box-shadow: 0 0 5px rgba(0,0,0,.5);
+		}
+
+		#d2l-test-controls #start {
+			font-size: 24px;
+			height: 600px;
+			flex-direction: column;
+			justify-content: center;
+			margin-bottom: 0;
+			box-shadow: none;
+		}
+
+		#d2l-test-controls #test-name {
+			flex: 1;
+		}
+
+		#d2l-test-controls button {
+			font-family: 'Lato', sans-serif;
+			background-color: #e3e9f1;
+			color: #202122;
+			border-radius: .3em;
+			border-style: none;
+			font-weight: 700;
+			font-size: .9em;
+			margin: 0;
+			min-height: calc(2em + 2px);
+			outline: none;
+			padding: .55em 1.5em;
+			text-align: center;
+			line-height: 1em;
+			cursor: pointer;
+		}
+
+		#d2l-test-controls button:focus {
+			background-color: #cdd5dc;
+		}
+
+		#d2l-test-controls button:focus {
+			background-color: #cdd5dc;
+		}
+
+		#d2l-test-controls button:focus-visible {
+			box-shadow: 0 0 0 2px #fff, 0 0 0 4px #006fbf;
+		}
+
+		#d2l-test-controls button.primary:focus {
+			background-color: #004489;
+		}
+
+		#d2l-test-controls button[disabled] {
+			opacity: 0.5;
+		}
+	</style>
+	<div id="d2l-test-controls">
+		<div id="start">
+			<span>.${window.__WTR_CONFIG__.testFile.split('?')[0]}</span>
+			<button id="start-button" class="primary">Start</button>
+		</div>
+		<div id="run" hidden>
+			<button id="run-button" class="primary">Run</button>
+			<span id="test-name"></span>
+			<button id="run-all-button">Run All</button>
+		</div>
+	</div>
+`;
+
+document.body.insertAdjacentHTML('afterBegin', controls);
+
+const startBtn = document.querySelector('#start-button');
+startBtn.addEventListener('click', start);
+
+const runAllBtn = document.querySelector('#run-all-button');
+runAllBtn.addEventListener('click', runAll);
+
+const runBtn = document.querySelector('#run-button');
+runBtn.addEventListener('click', run);
+
+const testName = document.querySelector('#test-name');
+
+beforeEach(async function() { // eslint-disable-line no-undef
+	const fixture = new Promise(r => test.update = r);
+	const currentTest = this.currentTest; // eslint-disable-line no-invalid-this
+	setTimeout(async() => {
+		await fixture;
+		testName.innerText = currentTest.fullTitle();
+		if (test.pause) {
+			runBtn.disabled = false;
+			runBtn.focus();
+		}
+	});
+});
+
+function start() {
+	document.querySelector('#start').hidden = true;
+	document.querySelector('#run').hidden = false;
+	test.start();
+}
+
+function run() {
+	runBtn.disabled = true;
+	test.run();
+}
+
+function runAll() {
+	runAllBtn.disabled = true;
+	test.pause = null;
+	run();
+}
+
+await test.pause;
+test.pause = new Promise(r => test.run = r);