[Feature] console events for electron app

[sirtimid]

It would be great if we could use the the pluggable logger sink for Electron tests as well. :)

[pavelfeldman]

We are actually thinking about going the other way around elsewhere. How do you use the sink? Does DEBUG= not work for you?

[sirtimid]

Hey @pavelfeldman I would like to use logger in order to assert things within tests, so I would push the logs in an array and assert that the expected string exists in that array, The DEBUG flag won't help me with this

[sirtimid]

Issue is that currently we can only get the logs from renderer with the console event, I need a way to take the logs from main process as well, spectron has a app.client.getMainProcessLogs() method

[pavelfeldman]

@sirtimid: would it work if you had something like page.on('console') on the electronApp object?

[sirtimid]

@pavelfeldman yeah, for sure, it would be even better TBH!

[rssk]

Is there any way to get at electron main logs from the launched process? It seems like otherwise it'd be hard to debug fails on headless tests

[imolorhe]

I also need this API to retrieve logs from the main process, for the same reasons as @sirtimid. Are there any timelines for this?

[cameron-martin]

It does seem to collect the stdout and stderr of the launched electron process, but I can't work out how to access them via the public APIs.

[Prinzhorn]

It does seem to collect the stdout and stderr of the launched electron process, but I can't work out how to access them via the public APIs.

To safe anyone from going through the same rabbit hole I just did, this works with the latest playwright 1.24.1:

const app = await electron.launch({ args: ['main.js'] });

app.process().stdout.on('data', (data) => console.log(`stdout: ${data}`));
app.process().stderr.on('data', (error) => console.log`stderr: ${error}`));

From #13267 (comment) and #13280

[ahmedmukhtar1133]

@Prinzhorn This doesn't seems to be working in playwright 1.24.2.
This piece of code gives error app.process is not function.

[fcastilloec]

To safe anyone from going through the same rabbit hole I just did, this works with the latest playwright 1.24.1:

const app = await electron.launch({ args: ['main.js'] });

app.process().stdout.on('data', (data) => console.log(`stdout: ${data}`));
app.process().stderr.on('data', (error) => console.log`stderr: ${error}`));

From #13267 (comment) and #13280

Thanks so much for mentioning this new feature! Unfortunately, this doesn't output all stdout or sterr messages from the electron app, only the ones emitted after the app finished loading (from my limited testing, it could be something else). I'm interested in seeing all logs, especially the ones emitted before the did-finish-load event is fired.
As a test, just issue a console.log before you create/load your BrowserWindow and that message is not shown.
So this issue is still not fully fixed.

@Prinzhorn This doesn't seems to be working in playwright 1.24.2. This piece of code gives error app.process is not function.

You can only access the process once the app has finished launching, in other words, you probably forgot to use await when launching your app.

[MatthijsBurgh]

Is there any progress on this one? Has someone maybe found a workaround?

I experience the same issue as @fcastilloec, where logs before loading are not accessible.

edit: I would also like to get the logs of the renderer process, not only the main process.