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web-test-runner.config.mjs
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import { importMapsPlugin } from '@web/dev-server-import-maps';
import { defaultReporter, summaryReporter } from '@web/test-runner';
function customReporter() {
return {
async reportTestFileResults({ logger, sessionsForTestFile }) {
sessionsForTestFile.forEach((session) => {
session.testResults.tests.forEach((test) => {
if (!test.passed && !test.skipped) {
logger.log(test);
}
});
});
},
};
}
export default {
coverageConfig: {
include: [
'**/libs/**',
'**/tools/**',
'**/build/**',
],
exclude: [
'**/mocks/**',
'**/node_modules/**',
'**/test/**',
'**/deps/**',
'**/imslib/imslib.min.js',
// TODO: folders below need to have tests written for 100% coverage
'**/ui/controls/**',
'**/blocks/library-config/**',
'**/hooks/**',
'**/special/tacocat/**',
],
},
plugins: [importMapsPlugin({})],
reporters: [
defaultReporter({ reportTestResults: true, reportTestProgress: true }),
customReporter(),
summaryReporter(),
],
testRunnerHtml: (testFramework) => `
<html>
<head>
<script type='module'>
const oldFetch = window.fetch;
window.fetch = async (resource, options) => {
if (!resource.startsWith('/') && !resource.startsWith('http://localhost')) {
console.error(
'** fetch request for an external resource is disallowed in unit tests, please find a way to mock! https://github.com/orgs/adobecom/discussions/814#discussioncomment-6060759 provides guidance on how to fix the issue.',
resource
);
}
return oldFetch.call(window, resource, options);
};
const oldXHROpen = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.open = async function (...args) {
let [method, url, asyn] = args;
if (!resource.startsWith('/') && url.startsWith('http://localhost')) {
console.error(
'** XMLHttpRequest request for an external resource is disallowed in unit tests, please find a way to mock! https://github.com/orgs/adobecom/discussions/814#discussioncomment-6060759 provides guidance on how to fix the issue.',
url
);
}
return oldXHROpen.apply(this, args);
};
const observer = new MutationObserver((mutationsList, observer) => {
for(let mutation of mutationsList) {
if (mutation.type === 'childList') {
for(let node of mutation.addedNodes) {
if(node.nodeName === 'SCRIPT' && node.src && !node.src.startsWith('http://localhost')) {
console.error(
'** An external 3rd script has been added. This is disallowed in unit tests, please find a way to mock! https://github.com/orgs/adobecom/discussions/814#discussioncomment-6060891 provides guidance on how to fix the issue.',
node.src
);
}
}
}
}
});
observer.observe(document.head, { childList: true });
</script>
</head>
<body>
<script type='module' src='${testFramework}'></script>
</body>
</html>`,
// Comment in the files for selectively running test suites
// npm run test:file:watch allows to you to run single test file & view the result in a browser.
// files: ['**/utils.test.js'],
};