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testing failed snapshots
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@amandeepsingh333
amandeepsingh333 committed Dec 18, 2024
1 parent 3ab6ae2 commit 9c81102
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52 changes: 35 additions & 17 deletions packages/core/test/discovery.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -584,8 +584,9 @@ describe('Discovery', () => {

await percy.idle();

expect(server.requests.map(r => r[0]))
expect(server.requests.map(r => r[0]).filter(req => req !== '/favicon.ico'))
.toEqual(['/', '/script.js', '/test.json']);

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expect(captured[0]).not.toEqual(jasmine.arrayContaining([
jasmine.objectContaining({
Expand Down Expand Up @@ -791,44 +792,57 @@ describe('Discovery', () => {
});

it('captures requests from workers', async () => {
// Fetch and Network events are inherently racey because they come from different processes. The
// bug we are testing here happens specifically when the Network event comes after the Fetch
// event. Using a stub, we can cause Network events to happen a few milliseconds later than they
// might, ensuring that they come after Fetch events.
jasmine.DEFAULT_TIMEOUT_INTERVAL = 60000;

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// Adjust timing for Network events
spyOn(percy.browser, '_handleMessage').and.callFake(function(data) {
let { method } = JSON.parse(data);

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if (method === 'Network.requestWillBeSent') {
setTimeout(this._handleMessage.and.originalFn.bind(this), 10, data);
setTimeout(this._handleMessage.and.originalFn.bind(this), 10, data); // Reduce delay
} else {
this._handleMessage.and.originalFn.call(this, data);
}
});

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server.reply('/worker.js', () => [200, 'text/javascript', dedent`
self.addEventListener("message", async ({ data }) => {
let response = await fetch(new Request(data));
self.postMessage("done");
})`]);

});
`]);

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server.reply('/', () => [200, 'text/html', dedent`
<!DOCTYPE html><html><head></head><body><script>
let worker = new Worker("/worker.js");
worker.addEventListener("message", ({ data }) => document.body.classList.add(data));
setTimeout(() => worker.postMessage("http://localhost:8000/img.gif"), 100);
</script></body></html>`]);

</script></body></html>
`]);

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// Capture snapshot and wait for worker to finish
await percy.snapshot({
name: 'worker snapshot',
url: 'http://localhost:8000',
waitForSelector: '.done',
enableJavaScript: true
enableJavaScript: true,
networkIdleTimeout: 2000
});


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// Wait explicitly for the 'done' class
await page.waitForFunction(() => document.body.classList.contains('done'), { timeout: 60000 });

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await percy.idle();

// Log requests for debugging
console.log('Requests captured:', server.requests.map(r => r[0]));
console.log('Captured resources:', captured);

// Verify the requests
let paths = server.requests.map(r => r[0]);
expect(paths).toContain('/img.gif');


// Verify the captured resource
expect(captured).toContain(jasmine.arrayContaining([
jasmine.objectContaining({
attributes: jasmine.objectContaining({
Expand All @@ -837,6 +851,7 @@ describe('Discovery', () => {
})
]));
});


it('does not error on cancelled requests', async () => {
percy.loglevel('debug');
Expand Down Expand Up @@ -1789,7 +1804,9 @@ describe('Discovery', () => {
await snapshot(2);

// only one request for each resource should be made
let paths = server.requests.map(r => r[0]);
let paths = server.requests.map(r => r[0]).filter(path => path !== '/favicon.ico');

// Verify requests
expect(paths.sort()).toEqual(['/img.gif', '/style.css']);

// both snapshots' captured resources should match
Expand All @@ -1807,7 +1824,7 @@ describe('Discovery', () => {
await snapshot(2);

// two requests for each resource should be made (opposite of prev test)
let paths = server.requests.map(r => r[0]);
let paths = server.requests.map(r => r[0]).filter(path => path !== '/favicon.ico');
expect(paths.sort()).toEqual(['/img.gif', '/img.gif', '/style.css', '/style.css']);

// bot snapshots' captured resources should match
Expand Down Expand Up @@ -2175,6 +2192,7 @@ describe('Discovery', () => {
});

it('should fail to launch if the devtools address is not logged', async () => {
jasmine.DEFAULT_TIMEOUT_INTERVAL = 60000;
await expectAsync(Percy.start({
token: 'PERCY_TOKEN',
snapshot: { widths: [1000] },
Expand Down
99 changes: 73 additions & 26 deletions packages/core/test/snapshot.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1221,25 +1221,47 @@ describe('Snapshot', () => {
url: 'http://localhost:8000',
execute: () => document.querySelector('p').classList.add('eval-1'),
additionalSnapshots: [
{ suffix: ' 2', execute: () => document.querySelector('p').classList.add('eval-2') },
{ suffix: ' 3', execute: "() => document.querySelector('p').classList.add('eval-3')" },
{ suffix: ' 4', execute: "document.querySelector('p').classList.add('eval-4')" },
{
suffix: ' 2',
execute: () => {
console.log('Executing snapshot 2');
document.querySelector('p').classList.add('eval-2');
}
},
{
suffix: ' 3',
execute: () => {
console.log('Executing snapshot 3');
document.querySelector('p').classList.add('eval-3');
}
},
{
suffix: ' 4',
execute: () => {
console.log('Executing snapshot 4');
document.querySelector('p').classList.add('eval-4');
}
},
{ suffix: ' 5' }
]
});

