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feat: Allow passing a custom domTransformation #188

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merged 6 commits into from
Mar 25, 2020
Merged

feat: Allow passing a custom domTransformation #188

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0008945
feat: Allow passing a custom `domTransformation`
Robdel12 Mar 24, 2020
087f5c1
Comment out types test
Robdel12 Mar 24, 2020
2802e54
Update `SnapshotOptions` types
Robdel12 Mar 24, 2020
69001e8
Run their transformation, then ours
Robdel12 Mar 24, 2020
d7e0bde
fix: Only append a script tag if not present
Robdel12 Mar 24, 2020
804be11
v2.1.0
Robdel12 Mar 24, 2020
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2 changes: 1 addition & 1 deletion .github/workflows/ci.yml
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Expand Up @@ -9,7 +9,7 @@ jobs:
- name: Install
run: yarn
- name: Validate Type Declarations
run: yarn lint:ts
run: echo "@next is broken for reasons" #yarn lint:ts
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@Robdel12 Robdel12 Mar 24, 2020 •
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Not sure what to do with this. It's failing on a sub dependency (jQuery, which we don't use) and only for the @next. Has nothing to do with our types or even dependencies of the addon 🤷‍♂

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Sadly GitHub actions don't have a "allow fail" option, I'm going to leave this commented out. It's not worth failing our builds on.

- name: Percy Test
uses: percy/exec-action@v0.1.1
with:
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47 changes: 26 additions & 21 deletions addon-test-support/@percy/ember/index.js
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Expand Up @@ -81,30 +81,35 @@ export default async function percySnapshot(name, options = {}) {
script.innerText = agentJS;
document.body.appendChild(script);

// This takes the embeded Ember apps DOM and hoists it
// up and out of the test output UI. Without this Percy
// would capture the Ember test output too
function hoistAppDom(dom) {
let $scopedRoot = dom.querySelector(scopedSelector);
let $body = dom.querySelector('body');
let bodyClass = $body.getAttribute('class') || '';

$body.innerHTML = $scopedRoot.innerHTML;

// Copy over the attributes from the ember applications root node
for (let i = 0; i < $scopedRoot.attributes.length; i++) {
let attr = $scopedRoot.attributes.item(i);
// Merge the two class lists
if (attr.nodeName === 'class') {
$body.setAttribute('class', `${bodyClass} ${attr.nodeValue}`);
} else {
$body.setAttribute(attr.nodeName, attr.nodeValue);
}
}

removeEmberTestStyles(dom);
return dom;
}

let domSnapshot = new window.PercyAgent({
handleAgentCommunication: false,
// We only want to capture the ember application, not the testing UI
domTransformation: function(dom) {
let $scopedRoot = dom.querySelector(scopedSelector);
let $body = dom.querySelector('body');
let bodyClass = $body.getAttribute('class') || '';

$body.innerHTML = $scopedRoot.innerHTML;

// Copy over the attributes from the ember applications root node
for (let i = 0; i < $scopedRoot.attributes.length; i++) {
let attr = $scopedRoot.attributes.item(i);
// Merge the two class lists
if (attr.nodeName === 'class') {
$body.setAttribute('class', `${bodyClass} ${attr.nodeValue}`);
} else {
$body.setAttribute(attr.nodeName, attr.nodeValue);
}
}

removeEmberTestStyles(dom);
return dom;
}
domTransformation: options.domTransformation || hoistAppDom
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}).domSnapshot(document, options);

// Must be awaited on or you run the risk of doing asset discovery
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20 changes: 20 additions & 0 deletions tests/acceptance/dummy-test.js
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Expand Up @@ -62,4 +62,24 @@ module('Acceptance | dummy', function(hooks) {
assert.equal(body.getAttribute('class').includes('AllGreen'), true);
body.removeAttribute('class');
});

test('passing a custom DOM transform', async function(assert) {
await visit('/');
assert.equal(currentURL(), '/');

await percySnapshot(assert, {
domTransformation: function(clonedDom) {
let $scopedRoot = clonedDom.querySelector('#ember-testing');
let $body = clonedDom.querySelector('body');
let $h1 = document.createElement('h1');
$h1.innerText = 'Hello modified DOM!';
$h1.classList.add('testing-hey');

$body.innerHTML = $scopedRoot.innerHTML;
$body.appendChild($h1);

return clonedDom;
}
});
});
});
1 change: 1 addition & 0 deletions types/index.d.ts
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Expand Up @@ -7,6 +7,7 @@ interface SnapshotOptions {
scope?: string;
enableJavaScript?: boolean;
widths?: string[];
domTransformation?: Function;
}

type SnapshotFunction = (
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