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test: setOffline() persists across navigations #42252

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Merged
Dmitry Gozman (dgozman) merged 1 commit into from
Aug 14, 2026
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test: setOffline() persists across navigations #42252

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32 changes: 32 additions & 0 deletions tests/library/browsercontext-basic.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -366,6 +366,38 @@ it('should emulate navigator.onLine', async ({ browser, server }) => {
await context.close();
});

it('should emulate navigator.onLine across navigations', {
annotation: [
{ type: 'issue', description: 'https://github.com/microsoft/playwright/issues/42174' },
{ type: 'issue', description: 'https://issues.chromium.org/issues/544795254' },
],
}, async ({ browser, server, browserName }) => {
it.fixme(browserName === 'chromium', 'does not survive cross-process navgiation');

const context = await browser.newContext();
const page = await context.newPage();
await page.goto(server.EMPTY_PAGE);
expect(await page.evaluate(() => window.navigator.onLine)).toBe(true);
await context.setOffline(true);
expect(await page.evaluate(() => window.navigator.onLine)).toBe(false);

await page.goto('about:blank');
expect(await page.evaluate(() => window.navigator.onLine)).toBe(false);
await page.goto('data:text/html,<title>offline</title>');
expect(await page.evaluate(() => window.navigator.onLine)).toBe(false);

if (browserName === 'chromium') {
// Try a cross-process navigation in Chromium, which allows routing while offline.
await page.route('**/*', route => route.fulfill({ contentType: 'text/html', body: '<html></html>' }));
await page.goto(server.CROSS_PROCESS_PREFIX + '/empty.html');
expect(await page.evaluate(() => window.navigator.onLine)).toBe(false);
}

await context.setOffline(false);
expect(await page.evaluate(() => window.navigator.onLine)).toBe(true);
await context.close();
});

it('should emulate offline event', { annotation: { type: 'issue', description: 'https://github.com/microsoft/playwright/issues/37295' } }, async ({ browser }) => {
const context = await browser.newContext();
const page = await context.newPage();
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