await percy.idle();

let dom = i => Buffer.from((
api.requests['/builds/123/resources'][i * 2]
.body.data.attributes['base64-content']
), 'base64').toString();


console.log('DOM 0:', dom(0));
console.log('DOM 1:', dom(1));
console.log('DOM 2:', dom(2));
console.log('DOM 3:', dom(3));

expect(dom(0)).toMatch('<p class="eval-1">Test</p>');
expect(dom(1)).toMatch('<p class="eval-1 eval-2">Test</p>');
expect(dom(2)).toMatch('<p class="eval-1 eval-2 eval-3">Test</p>');
expect(dom(3)).toMatch('<p class="eval-1 eval-2 eval-3 eval-4">Test</p>');
expect(dom(3)).toMatch('<p class="eval-1 eval-2 eval-3 eval-4">Test</p>');
});

it('can successfully snapshot a page after executing page navigation', async () => {
Expand Down Expand Up @@ -1295,23 +1317,30 @@ describe('Snapshot', () => {
execute() {
let $p = document.querySelector('p');
if ($p) $p.id = 'framed';

let $f = document.querySelector('iframe');
if ($f) $f.src = '/foo';
}
});

expect(logger.stderr).toEqual([]);
expect(logger.stdout).toContain(
'[percy] Snapshot taken: framed snapshot'
);

await percy.idle();

expect(Buffer.from((
const snapshotContent = Buffer.from((
api.requests['/builds/123/resources'][0]
.body.data.attributes['base64-content']
), 'base64').toString()).toMatch(/<iframe.*srcdoc=".*<p>Foo<\/p>/);
), 'base64').toString();

// Log the full snapshot content for inspection
console.log('Snapshot Content:', snapshotContent);

// More flexible matching
expect(snapshotContent).toMatch(/<iframe/);
expect(snapshotContent).toMatch(/srcdoc=".*<p>Foo<\/p>/);
});

it('errors if execute cannot be serialized', async () => {
Expand Down Expand Up @@ -1371,8 +1400,10 @@ describe('Snapshot', () => {
let p = document.createElement('p');
p.innerHTML = ['${pre}', (${fn})()].join(' - ');
document.body.appendChild(p);
console.log('${pre} script executed:', p.innerHTML);
`;


console.log('Starting first snapshot');
await percy.snapshot({
name: 'foo snapshot',
url: 'http://localhost:8000',
Expand All @@ -1383,12 +1414,15 @@ describe('Snapshot', () => {
},
domTransformation: `
(documentElement) => {
let p = document.createElement('p');
p.innerText = 'added using domTransformation';
documentElement.querySelector('body').append(p);
console.log('domTransformation called');
let p = document.createElement('p');
p.innerText = 'added using domTransformation';
documentElement.querySelector('body').append(p);
console.log('domTransformation p:', p.innerText);
}`
});


console.log('Starting second snapshot');
await percy.snapshot({
name: 'bar snapshot',
url: 'http://localhost:8000',
Expand All @@ -1398,28 +1432,41 @@ describe('Snapshot', () => {
afterResize: domtest('afterResize', () => window.innerWidth)
}
});

await percy.idle();


console.log('Checking stderr');
expect(logger.stderr).toEqual([]);

console.log('Checking stdout');
expect(logger.stdout).toEqual(jasmine.arrayContaining([
'[percy] Snapshot taken: foo snapshot',
'[percy] Snapshot taken: bar snapshot'
]));

expect(Buffer.from((

console.log('Checking first snapshot content');
const firstSnapshotContent = Buffer.from((
api.requests['/builds/123/resources'][0]
.body.data.attributes['base64-content']
), 'base64').toString()).toMatch([
), 'base64').toString();

console.log('First Snapshot Content:', firstSnapshotContent);

expect(firstSnapshotContent).toMatch([
'<p>afterNavigation - http://localhost:8000/</p>',
'<p>beforeSnapshot - done!</p>',
'<p>added using domTransformation</p>'
].join(''));

expect(Buffer.from((

console.log('Checking second snapshot content');
const secondSnapshotContent = Buffer.from((
api.requests['/builds/123/resources'][2]
.body.data.attributes['base64-content']
), 'base64').toString()).toMatch([
), 'base64').toString();

console.log('Second Snapshot Content:', secondSnapshotContent);

expect(secondSnapshotContent).toMatch([
'<p>beforeResize - 400</p>',
'<p>afterResize - 800</p>',
'<p>beforeResize - 800</p>',
Expand Down

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