Flutter drive --browser-dimension not working

Is there an existing issue for this?

I have searched the existing issues
I have read the guide to filing a bug

Steps to reproduce

I am trying to run flutter web test on Chrome, with the following command:

flutter drive \
  --driver=test_driver/integration_test.dart \
  --target=integration_test/main_test.dart > C:\Automation_test\Report_log\log.txt \
  --browser-dimension="1920,1080" \
  -d chrome

Expected results

The browser is resized to 1920 x 1080 when start.

Actual results

The browser is NOT resized to 1920 x 1080 when start.

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Screenshots or Video

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Thanks for the report. I verified using a sample app and running using latest versions and observed that passing browser dimension is not taking effect. I tried passing different dimensions, but the browser window size is same:

1920 x 1080:

400 x 800:

Without passing --browser-dimension argument:

@darshankawar

Could you please help to fix this issue soon @darshankawar?

Thanks very much!

Yes, I can confirm it still exists on the latest Flutter release 3.24.5
is there any workaround

@kevmoo

@kevmoo Sorry to mention you, but could you look into this issue, it is breaking the visual UI testing(golden testing) for Flutter web

We need to add mobile emulation in dart.

Here same bug with selenium and fix for it.

const { Builder } = require('selenium-webdriver');
const chrome = require('selenium-webdriver/chrome');
const fs = require('fs');

const options = new chrome.Options();
options.addArguments('--no-sandbox');

// FIX BUG ==>
options.setMobileEmulation({
    deviceMetrics: {
        width: 393,
        height: 852,
        pixelRatio: 3.0 // iPhone 15 size
    },
    userAgent: 'Mozilla/5.0 (Linux; Android 11; Pixel 6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.91 Mobile Safari/537.36'
});

const driver = new Builder()
    .forBrowser('chrome')
    .usingServer('http://localhost:4444')
    .setChromeOptions(options)
    .build();

(async function resize() {
    try {
        await driver.manage().window().setRect({ width: 393, height: 852 });
        if (!fs.existsSync('screenshots')) {
            fs.mkdirSync('screenshots');
        }
        const screenshot = await driver.takeScreenshot();
        fs.writeFileSync('screenshots/screenshot.png', screenshot, 'base64');
    } finally {
        await driver.quit();
    }
})();

@amrgetment

@amrgetment I am created pull request. You can apply patch to stable Flutter with git apply patch.diff, don't forget to clean ~/.pub-cache before use, if it is not clean setup.

Precise browser resizing with integration_test and driver (#160678)

Precise browser resizing with integration_test and driver (flutter#16…

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

@darshankawar

Hi @darshankawar, not long ago this issue was closed as fixed by #160678. While investigating another driver issue on master channel, I noticed that passing --browser-dimensions doesn't resize the browser window.

I am using flutter-dev to run Flutter Tools from source.

With `--browser-dimension='200x300@1'`

flutter-dev drive \
   --driver=test_driver/integration_test.dart \
   --target=integration_test/app_test.dart \
   -d chrome --browser-dimension='200x300@1'

Without `--browser-dimension`

flutter-dev drive \
   --driver=test_driver/integration_test.dart \
   --target=integration_test/app_test.dart \
   -d chrome

⠀

Could you please try to reproduce the issue again on master channel? Thanks in advance!

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Flutter drive --browser-dimension not working #136109

Is there an existing issue for this?

Steps to reproduce

Expected results

Actual results

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With `--browser-dimension='200x300@1'`

Without `--browser-dimension`

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Flutter drive --browser-dimension not working #136109

Description

Is there an existing issue for this?

Steps to reproduce

Expected results

Actual results

Code sample

Screenshots or Video

Logs

Flutter Doctor output

Activity

darshankawar commented on Oct 9, 2023

hoantruong commented on Oct 25, 2023

amrgetment commented on Dec 5, 2024

amrgetment commented on Dec 5, 2024

munrocket commented on Dec 19, 2024

munrocket commented on Dec 22, 2024

github-actions commented on Jun 10, 2025

ksokolovskyi commented on Jul 14, 2025

With --browser-dimension='200x300@1'

Without --browser-dimension

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Metadata

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Issue actions

With `--browser-dimension='200x300@1'`

Without `--browser-dimension`